edoc

Nonlocal spectroscopy of Andreev bound states

Schindele, J. and Baumgartner, A. and Maurand, R. and Weiss, M. and Schönenberger, C.. (2014) Nonlocal spectroscopy of Andreev bound states. Physical review. B, Condensed matter and materials physics, Vol. 89, H. 4 , 045422.

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/dok/A6338966

Downloads: Statistics Overview

Abstract

We experimentally investigate Andreev bound states (ABSs) in a carbon nanotube quantum dot (QD) connected to a superconducting Nb lead (S). A weakly coupled normal metal contact acts as a tunnel probe that measures the energy dispersion of the ABSs. Moreover, we study the response of the ABS to nonlocal transport processes, namely, Cooper pair splitting and elastic co-tunnelling, which are enabled by a second QD fabricated on the same nanotube on the opposite side of S. We find an appreciable nonlocal conductance with a rich structure, including a sign reversal at the ground-state transition from the ABS singlet to a degenerate magnetic doublet. We describe our device by a simple rate equation model that captures the key features of our observations and demonstrates that the sign of the nonlocal conductance is a measure for the charge distribution of the ABS, given by the respective Bogoliubov-de Gennes amplitudes u and v.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Schindele, Jens Oliver and Baumgartner, Andreas and Maurand, Romain and Weiss, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0163-1829
Note:Publication type according to Uni Basel Research Database: Journal article
Related URLs:
Identification Number:
Last Modified:06 Feb 2015 09:59
Deposited On:06 Feb 2015 09:59

Repository Staff Only: item control page