II-VI Compoundsand

Semimagnetic Semiconductors

Joint Proceedings

ofThe Third European Workshop on II-VI Compounds

Linz, Austria, 26 - 28 September 1994

and

The Fourth International Workshop on Semimagnetic(Diluted Magnetic) Semiconductors

Linz, Austria, 26 - 28 September 1994

Editors:

H. HeinrichJohannes Kepler Universitat Linz

Linz, Austria

and

J.B. MUIUFIElectronic Materials Consultancy

Malvern, UK

TRANS TECH PUBLICATIONSSwitzerland - Germany - UK - USA

Table of Contents

Committees vSponsors viiPreface ixEditorial Comment xAcknowledgements xii

EUROPEAN WORKSHOP ON II-VI COMPOUNDS

Doping of II-VI Compounds

Doping of ZnSe and II-VI Quantum Structures (invited)B.C. Cavenett, S.Y. Wang and K.A. Prior 5

Compensation Processes in MBE Grown ZnSe:N (invited)K.A. Prior 11

Band Offset Engineering of II-VI/III-V Heterointerfaces (invited)A. Franciosi, L. Vanzetti, L. Sorba, A. Bonanni, R. Cingolani,M. Lomascolo and D. Greco 17

n and p Type Doping Control of CdTe and CdZnTe Epilayers andCdTe/CdZnTe Quantum Structures (invited)

S. Tatarenko, K. Saminadayar, T. Baron, F. Bassani, N. Magnea,R.T. Cox, K. Kheng, B. Daudin and D. Brun 23

Doping Limits in Wide Gap II-VI Compounds (invited)W. Faschinger, S. Ferreira, H. Sitter, R. Krump and G. Brunthaler 29

Low Temperature Growth and Planar Nitrogen Doping of ZnSe in aPlasma-Stimulated LP-MOVPE System

W. Taudt, B. Wachtendorf, H. Hamadeh, S. Lampe, A.L. Gurskii,M. Heuken, V. Kutzer, R. Heitz, U. Derscheid and A. Hoffmann 35

Formation of a Pd Defect Complex in ZnTe and CdTeD. Schumann, S. Hermann, H.-E. Mahnke, B. Spellmeyer, G. Sulzer,M. Wienecke and H.-E. Gumlich 39

Growth and Doping of II-VI Materials for Blue/Green LasersK. Rakennus, P. Uusimaa, J. Likonen, P. Savolainen and M. Pessa 43

The Thermal Decomposition of Selected Amines in Relation to theNitrogen Doping of ZnSe by MO VPE

R. Helbing, W.S. Kuhn and O. Gorochov 47

xiv II-VI Compounds and Semimagnetic Semiconductors

Anomalous Diffusion of Hg in CdTeM.U. Ahmed, E.D. Jones, J.B. Mullin and N.M. Stewart 51

The Diffusion of Bromine into CdTeJ. Malzbender, E.D. Jones, N. Shaw and J.B. Mullin 57

Time Dependence of Zinc Diffusion in Bulk CdTeJ.C. Clark, E.D. Jones, J.B. Mullin and A.W. Brinkman 63

Acceptor-Doping in ZnS/GaAs Grown by Means of the Post-HeatedMolecular Beam Epitaxy

H. Saito, M. Yoneta, M. Ohishi, H. Kobashi, C. Hatano and K. Kitani 69

Analysis of Doping in ZnSe and ZnSSe by Far-Infrared Reflectanceunder Oblique Incidence

J. Hermans, V. Offermann, J. Woitok, J. Geurts, H. Stanzl andW. Gebhardt 73

N-Type Doping of MBE Grown ZnMgSe Using ZnCl2S.O. Ferreira, W. Faschinger and H. Sitter 77

Study of Doping Modulated CdHgTe StructuresV. Sallet, M. Cuniot, Y. Marfaing and R. Triboulet 81

Structured Materials, Quantum Wires and Dots

Nanofabrication of II-VI Semiconductor Quantum Wires and Dots(invited)

CM. Sotomayor Torres, A. Ross, Y.S. Tang, A. Ribayrol, S. Thorns,A.S. Bunting, H.P. Zhou, K. Tsutsui, H. McLelland, H.P. Wagner,B. Lunn and D.E. Ashenford 87

Nonlinear Absorption and Gain in CdSe and CdSSe Quantum Dots(invited)

U. Woggon, O. Wind, C. Klingshirn, H. Giessen, B. Fluegel, G. Mohsand N. Peyghambarian 93

Fabrication and Optical Properties of CdTe/CdZnTe Quantum Wiresand Dots (invited)

H. Mariette, C. Gourgon, L.S. Dang, C. Vieu, N. Pelekanos andW.W. Riihle 99

MOVPE of ZnSe and Zn(S,Se) for Blue LEDs (invited)W. Gebhardt, H. Stanzl, T. Reisinger, G. Schotz and M. Kastner 105

Silicon Dioxide Thin Films Doped with CdS Microcrystals Grown byMagnetron rf-Sputtering

A.G. Rolo, M.J.M. Gomes and M.S. Belsley 111

Contents xv

Effect of Static Electric Field on Luminescence Spectra ofQuantum-Size CdS, Pbl2 Particles and CdS Monocrystals

G.P. Yablonski, Yu.P. Rakovich and M.V. Artemyev 115

Fundamental Properties and Characterization

Exciton Tunneling Tuned by a Magnetic Field in Asymmetric DoubleQuantum Wells Based on CdTe (invited)

S. Haacke, I. Lawrence, H. Mariette and W.W. Riihle 121

Ultrafast Dynamics of Charge Carriers in ZnSe-Based II-VI QuantumWells and Epilayers (invited)

U.Neukirch 127

Optical Properties and Electronic Structure of ZnSe-BasedHeterostructures Grown by Low Temperature MOVPE (invited)

T. Cloitre, N. Briot, O. Briot, B. Gil and R.L. Aulombard 133

Characterization of II-VI Structures by Raman Spectroscopy (invited)D.R.T. Zahn, J. Geurts and W. Richter 141

Critical Thickness Determination of II-VI Semiconductors by RHEEDand X-Ray Diffraction

T. Reisinger, M.J. Kastner, K. Wolf, E. Steinkirchner, W. Hackl,H. Stanzl and W. Gebhardt 147

Dislocation and Strain Distributions in CdTe/GaAs (001) EpilayersR.I. Port, K. Durose, B.K. Tanner, J.E. Hails, J.S. Gough, M.G. Astles,M.C. Carmo and M.J. Soares 151

On the Mechanism of RHEED Oscillations in Molecular Beam Epitaxyof II-VI Compounds

J. Griesche, N. Hoffmann, M. Rabe and K. Jacobs 155

Comparison of the Structural Properties of Epitaxial ZnSe LayersGrown on GaAs (001) by MOVPE Using Different Selenium Precursors

J. Woitok, J. Platen, B. Wachtendorf, W. Taudt and M. Heuken 159

3-D Mapping of Strain and Defects in a ZnSe Epilayer Using a VariableEnergy Electron Beam

C. Trager-Cowan, A.M. Paterson, R.W. Martin, K.P. O'Donnell,J.T. Mullins, G. Horsburgh, K.A. Prior and B.C. Cavenett 163

Structure Study of the Hg^CdjTe VPE Layers Grown on CdTeMOCVD Substrates

N.V. Sochinskii, E. Dieguez, S. Bernardi, J.C. Soares and P. Franzosi 167

xvi II-VI Compounds and Semimagnetic Semiconductors

Electrical Characterization of MOVPE Grown Au/ZnSe/GaAsHeterostructures

M. Germain, R. Evrard, W. Taudt, B. Wachtendorf and M. Heuken 171

Low Resistivity Contacts Epitaxially Grown on n-Type CdTe UsingRare Earth Metals

B. Daudin and D. Brun 175

Photoluminescence of CdZnTe and CdZnSe Quantum Well WiresFabricated by Reactive Ion Etching

H. Straub, G. Brunthaler, W. Faschinger, G. Bauer, C. Gourgon,L.S. Dang, H. Mariette and C. Vieu 179

Excitonic Processes in Highly Excited ZnlxCdxSe/ZnSe and CdSe/ZnSeSingle and Multiple Quantum Wells

H. Grempel, J. Gutowski, O.S. Ferreira, H. Sitter, D. Hommel andG. Landwehr 183

Lateral Bandgap Modulation in CdTe / CdMgTe Heterostructures bySelective Ion-Implantation

G. Bacher, D. Tonnies, D. Eisert, A. Forchel, A. Waag, Th. Litz andG. Landwehr 187

Analytical Model for Calculating Exciton Energies as Measured inZn,.xCdxSe/ZnSe and ZnSe/ZnSxSe,.x Quantum Wells

A. Wulfes, J. Gutowski, E. Kurtz, D. Hommel, M. Scholl and M. Heuken 191

Zn!.xCdxSe Quantum Wells in ZnMgSeS.O. Ferreira, W. Faschinger, H. Sitter, R. Krump, G. Brunthaler andJ.T. Sadowski 195

Dephasing of Localized and Delocalized Excitons in DisorderedCdTe/(Cd,Mg)Te Multiple Quantum Wells

R. Hellmann, S.T. Cundiff, B. Kuhn-Heinrich, M. Koch, D.R. Yakovlev,J. Feldmann, A. Waag, E.O. Gobel and G. Landwehr 199

Optical Nonlinearities in ZnSe/ZnSSe HeterostructuresM. Umlauff, W. Langbein, H. Kalt, M. Scholl, J. Sollner, M. Heuken,H. Frost, A. Nebel and R. Beigang 203

Resonant Raman Scattering Near the E] Gap of HgTe/(Hg,Cd)TeHeterostructures

R. Atzmuller, M. Rosch, G. Schaack and C.R. Becker 207

Gain and Excitonic Nonlinearity in ZnSe-Based Quantum WellStructures

F. Kreller, M. Lowisch, J. Puls and F. Henneberger 211

Exciton Localization in ZnSe-Based Quantum WellsA. Schulzgen, E. Runge, F. Henneberger and R. Zimmermann 215

Contents xvii

Study of Biexciton in Thin ZnSe/ZnS Superlattices by Two-PhotonAbsorption Spectroscopy

K. Inoue, K. Yoshida, A. Mysyrowicz and A. Yamanaka 219

Reflectance Spectroscopy of Excitons in Biaxially Strained II-VIHeterostructures under Externally Applied Uniaxial Stress

F. Kubacki, J. Gutowski, P. Ruppert, D. Hommel and G. Landwehr 223

Polariton Effects in CdTe/(Cd,Mn)Te HeterostructuresV.P. Kochereshko, G.R. Pozina, E.L. Ivchenko, D.R. Yakovlev,W. Ossau, A. Waag and G. Landwehr 227

A Simple Model for Describing the Nonlinear Transmission Dynamicsof ZnSxSe!_x / ZnSySe^ (x > y) Waveguide Structures

M. Nagele, J. Gutowski, K.P. Geyzers and M. Heuken 231

Decrease of the Phase Stability in II-VI Epitaxial Layers due to StrainM. Grim, M. Hetterich, C. Klingshirn, A. Rosenauer and W. Gebhardt 235

Microspectroscopic Studies of CdSe Single Quantum Well LasersD.M. Bagnall, P.J. Wright, B. Cockayne and K.P. O'Donnell 239

Quantum Yield of Band-Edge Emission between 77 and 300 K ofUndoped and Nitrogen-Doped ZnSe Epilayers Grown by MOVPE

A.L. Gurskii, A.N. Gavrilenko, E.V. Lutsenko, G.P. Yablonskii,W. Taudt, B. Wachtendorf, J. Sollner, J. Schmoranzer and M. Heuken 243

Indium DX-Like Centers in MBE CdTe LayersD. Wasik, J. Przybytek, M. Baj, G. Karczewski, T. Wojtowicz,A. Zakrzewski and J. Kossut 247

Raman Scattering from Acceptor and Donor States in Nitrogen-Dopedp-Type Zinc Selenide

P.J. Boyce, J.J. Davies, D. Wolverson, K. Ohkawa and T. Mitsuyu 251

Strain Relaxation in (CdMg)Te Layers Grown by Molecular BeamEpitaxy

H. Heinke, F. Fischer, A. Waag, T. Litz, M. Korn and G. Landwehr 255

Absorption as Optical Access to Acceptor Concentrations andCompensation Mechanisms in ZnSe Epilayers

R. Heitz, B. Lummer, V. Kutzer, D. Wiesmann, A. Hoffmann, I. Broser,E. Kurtz, S. Einfeldt, J. Niirnberger, B. Jobst, D. Hommel andG. Landwehr 259

Luminescence Yield of SrS:Ce,Na PowdersB. Huttl, U. Troppenz, H. Venghaus, R.H. Mauch, J. Kreissl, A. Garcia,C. Fouassier, P. Benalloul, C. Barthou, J. Benoit, F. Gendron andC. Ronda 263

xviii II-VI Compounds and Semimagnetic Semiconductors

Vacancy Control of LPE and MOVPE Grown CdxHglxTe byAnnealing Techniques

D.T. Dutton, P. Capper, E. O'Keefe, P. Mackett, M. Hastings, S. Bartonand C.L. Jones 267

Investigations of the Hydrostatic Pressure Dependence of the Eo andEo+Ao Gap, the Excitonic Binding Energy and the Refractive Index ofEpitaxial ZnSe Layers

G.F. Schotz, E. Griebl, H. Stanzl, T. Reisinger and W. Gebhardt 271

Dynamics of Band Filling in Localized StatesT. Breitkopf, W. Petri, A. Reznitsky, H. Kalt, C. Klingshirn andK. O'Donnell 275

New Luminescence Band in II-VI Semiconductor Crystals with TreatedSurfaces

S.Yu. Verbin, R. Hellmann, S.D. Baranovskii, K. Ruckes, S.R. Grigorev,B.V. Novikov, E.O. Gobel and P. Thomas 279

Degenerate-Four-Wave-Mixing at the Nitrogen Acceptor BoundExciton in ZnSe Epilayers

A. Hoffmann, B. Lummer, V. Kutzer, L. Eckey, R. Heitz, I. Broser,E. Kurtz, J. Nilrnberger, B. Jobst, D. Hommel and G. Landwehr 283

Cyclotron Resonance in II-VI Compounds at High Magnetic Fields andtheir Bare and Polaron Masses

N. Miura, Y. Imanaka and H. Nojiri 287

All-Optical Material Characterization Method by the Application ofBistability in Luminescence

A. Kazlauskas, B. Ullrich, K. Misawa and T. Kobayashi 291

Spin Structure of Alloy-Trapped Excitons in CdS^Se, Solid SolutionsA. Reznitsky, A. Tsekoun, S. Verbin, S. Permogorov, E.L. Ivchenko andA.Yu. Kaminskii 297

Zeeman Spectroscopy on the Nitrogen Acceptor-Bound Exciton inEpitaxial ZnSe

W. Stadler, B.K. Meyer, D. Volm, D.M. Hofmann, A. Hoffmann,D. Wiesmann, R. Heitz, E. Kurtz and D. Hommel 303

Optically Detected Cyclotron Resonance Investigation of EpitaxiallyGrown ZnSe

D. Volm, W. Stadler, B.K. Meyer, W. Traudt, J. Sollner, M. Heuken,K. Wolf, T. Reisinger, L. Kurtz, D. Hommel and D.M. Hofmann 307

One-Mode Behaviour of the TO-Phonon Excitations for HgSe^S,Mixed Crystals

W. Szuszkiewicz, A.M. Witowski, K. Dybko, A. Mycielski,B. Witkowska, C. Julien and M. Balkanski 311

Contents xix

Resonant Effects in the Electron-Impurity Interaction Screening byPhonons

W. Szuszkiewicz, W. Bardyszewski, C. Julien and M. Balkanski 315

Phase Matched Second Harmonic Generation in ZnTe OpticalWaveguides

H.P. Wagner, S. Wittmann, H. Schmitzer and H. Stanzl 319

Electron Beam Pumped Room-Temperature Lasing of MOVPE-GrownZnSe

A.L. Gurskii, V.V. Gruzinskii, A.N. Gavrilenko, I.I. Kulak,A.I. Mitskovets, G.P. Yablonskii, M. Scholl and M. Heuken 323

Basic Processes in Devices

Mechanisms of Optical Gain in Epitaxial Structures of II-VICompounds (invited)

H. Kalt, M. Umlauff, W. Petri, F.A. Majumder and C. Klingshirn 329

Photorefractive Effect in CdTe Quantum Wells (invited)H. Haas, P. Gentile, N. Magnea, J.L. Pautrat, S. Gosselin, J.Y. Moison,Ph. Gravey and L.S. Dang 335

Excitons and Free Carrier Lasing in II-VI Quantum Wells (invited)R. Cingolani, L. Calcagnile, P. Prete, D. Greco, P.V. Guigno, R. Rinaldi,A. Franciosi, L. Sorba and L. Vanzetti 341

ZnMgSeTe Light Emitting DiodesR. Krump, S.O. Ferreira, W. Faschinger, G. Brunthaler and H. Sitter 349

Green-Yellow Light-Emitting Diodes on Zinc Telluride Obtained byLaser Doping

V.N. Iodko and A.K. Belyaeva 353

JOINT SESSIONEUROPEAN WORKSHOP ON II-VI COMPOUNDS

ANDINTERNATIONAL WORKSHOP ON SEMIMAGNETIC

(DILUTED MAGNETIC) SEMICONDUCTORS

Diode Lasers

Physics of Gain and Stimulated Emission in II-VI Diode Lasers (invited)A.V. Nurmikko, J. Ding, R.L. Gunshor and J. Han 363

xx II-VI Compounds and Semimagnetic Semiconductors

Developments in DMS

Recent Developments in Semimagnetic Semiconductors (invited)R.R. Galazka 371

Growth

Molecular Beam Epitaxy and Doping of (CdMgMn)Te Structures(invited)

A. Waag, F. Fischer, S. Oehling, H.-J. Lugauer, H. Heinke, Th. Litz,M. Schmitt and G. Landwehr 383

MOVPE of ZnSe Based Heterostructures for OptoelectronicApplications (invited)

M. Heuken 389

MBE Growth of High Mobility HgSe:Fe LayersTh. Widmer, D. Schikora, G. Hendorfer, S. Luther, W. Jantsch,K. Lischka and M.v.Ortenberg 395

The Mechanisms of MBE and ALE Growth of ZnTe on GaAs(lOO)Substrates

J. Sadowski 399

MBE Growth of Sulfur-Based Binary and Ternary Widegap II-VIAlloys Using Elemental Sulfur Source

A.W. Jia, T. Yamada, M. Kobayashi and A. Yoshikawa 403

MBE Growth of Heterostructures and Superlattices Containing MgTeW. Faschinger, G. Brunthaler, R. Krump, A. Darhuber, S. Ferreira andH.Sitter 407

MOCVD Growth of CdTe-CdMnTe MicrostructuresA. Lusson, V. Sallet, R. Druilhe, Y. Marfaing and R. Triboulet 411

Growth of CdS Layers by Hot-Wall Beam Epitaxy and theirApplication as Quasi-Substrates for Molecular Beam Epitaxy ofWurtzite CdS,.xSex

M. Hetterich, M. Griin, H. Gerlach and C. Klingshirn 415

Low-Pressure Metal-Organic-Vapor-Phase-Epitaxy (MOVPE) ofZnSSe with Different Precursors

J. Sollner, J. Schmoranzer, J. Woitok, H. Hamadeh and M. Heuken 419

Fabrication and X-Ray Diffractometry Investigation of CdTe/MnTeMultiple Quantum Wires

A.A. Darhuber, H. Straub, S.O. Ferreira, W. Faschinger, H. Sitter,E. Koppensteiner, G. Brunthaler and G. Bauer 423

Contents xxi

Spin Orientation Studies

Spin Beats and Magnetic Dynamics in II-VI Quantum Structures(invited)

J.J. Baumberg, S.A. Crooker, D.D. Awschalom and N. Samarth 429

Chemical Ordering: A New Direction in Diluted MagneticSemiconductors (invited)

B.T. Jonker, H.-Y. Wei, D. Prasad Beesabathina and L. Salamanca-Riba 435

Mn-Based III-V Diluted Magnetic (Semimagnetic) Semiconductors(invited)

H. Ohno 443

Contribution of Spins Clusters to Magnetization Relaxation in

D. Scalbert 451

Spin-Flip Raman Studies of a ZnSe / Zn,.xMnxSe Multiple QuantumWell Structure

P.J. Boyce, D. Wolverson, J.J. Davies and W. Heimbrodt 455

Magnetic Characterization of the Spin-Glass Phase in MnxCdi_xIn2Te4Solid Solutions

F. Palacio, J. Campo, V. Sagredo, L. Betancourt and J. Morales 459

Resonant Spin-Flip Raman Scattering on Donor-Bound Electrons inCdLjMnjTe/CdLyMgyTe Quantum Well Structures

R. Meyer, G. Schaack and A. Waag 463

Spin-Glass Like Behaviour in MnIn2_2xCr2xSe4 Single CrystalsV. Sagredo, H. Romero, L. Betancourt, J. Alvarez, G. Attolini andC. Pelosi 467

The Giant Spin Splittings of Exciton Spectra as a Tool for the Analysisof Semimagnetic Crystal Cd!_xMnxS Band Structure

V.G. Abramishvili, A.V. Komarov, S.M. Ryabchenko andYu.G. Semenov 471

Mn-Based II-VI, IV-VI and HIV DMS

Magnetic Properties of IV-VI Semimagnetic Semiconductors (invited)T. Story, R.R. Galazka, P.J.T. Eggenkamp, H.J.M. Swagten andW.J.M. De Jonge 477

Fabrication and Magneto-Optical Study of Zinc-Blende MnTe andMnTe/MnSb/MnTe Sandwiched Films (invited)

H. Akinaga and K. Ando 483

xxii II-VI Compounds and Semimagnetic Semiconductors

Excitonic Effects

Anisotropy of Excitonic Zeeman Splitting and the Relation to ExchangeEffects in Semimagnetic Heterostructures

B. Kuhn-Heinrich and W. Ossau 491

Magnetic Field Induced Effects on Excitonic Transitions inSemimagnetic Heterostructures

E. Deleporte 497

Magnetooptical Study of CdCoTeD. Coquillat, Yu.G. Rubo, A. El Ouazzani, A. Ribayrol, J.P. Lascarayand R. Triboulet 503

Magnetic Polarons and Polaron Dynamics

Survey on Magnetic Polarons (invited)C. Benoit a la Guillaume 511

Formation Dynamics of Magnetic Polarons (invited)T. Dietl, P. Peyla, W. Grieshaber and Y. Merle D'Aubigne 515

Picosecond Dynamics of Magnetic Polarons in Semimagnetic QuantumWell Structures (invited)

E.O. Gobel, R. Hellmann, G. Mackh, D.R. Yakovlev, W. Ossau,A. Waag and G. Landwehr 519

Exciton Localization by Magnetic Polarons and Alloy Fluctuations inCdMnTe (invited)

S. Takeyama 525

Magnetic Field Effect on Exciton Magnetic Polarons in Quantum Wellswith Semimagnetic Barriers (invited)

A. Kavokin and K. Kavokin 531

Effect of Exciton Localization on Magnetic Polaron Formation inMn-Based Heterostructures and Epilayes (invited)

D.R. Yakovlev, G. Mackh, W. Ossau, A. Waag and G. Landwehr 537

Influence of Bound Magnetic Polarons on Magnetic Properties ofMetallic n-Cd095Mn005Se

M. Sawicki, P. Glod and T. Dietl 543

Theory of Magnetic Polarons Formed by Holes in SemimagneticQuantum Wells

K.V. Kavokin and LA. Merkulov 545

3D Versus Quasi-2D Localized Magnetic PolaronsC. Benoit a la Guillaume 549

Contents xxiii

Magnetic Polarons in 2D Antiferromagnetic StructuresZ. Wilamowski, W. Jantsch, G. Hendorfer, H. Krenn, J. Sperl andW. Faschinger 553

Mobility of the Free Magnetic Polarons in SemimagneticSemiconductors

Yu.G. Semenov and V.A. Stephanovich 557

Resonant Multiple Mn + Spin-Flip Raman Scattering by VirtualMagnetic Polarons in Semimagnetic Quantum Wells

J. Stuhler, G. Schaack, M. Dahl, A. Waag, G. Landwehr, K.V. Kavokinand LA. Merkulov 561

Interfaces and Superlattices

Interface Characterization of CdTe-CdMnTe Structures (invited)J. Cibert, W. Grieshaber, J.A. Gaj, Y. Merle D'Aubigne and A. Wasiela 567

Molecular Beam Epitaxy and Structural Properties of PbTe/EuTeShort Period Superlattices (invited)

G. Springholz 573

Neutron Diffraction in DMS Quantum Wells: Strain Effects andInterlayer Magnetic Correlations (invited)

T.M. Giebultowicz 579

Tunneling, New Exchange Effects

Tunnelling Processes in Asymmetric II-VI-Double Quantum WellStructures Containing Manganese (invited)

K. Hieke, W. Heimbrodt, Th. Pier, H.-E. Gumlich, W.W. Rtthle,J.E. Nicholls and B. Lunn 587

Beyond the VCA and MFA for Extended States in DMS (invited)J. Tworzydlo 593

New p-d Exchange Interaction in Cr-Based Diluted MagneticSemiconductors (invited)

A. Twardowski 599

Quasilocalization and Mesoscopic Effects

Quasilocalization of Above Barrier States in Diluted MagneticSemiconductor Heterostructures (invited)

H. Luo, M. Dobrowolska and J.K. Furdyna 607

xxiv II-VI Compounds and Semimagnetic Semiconductors

Characterization and Related Studies

Magneto-Optical Study of Interface Diffusion in CdTe/CdlxMnxTeMultiple Quantum Wells

S. Kuroda, K. Kojima, K. Kobayashi, A. Saito, K. Takita, K. Uchida andN. Miura 615

Magnetic and Electrical Properties of a New SemimagneticSemiconductor Hg^Mnj/Te^ySe^

K.R. Krylov, N.K. Lerinman, A.I. Ponomarev, L.D. Sabirzjanova,N.G. Shelushinina, N.P. Gavaleshko and P.D. Marjanchuk 619

Ferromagnetic Clusters in In!.xMnxAsA. Van Esch, W. Van Roy, J. De Boeck, I. Francois, H. Bender,G. Borghs, L. Van Bockstal, R. Bogaerts and F. Herlach 623

Magnetic Acceptor Complex in Mn-Doped GaAs: A New Type ofExchange Center

X.C. Liu, D. Heiman, J. Hao and K.C. Hsieh 627

Electronic Structure of d-Metals Impurities in AIVBVi SemiconductorsG.V. Lashkarev, M.V. Radchenko, V.V. Asotskiy, A.V. Brodovoy,A.I. Mirets and O.I. Tananaeva 631

Excited-State Absorption - A Powerful Tool to Study the ElectronicStructure of Cobalt Based DMS

A. Ehlert, J. Dreyhsig and H.-E. Gumlich 635

Investigations on the p-d Hybridization in Zinc-Blende MnTe andMnSe

P.R. Bressler and H.-E. Gumlich 639

Temperature and Magnetic Field Dependence of the Free and BoundExciton Luminescence in CdTe/CdMnTe Quantum Well

J.P. Lascaray, A. Kavokin, Yu. Rubo, A. Ribayrol, N. Paganotto,D. Coquillat and J. Cibert 643

Magneto-Optical Studies of the Type I / Type II Crossover inCdTe/Cd,.xMnxTe Superlattices in Magnetic Fields up to 45 Tesla

H.H. Cheng, R.J. Nicholas, M.J. Lawless, D.E. Ashenford and B. Lunn 647

Exchange Interaction in HgCdMnTeW. Herbst, F. Geist, H. Pascher, M. Baran, T. Dietl, W. Dobrowolski andR. Szymczak 653

Uranium Diluted in IV-VI CompoundsS. Isber, C. Fau, S. Charar, M. Averous and Z. Golacki 657

Magnetic Porperties Studies of Pb!_xEuxSeS. Isber, S. Charar, C. Fau, M. Averous and Z. Golacki 663

Contents xxv

EPR Investigations of EuTe/PbTe SuperlatticesZ. Wilamowski, W. Jantsch and G. Springholz 669

Diluted Magnetic SemimetalsZ. Wilamowski, T. Story and W. Jantsch 673

EPR Characterization of DMS SuperlatticesZ. Wilamowski, W. Jantsch, G. Springholz and W. Faschinger 677

Diluted Magnetic Semiconductors Based on Transition Metals otherthan Manganese

A.K. Bhattacharjee 681

Magnetic Characterization of MBE Grown Cd,.xMnxTe StructuresM. Sawicki, T. Dietl, G. Karczewski, T. Wojtowicz and J. Kossut 685

Magnetic Phase Diagram of Highly Concentrated Cdi.xMnxTe(0.4 < x < 1.0)

J. Pietruczanis, W. Mac, A. Twardowski, G. Karczewski, A. Zakrzewski,E. Janik, T. Wojtowicz and J. Kossut 687

Core Level Spectroscopy of II-Mn-VI Compounds by LuminscenceExcitation with Synchrotron Radiation

H.-Ch. Mertins and H.-E. Gumlich 691

Luminescence Decay of Fe2+-Centers in Zn,.xFexS and Zn!_xFexSe DMSB. Litzenburger, U.W. Pohl, M. Poschenrieder and H.-E. Gumlich 695

Fast Decaying Photoluminescent Transition between the d MultipletLevels of the Cobalt Centre in Zn,.xCoxSe DMS

J. Dreyhsig, B. Litzenburger, Th. Pier and H.-E. Gumlich 699

Lattice Dynamics for Hg,.xMxSe (M - Transition Metal Impurity:Mn, Fe, Co)

W. Szuszkiewicz, E. Dynowska, J. Gorecka, J. Kachniarz,S. Miotkowska, B. Witkowska, M. Jouanne, C. Julien and M. Balkanski 703

Electronic Band Structure of Cubic Hg,_xFexSW. Szuszkiewicz, E. Guziewicz, B.J. Kowalski, B.A. Orlowski andB. Witkowska 707

Raman Spectroscopy of Cubic Hgj.xFexSW. Szuszkiewicz, B. Witkowska, M. Jouanne and M. Balkanski 711

Fourier Analysis of the Shubnikov-De Haas Oscillations in(Cd1.x.yZnyMnx)3As2 Below 1 K

W. Lubczynski, J. Cisowski, P. Gee, J. Singleton, D.K. Maude andJ.C. Portal 715

d-d Exchange Interaction in Mn-Alloyed H3-V2 CompoundsH. Bednarski, J. Cisowski, J.C. Portal, J. Voiron and D. Schmitt 719

xxvi II-VI Compounds and Semimagnetic Semiconductors

Magnetooptical Investigations of PbEuTeF. Geist, C. Mejia-Garcia, H. Pascher, G. Bauer and G. Springholz 723

Peciuliarities of Band Structure in the Hg^FejSe AlloyS.M. Komirenko, Yu.G. Semenov, A.E. Belyaev, and Yu.S. Ryabchenko 727

Determination of the Local Exchange Fields with the Use ofMeasurement of the Magnetoresistance Anisotropy

A.E. Belyaev, F.V. Kirichenko and Yu.G. Semenov 731

Subpicosecond Optical Dephasing in Diluted Magnetic SemiconductorsS.T. Cundiff, R.H. Hellmann, M. Koch, D.R. Yakovlev, A. Waag,E.O. Gobel and G. Landwehr 735

Magneto-Optical Study of the Exciton Localization in ZnSe/ZnMnSeQuantum Well Structures

V.V. Rossin, J. Puls and F. Henneberger 739

Magneto-Optical Studies of Coulomb Effects and Band Parameters inZnCdSe-ZnSe Multi-Quantum Well Structures

J. Puls, V.V. Rossin and F. Henneberger 743

Gd3+ EPR Study of the Magnetic System Gd2Se3 + xGdSeS. Pokrzywnicki, E. Machowska and M. Duczmal 747

Carrier-Ion and Ion-Ion Exchange Interactions inCd,_xMnxTe/Cd,_yMgyTe Heterostructures

F. Hamdani, T. Ruf, A. Waag, T. Litz and G. Landwehr 751

Magneto-Optical Characterization of Wide-Gap (II,Mn)VI QuantumWell Structures

W. Heimbrodt, V. Weinhold, N. Hoffmann and J. Griesche 755

Temperature Dependence of Recombination Times in CdTe(CdMnTe)Asymmetric Double Quantum Wells

Th. Pier, B. Henninger, S. Abdallah, H.-E. Gumlich, K. Hieke,W. Heimbrodt, J.E. Nicholls and B. Lunn 759

Magneto-Optical Anisotropy in Semimagnetic Materials: The Interplayof Strain and Magnetic Field

C. Santos, D. Suisky, P. Enders, F. Neugebauer, M. Hartmann,J. Roseler, W. Heimbrodt and R. Knoch 763

Coherent Raman Scattering from Electronic Transitions inCdTe/MnTe Superlattices

B. Miiller, R. Rupprecht, H. Pascher, W. Faschinger, H. Sitter, G. Bauerand A.K. Ramdas 767

Magnetooptical Studies of Band Structure Parameters in HgTe/CdTeSuperlattices

M. von TruchseB, V. Latussek, C.R. Becker and E. Batke 771

Contents xxvii

Exciton Magnetic Polarons in Semimagnetic Quantum Wells withNonmagnetic Barriers

G. Mackh, W. Ossau, D.R. Yakovlev, R. Hellmann, E.O. Gobel,A. Waag and G. Landwehr 775

Superexchange in Diluted Magnetic SemiconductorsJ. Blinowski, P. Kacman and J.A. Majewski 779

Investigation of the Mn2+-Mn2+ Interaction in Semimagnetic QuantumWells by Means of Raman Spectroscopy

J. Stuhler, G. Schaak, M. Dahl, A. Waag, G. Landwehr, K.V. Kavokinand LA. Merkulov 783

Author Index 787

Keyword Index 795