UHV-taugliche Pumpen
Transcript of UHV-taugliche Pumpen
![Page 1: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/1.jpg)
UHV-taugliche Pumpen
![Page 2: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/2.jpg)
UHV-taugliche Pumpen
![Page 3: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/3.jpg)
UHV-taugliche Pumpen
![Page 4: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/4.jpg)
3D: Kristallstruktur
![Page 5: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/5.jpg)
3D: Miller-Indices
![Page 6: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/6.jpg)
2D: ideale Oberfläche, 5 Bravais Netze
p:
c:
![Page 7: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/7.jpg)
2D: ideale Oberfläche, 5 Bravais Netze
![Page 8: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/8.jpg)
2D: ideale Oberfläche, 5 Bravais Netze
![Page 9: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/9.jpg)
Beschreibung idealen Oberfläche
fcc Kristall (z.B. Cu, Ni, Ag, Pt)
oberste Lage
zweite Lage
![Page 10: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/10.jpg)
Beschreibung idealen Oberfläche
fcc Kristall (z.B. Cu, Ni, Ag, Pt)
![Page 11: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/11.jpg)
Exemplarische Typen von Grenzflächen
![Page 12: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/12.jpg)
Abweichung von der idealen Oberfläche
![Page 13: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/13.jpg)
Abweichung von der idealen Oberfläche
(Oberflächeneinheitszelle geändert)
(Oberflächeneinheitszelle unverändert)
![Page 14: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/14.jpg)
Relaxation von Oberflächen
![Page 15: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/15.jpg)
Adsorptionsplätze
![Page 16: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/16.jpg)
Abweichung von der idealen Oberfläche
![Page 17: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/17.jpg)
• Modify coupling by intermediate layer of atomic oxygen
• Preparation via surfactant growth:
– dosing O2 (1200 L) at annealed Cu(100) (600K)
adsorption of 0.5 ML of atomic oxygen
– surfactant assisted film growth: O floats to top of Ni or Co film
O O
Tailoring the magnetic coupling
Cu(100)
clean Cu (√22√2) R45° O/Cu(100) missing row
c(22) O/Co/Cu(100)
Co on O/Cu(100)
• C. Sorg et al., Phys. Rev. B 73, 064409 (2006) • R. Nünthel et al., Surf. Sci. 531, 53-67 (2003) • J. Lindner et al., Surf. Sci. Lett. 523, L65-L69 (2003)
![Page 18: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/18.jpg)
Adsorbate und Überstrukturen
![Page 19: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/19.jpg)
Adsorbate und Überstrukturen
![Page 20: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/20.jpg)
Halbleiter: dangling bonds entscheidend
Rekonstruktion
![Page 21: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/21.jpg)
![Page 22: UHV-taugliche Pumpen](https://reader031.fdocuments.net/reader031/viewer/2022020620/61e4067723993312f5112fea/html5/thumbnails/22.jpg)