Topological Insulators - GDR Meso

Warping + (in plane) Zeeman
P. Adroguer, D. Carpentier, J. Cayssol and E. Orignac, unpublished
H 0 = ~v F ẑ ⇥ (~ ⇥ ~ k) +V (~r ) H W = 2
z k 3 + + k 3
k ± = k x ± ik y
Zeeman field :
H Z = gµ B ~ . ~ B
‣ in plane without warping : no effect on transport
‣ + Warping : modifies the scattering amplitude, and the transport
k min
kmax
No Warping
Fermi Surface
Increasing B
Zeeman Field
+ Warping
Zeeman field = Constant Gauge field = Shift of momenta
Transport unchanged
Zeeman field ≠ Constant Gauge field
Transport modified
Modification of UCF, weak loc, etc
mardi 3 janvier 12