Issue |
EPL
Volume 104, Number 2, October 2013
|
|
---|---|---|
Article Number | 27006 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/104/27006 | |
Published online | 18 November 2013 |
Single Dirac-cone state and quantum Hall effects in a honeycomb structure
Department of Applied Physics, University of Tokyo - Hongo 7-3-1, 113-8656, Japan
Received: 10 August 2013
Accepted: 16 October 2013
A honeycomb lattice system has four types of Dirac electrons corresponding to the spin and valley degrees of freedom. We consider a state that contains only one type of massless electrons and three types of massive ones, which we call the single Dirac-cone state. We analyze quantum Hall (QH) effects in this state. We make a detailed investigation of the Chern and spin-Chern numbers. We make clear the origin of unconventional QH effects discovered in graphene. We also show that the single Dirac-cone state may have arbitrary large spin-Chern numbers in magnetic field. Such a state will be generated in antiferromagnetic transition-metal oxides under electric field or in silicene with antiferromagnetic order under electric field.
PACS: 73.43.-f – Quantum Hall effects / 73.43.Cd – Theory and modeling / 81.05.ue – Graphene
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.