Please use this identifier to cite or link to this item: https://doi.org/10.1166/jctn.2010.1632
Title: The roles of potential symmetry in transport properties of superconducting quantum point contacts
Authors: Nurbawono, A.
Feng, Y.P. 
Zhang, C. 
Keywords: Andreev reflection
Quantum point contact
Superconductor
Issue Date: Nov-2010
Citation: Nurbawono, A., Feng, Y.P., Zhang, C. (2010-11). The roles of potential symmetry in transport properties of superconducting quantum point contacts. Journal of Computational and Theoretical Nanoscience 7 (11) : 2448-2452. ScholarBank@NUS Repository. https://doi.org/10.1166/jctn.2010.1632
Abstract: We present a theoretical transport analysis for a hybrid quantum point contact which consists of a quantum dot connected to two superconducting reservoir electrodes. The analysis focuses on the effects of symmetry of the potential drops across the device on the transport properties of the system. Common beliefs normally presume the potential drops to be trivial for such systems, henceforth the analysis is often based on perfect symmetry assumption. In contrary, we predicted that the details of potential drops have very significant effects in the current-voltage (I-V) characteristics of the system. This is because slight perturbations on the symmetry of potential drops can dramatically alter the transport characteristics, both in linear and non-linear regimes. Particularly when the coupling strengths between the quantum dot and the leads are weak, the system exhibits ultra-high sensitivity with respect to potential symmetry variations, and this phenomenon turns out to be robust regardless of the coupling strength asymmetry. Copyright © 2010 American Scientific Publishers.
Source Title: Journal of Computational and Theoretical Nanoscience
URI: http://scholarbank.nus.edu.sg/handle/10635/98315
ISSN: 15461955
DOI: 10.1166/jctn.2010.1632
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

1
checked on Jun 22, 2018

WEB OF SCIENCETM
Citations

1
checked on May 23, 2018

Page view(s)

24
checked on Mar 11, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.