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Transport via double constrictions in integer and fractional topological insulators

Huang, C.-W., Carr, S.T., Gutman, D., Shimshoni, E., Mirlin, A.D. (2013) Transport via double constrictions in integer and fractional topological insulators. Physical Review B - Condensed Matter and Materials Physics, 88 (12). p. 125134. ISSN 10980121 (ISSN). (doi:10.1103/PhysRevB.88.125134) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:49625)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
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Abstract

We study transport properties of the helical edge states of two-dimensional integer and fractional topological insulators via double constrictions. Such constrictions couple the upper and lower edges of the sample and can be made and tuned by adding side gates to the system. Using renormalization group and duality mapping, we analyze phase diagrams and transport properties in each of these cases. Most interesting is the case of two constrictions tuned to resonance, where we obtain Kondo behavior, with a tunable Kondo temperature. Moving away from resonance gives the possibility of a metal-insulator transition at some finite detuning. For integer topological insulators, this physics is predicted to occur for realistic interaction strengths and gives a conductance G with two temperature T scales where the sign of dG/dT changes, one being related to the Kondo temperature while the other is related to the detuning. © 2013 American Physical Society.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevB.88.125134
Additional information: Unmapped bibliographic data: C7 - 125134 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Phys. Rev. B Condens. Matter Mater. Phys. [Field not mapped to EPrints] AD - Department of Physics, Bar-Ilan University, Ramat Gan 52900, Israel [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Institut für Theorie der Kondensierten Materie, DFG Center for Functional Nanostructures, Karlsruher Institut für Technologie, 76128 Karlsruhe, Germany [Field not mapped to EPrints] AD - Institut für Nanotechnologie, Karlsruher Institut für Technologie, 76021 Karlsruhe, Germany [Field not mapped to EPrints] AD - Petersburg Nuclear Physics Institute, 188300 St. Petersburg, Russian Federation [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Physics of Quantum Materials
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Sam Carr
Date Deposited: 21 Jul 2015 15:37 UTC
Last Modified: 01 Aug 2019 10:39 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49625 (The current URI for this page, for reference purposes)
Carr, S.T.: https://orcid.org/0000-0001-9995-4944
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