Topological Insulators - GDR Meso

Study of diffusion of 2D Dirac states
• Transport in metallic regime :
k F
1/l e
(high doping)
k F
1/l e
F
l e
weak (anti-)localization
(long wires)
0.2
0
-0.2
-0.4
-0.6
-0.8
2.10 - 5
B
690 mK
-2000 0 2000
conductance
universal conductance fluctuations
(short wire)
Conductance, same sample, different spins config.
12.4
12.2
12
11.8
11.6
11.4
11.2
11
10.8
0 20 40 60 80 100
Flux Through the Sample
mardi 3 janvier 12