| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Heat Transport in Graphene Ferromagnet-Insulator-Superconductor Junctions |
| LI Xiao-Wei
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1School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai'an 223300
2State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050
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| Cite this article: |
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LI Xiao-Wei 2011 Chin. Phys. Lett. 28 047401 |
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Abstract We study heat transport in a graphene ferromagnet-insulator-superconducting junction. It is found that the thermal conductance of the graphene ferromagnet-insulator-superconductor (FIS) junction is an oscillatory function of the barrier strength χ in the thin−barrier limit. The gate potential U0 decreases the amplitude of thermal conductance oscillation. Both the amplitude and phase of the thermal conductance oscillation varies with the exchange energy Eh. The thermal conductance of a graphene FIS junction displays the usual exponential dependence on temperature, reflecting the s-wave symmetry of superconducting graphene.
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| Keywords:
74.45.+c
74.78.-w
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Received: 25 May 2010
Published: 29 March 2011
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| PACS: |
74.45.+c
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(Proximity effects; Andreev reflection; SN and SNS junctions)
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74.78.-w
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(Superconducting films and low-dimensional structures)
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