Topological Insulators - GDR Meso

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2D Dirac Matter A B H = ~v F ( y .k x x .k y ) <strong>Topological</strong> <strong>Insulators</strong> surface states ‣ strong spin-orbit : momentum-spin locking ➡ real spin in Dirac equation (Zeeman effect, spintronic) ‣ no additional degeneracy : a single cone ‣ 1 cone + real spin : strong constraint by T-symmetry ‣ 2 independant cones (Nielsen-Ninomyia Theorem) ‣ necessity to include hexagonal warping at high doping H W = 2 z(k 3 + + k 3 ) k ± = k x ± ik y Graphene ‣ pseudo spin (AB) in Dirac ‣ 4-fold degeneracy : valley x spin ‣ T-symmetry relates both cones also : α-(BEDT-TTF)2I3 under pressure A. Kobayashi et al., Phys. Rev. B 84,075450 (2011) mardi 3 janvier 12
Diffusion of 2D Dirac states • Transport in metallic regime : k F 1/l e (high doping) k F 1/l e F l e mardi 3 janvier 12
Page 1 and 2: Some Transport properties of Topolo
Page 3 and 4: Surface States of 3D Topological In
Page 5 and 6: Transport measurement on TI Bi2Se3
Page 7 and 8: Transport measurement on TI Bi2Se3
Page 9 and 10: Transport measurement on TI ‣ Bi2
Page 11: 2D Dirac Matter A B H = ~v F ( y .k
Page 15 and 16: Study of diffusion of 2D Dirac stat
Page 17 and 18: (Weak) Localization • Probability
Page 19 and 20: (Weak) Localization / Quantum trans
Page 21 and 22: Weak localization : Universality cl
Page 23 and 24: Weak localization : Universality cl
Page 25 and 26: Anderson Univ. classes and Topologi
Page 27 and 28: Anderson Univ. classes and Topologi
Page 29 and 30: Anisotropic Scattering of Dirac sta
Page 31 and 32: Anisotropic Scattering of Dirac sta
Page 33: Conclusion ‣ New playground for u

Topological Insulators - GDR Meso

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