Volume 96, Number 6, December 2011
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||30 November 2011|
Tunnelling between edge states of a 2D topological insulator and a Fermi liquid lead through a quantum dot
Department of Physcis, Hong Kong University of Science and Technology - Hong Kong, PRC
Accepted: 27 October 2011
In this paper we study a non-equilibrium resonant tunnelling problem where a non-interacting quantum dot is connected to two leads, one being the edge of an interacting 2D topological insulator (Luttinger liquid) and the other being a usual Fermi liquid. We show that the current passing through the system can be expressed in terms of a non-equilibrium local single-particle Green's function of the Luttinger liquid lead which can be analysed using standard bosonization-renormalization group (RG) technique. In particular, some exact results can be extracted in the small-bias limit with repulsive electron-electron interaction. A simple formula which captures the qualitative feature of the I-V relation over the whole temperature and voltage bias range is proposed and studied.
PACS: 72.10.Bg – General formulation of transport theory / 73.40.Gk – Tunneling / 71.10.Pm – Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.)
© EPLA, 2011
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.