The helical gap in interacting Rashba wires at low electron densities

Reference : The helical gap in interacting Rashba wires at low electron densities


	Document type :	E-prints/Working papers : Already available on another site
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/26875

Title :	The helical gap in interacting Rashba wires at low electron densities
Language :	English
Author, co-author :	Schmidt, Thomas [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Pedder, Christopher [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Publication date :	Apr-2016
Peer reviewed :	No
Abstract :	[en] Rashba spin-orbit coupling and a magnetic field perpendicular to the Rashba axis have been predicted to open a partial gap ("helical gap") in the energy spectrum of noninteracting or weakly interacting one-dimensional quantum wires. By comparing kinetic energy and Coulomb energy we show that this gap opening typically occurs at low electron densities where the Coulomb energy dominates. To address this strongly correlated limit, we investigate Rashba wires using Wigner crystal theory. We find that the helical gap exists even in the limit of strong interactions but its dependence on electron density differs significantly from the weakly interacting case. In particular, we find that the critical magnetic field for opening the gap becomes an oscillatory function of electron density.
Funders :	Fonds National de la Recherche - FnR
Permalink :	http://hdl.handle.net/10993/26875
source URL :	http://arxiv.org/abs/1604.07720

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Open access	schmidt16.pdf		Author preprint	476.04 kB	View/Open

All documents in ORBi^lu are protected by a user license.