CONDUCTIVITY AND INDUCED SUPERCONDUCTIVITY IN...
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A.Yu. Kasumov 1,2 , K.Tsukagoshi 1,3 , M. Kawamura 1 , T. Kobayashi 1 , Y.Aoyagi 1,4 , V.T. Volkov 2 , Yu.A. Kasumov 2 , D.V. Klinov 5 , M. Kociak 6 , P.-E. Roche 6 , R. Deblock 6 , S. Guéron 6 , H. Bouchiat 6 1. RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan. 2. Institute of Microelectronics Technology RAS, Chernogolovka, Moscow district, 142432, Russia. 3. PRESTO, JST, Honcho 4-1-8, Kawaguchi, Saitama, Japan. 4. Department of Information Processing, Tokyo Institute of Technology, Nagatsuda 4259, Midori, Yokohama, Kanagawa 226-8502, Japan. 5. Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Miklukho-Maklaya 16/10, Moscow 117871, Russia. 6. Laboratoire de Physique des Solides UMR 8502 - Universite Paris-Sud, Bat. 510, 91405 Orsay cedex, France. CONDUCTIVITY AND INDUCED SUPERCONDUCTIVITY IN DNA
Transcript of CONDUCTIVITY AND INDUCED SUPERCONDUCTIVITY IN...
A.Yu. Kasumov1,2, K.Tsukagoshi1,3, M. Kawamura1, T. Kobayashi1, Y.Aoyagi1,4,V.T. Volkov2, Yu.A. Kasumov2, D.V. Klinov5, M. Kociak6, P.-E. Roche6, R. Deblock6, S. Guéron6,
H. Bouchiat6
1. RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.2. Institute of Microelectronics Technology RAS, Chernogolovka, Moscow district, 142432, Russia.3. PRESTO, JST, Honcho 4-1-8, Kawaguchi, Saitama, Japan.4. Department of Information Processing, Tokyo Institute of Technology, Nagatsuda 4259, Midori, Yokohama,
Kanagawa 226-8502, Japan.5. Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Miklukho-Maklaya 16/10, Moscow 117871,
Russia.6. Laboratoire de Physique des Solides UMR 8502 - Universite Paris-Sud, Bat. 510, 91405 Orsay cedex,
France.
CONDUCTIVITY AND INDUCEDSUPERCONDUCTIVITY IN DNA
Limits for Molecular Electronics
Von Neuman restriction:Emin = (ln2)kT, T = 300 K
Heisenberg principlerestriction:Emin= h / td
Limit for room temperature molecular electronics
Allowed region formolecular electronics
Pentium transistor
Nanotube transistor (IBM)
Josephson transistor
Q=50 W/cm2 - maxheat removalN=1012/cm2 - density of devices
Q/Np=50 W
Lg(P), P - power [W]
lg(td), td - delay [s]-15 -12 -9 -6 -3 0
-6
-9
-12
-15
neuron
Transmission electron microscopy imageof Pt/C DNA replica from untreated micashadowed at 6 degrees, indicating athickness of 1nm.
Kasumov et al., APL, 2004
Schematic picture of compressed DNA
DNAs - INSULATORS !
without pentylamine treatment
DNAs - CONDUCTORS !
with pentylamine treatment
Individual DNA and a rope ofDNAs combed across the slit
current scales of SRM (voltage was up to 0.23 V)profiles of DNAs
AFM (left) and SRM (right) pictures of DNA molecules
Two leveled plastic tubes connected to outlets of a peristaltic pump (in order to control the flowing rate)are fixed in the sample holder touching the surface of a sample. The flowing DNA solution is running outfrom one tube into the other with a velocity of the order of 1-2 cm/sec
Combing of DNA molecules
Th
e re
aso
n f
or
the
con
du
civi
ty is
lon
g r
ang
e co
rrel
atio
ns
inst
ruct
ure
of
DN
A;
Car
pen
a et
al.,
Nat
ure
, 20
02
Low
tem
pera
ture
con
duct
ivity
of
DN
As
Sca
ling
beh
avio
r o
f th
ed
iffe
ren
tial
res
ista
nce
in
the
tem
per
atu
re r
ang
eb
etw
een
0.1
K a
nd
1 K
an
dvo
ltag
e ra
ng
e b
etw
een
0.0
2an
d 0
.4 m
V.
Bia
s d
epen
den
ce o
f th
ed
iffe
ren
tial
res
ista
nce
fo
rd
iffe
ren
t te
mp
erat
ure
sb
etw
een
0.1
an
d 1
K.
No
teth
e as
ymm
etry
of
the
curv
es a
bo
ve 0
.4 m
V.
Th
eex
cita
tio
n c
urr
ent
is 0
.1 n
A.
Mica
λ-DNA
Bilayer Re/C superconductor with Tc=1 K
DNA molecules aligned by solution flow on Re-C electrodes separated by 500 nm gap deposited on mica substrate
Pt electrodes
AFM image of molecules on contactsMolecules between contacts
Some essential points:Surface preparation (height of molecules = 2nm)Height of electrodes (no more than 3 nm)
DNA molecules prepared in this way have resistances~100 kΩ per molecule.Treatment by enzymes suppresses DNAs conductivitycompletely !
DNA molecules between metallic electrodes
Contacts Re/C Tc ~ 1KNomber of molecules between contacts ~ 10
Linear transport :Resistance drop at T<TcDisappears in magnetic field
Kasumov et al. Science 2001
Electron pairs may penetrate into DNA with length of the order of 1 micronwhich demonstrate the coherent character of the transport.
Proximity induced superconductivity in DNA molecules
1314151617
5
10
15
20
25
-1,0 -0,5 0,0 0,5 1,0708090
100110
?0H=0.9 T
?0H=0 T
DNA2
dV/d
I (k?
)?0H=0.8 T
?0H=0 TDNA1
dV
/dI
(k?)
?0H=0 T
?0H=1 T
DNA3
dV/d
I (k?
)
V (mV)
Voltage dependence of thedifferential resistancemeasured at 50 mK inmagnetic fields of 0, 0.2, 0.4,0.6, 0.8, and 1 T for 3 DNAsamples. Thesemeasurements were donewith an ac excitation currentof 1 nA at 30 Hz.
Non-linear Transport in DNAs
Conclusions
• DNA is conductive in the case of native thicknessonly!
• Proximity induced superconductivity in DNA is dueto long range coherent transport
Fabrication and Studyof sub-10nm
Gate Controlled MolecularJosephson Junction
Super-conductor
Super-conductor
DNA molecule1-5 nm
Gate
Perspective
Deposition and TEM image of metallofullerens
Actual HRTEMimage of sampleGd1 (Gd@C82molecular dimerbetweenelectrodes).
Schematic picture ofthe molecular dimerbetweensuperconductingelectrodes. The red dotssymbolize the Gd atomsinside the fullerene cage.
Sketch representing themetallofullerenemolecules deposition.
