Topological insulators

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Z 2 invariance stable to continuous change of band parameters even number of crossings odd number of crossings
(non-exotic) materials classes of topological insulators • Graphene Kane and Mele, 2005, spin quantum Hall effect • 2d topological insulators Zhang and co., 2006, HgTe quantum wells (see later) • 3d topological insulators (Zhang and Co) BiSe, BiTe, BiSb … yet to be experimentally confirmed first 3d experimental TI • other special materials structures …
Page 1 and 2: http://www.physik.uni-regensburg.de
Page 3 and 4: :outline: • mesoscopics for pedes
Page 5 and 6: How much current per spin flows in
Page 7 and 8: conductance quantization B. J. van
Page 9 and 10: integer quantum Hall effect: topolo
Page 11 and 12: topological nature of the integer q
Page 13 and 14: topological insulators edge states
Page 15: Time reversal points spin degenerac
Page 19 and 20: HgTe/CdTe quantum wells CdTe CdTe C
Page 21 and 22: experimental evidence of TI states
Page 23 and 24: magnetism of the TI edge states in
Page 29: Conclusion topological insulators a

Topological insulators

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