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ResercherID: Y. Hatsugai
投稿者 : hatsugai 投稿日時： 2015-02-25 10:54:05 (115 ヒット)
Flat bands in Weaire-Thorpe model and silicene is discussed and the paper is now published in New J. Phys. as a special issue article for silicene.. Electronic structure of silicene is algebraically described which is qualitatively consistent with the first principle results. Silicene is not a simple generalization of graphene but is featured by the multi-orbital character. Generic arguments for the flat band we have proposed before is nicely applied. [arXiv:1410.7885]
投稿者 : hatsugai 投稿日時： 2015-02-19 00:54:08 (124 ヒット)
Massive/massless Dirac cones with/without tilting for 2D semiconductors are described and now the paper has been published in Phys. Rev.B. 4D notations are used for compact derivations of the Landau levels of Dirac cones, extended chiral symmetry and generalized Aharonov-Casher type shifted zero modes. [arXiv:1410.6250] This is a kind of general description of the narrow gap semiconductor as the gapped Dirac cones with tilting. I am sure it can be useful.
投稿者 : hatsugai 投稿日時： 2015-02-13 19:03:59 (49 ヒット)
The paper "Disentangled topological numbers by a purification of entangled mixed states for non-interacting fermion systems" by Takahiro Fukui and YH is now on the net and accepted for publication in JPSJ. Have a look at arXiv:1501.07031