English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/103162
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Magnetoelectric coupling and surface anomalous Hall effect

AuthorsSouza, Ivo
Issue Date2012
CitationSO-TT (2012)
AbstractIn this presentation I will review some recent developments in the theory of the linear magnetoelectric (ME) effect in solids. Special emphasis will be put on the orbital-magnetization response to an applied electric field. Remarkably, this contribution contains a term which is purely geometric, in that it can be expressed solely in terms of the Berry potential of the Bloch states in k-space. Like the Berry-phase electronic polarization in crystals, this term is only well-defined modulo a quantum of indeterminacy. While the bulk polarization produces a bound surface charge, the geometric ME response gives rise to a surface anomalous Hall conductance, which in strong topological insulators amounts to half a quantum of conductance. In conventional magnetoelectrics the geometric term is not quantized, and gives only part of the orbital ME response. Ab initio calculations of the linear ME coefficient will be presented for both topological (Bi2Se3) and conventional (Cr2O3) insulators.
DescriptionTrabajo presentado al: "Spin-orbit-driven transverse transport phenomena" celebrado en Rhöndorf (Alemania) del 3 al 6 de Diciembre de 2012.
Appears in Collections:(CFM) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.