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Ettingshausen effect due to Majorana modes

Hou, C.-Y and Shtengel, K. and Refael, G. and Goldbart, P. M. (2012) Ettingshausen effect due to Majorana modes. New Journal of Physics, 14 (10). Art. No. 105005. ISSN 1367-2630. doi:10.1088/1367-2630/14/10/105005.

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The presence of Majorana zero-energy modes at vortex cores in a topological superconductor implies that each vortex carries an extra entropy s_0, given by (k_B/2)ln 2, that is independent of temperature. By utilizing this special property of Majorana modes, the edges of a topological superconductor can be cooled (or heated) by the motion of the vortices across the edges. As vortices flow in the transverse direction with respect to an external imposed supercurrent, due to the Lorentz force, a thermoelectric effect analogous to the Ettingshausen effect is expected to occur between opposing edges. We propose an experiment to observe this thermoelectric effect, which could directly probe the intrinsic entropy of Majorana zero-energy modes.

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Additional Information:© 2012 Institute of Physics Publishing Ltd and Deutsche Physikalische Gesellschaft. Content from this work may be used under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 21 May 2012. Published 3 October 2012. The authors would like to thank A R Akhmerov, F Hassler, R M Lutchyn and C Nayak for helpful discussions. CYH and KS were supported in part by the DARPA-QuEST program. KS was supported in part by NSF award DMR-0748925. PMG was supported in part by NSF awards DMR-0906780 and DMR-1207026. KS, GR and PMG are grateful for the hospitality of the Aspen Center for Physics where this work was conceived. CYH would like to acknowledge the hospitality of Microsoft Station Q. GR is grateful for support from DARPA.
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Defense Advanced Research Projects Agency (DARPA)-QuEST ProgramUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Subject Keywords:Quantum gases, liquids and solids; Superconductivity; Statistical physics and nonlinear systems
Issue or Number:10
Classification Code:PACS: 74.25.Fy, 74.78.Fk, 74.25.Op, 05.30.Pr
Record Number:CaltechAUTHORS:20121108-091556878
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Official Citation:Ettingshausen effect due to Majorana modes C-Y Hou et al 2012 New J. Phys. 14 105005
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35349
Deposited By: Ruth Sustaita
Deposited On:08 Nov 2012 17:37
Last Modified:12 Jul 2022 19:52

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