Z2-classification of localization properties in graphene

Ken Ichiro Imura, Yoshio Kuramoto, Kentaro Nomura

研究成果: Conference contribution

抄録

We propose a simple criterion to identify the weak localization (WL) property of graphene in the presence or absence of inter-valley scattering, intrinsic and extrinsic (Rashba) spin-orbit interactions. We show that it is determined by the parity of the number Ns of activated (pseudo-)spins, e.g., sub-lattice, valley and real spins, in the system. If Ns is even (odd), the system shows WL (anti-localization). If a mass term exists, and is not invariant under the relevant time-reversal operation, then unitary behavior (absence of WL correction) is predicted. We discuss some implications of our results to other Dirac fermion systems such as HgTe/HgCdTe quantum well.

本文言語English
ホスト出版物のタイトルInternational Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009
ページ871-874
ページ数4
DOI
出版ステータスPublished - 2012 12月 1
イベントInternational Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009 - Rhodes, Greece
継続期間: 2009 9月 292009 10月 4

出版物シリーズ

名前AIP Conference Proceedings
1504
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherInternational Conference of Computational Methods in Sciences and Engineering 2009, ICCMSE 2009
国/地域Greece
CityRhodes
Period09/9/2909/10/4

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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