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Title: Superconducting properties in tantalum decorated three-dimensional graphene and carbon structures

Abstract

We present here the results on superconducting properties in tantalum thin films (100 nm thick) deposited on three-dimensional graphene (3DG) and carbon structures. A superconducting transition is observed in both composite thin films with a superconducting transition temperature of 1.2 K and 1.0 K, respectively. We have further measured the magnetoresistance at various temperatures and differential resistance dV/dI at different magnetic fields in these two composite thin films. In both samples, a much large critical magnetic field (∼2 T) is observed and this critical magnetic field shows linear temperature dependence. Finally, an anomalously large cooling effect was observed in the differential resistance measurements in our 3DG-tantalum device when the sample turns superconducting. Our results may have important implications in flexible superconducting electronic device applications.

Authors:
 [1];  [2]; ; ; ;  [1];  [1];  [3];  [4]
  1. Sandia National Laboratories, P.O. Box 5800, MS 1086, Albuquerque, New Mexico 87185 (United States)
  2. (Spain)
  3. (United States)
  4. Laboratorio de Bajas Temperaturas, Universidad de Salamanca, E-37008 Salamanca (Spain)
Publication Date:
OSTI Identifier:
22314520
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GRAPHENE; MAGNETIC FIELDS; MAGNETORESISTANCE; SUPERCONDUCTORS; TANTALUM; THIN FILMS; THREE-DIMENSIONAL CALCULATIONS

Citation Formats

Cobaleda, Cayetano S. F., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov, Laboratorio de Bajas Temperaturas, Universidad de Salamanca, E-37008 Salamanca, Xiao, Xiaoyin, Burckel, D. Bruce, Polsky, Ronen, Pan, W., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov, Huang, Duanni, Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, and Diez, Enrique. Superconducting properties in tantalum decorated three-dimensional graphene and carbon structures. United States: N. p., 2014. Web. doi:10.1063/1.4892574.
Cobaleda, Cayetano S. F., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov, Laboratorio de Bajas Temperaturas, Universidad de Salamanca, E-37008 Salamanca, Xiao, Xiaoyin, Burckel, D. Bruce, Polsky, Ronen, Pan, W., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov, Huang, Duanni, Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, & Diez, Enrique. Superconducting properties in tantalum decorated three-dimensional graphene and carbon structures. United States. doi:10.1063/1.4892574.
Cobaleda, Cayetano S. F., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov, Laboratorio de Bajas Temperaturas, Universidad de Salamanca, E-37008 Salamanca, Xiao, Xiaoyin, Burckel, D. Bruce, Polsky, Ronen, Pan, W., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov, Huang, Duanni, Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, and Diez, Enrique. Mon . "Superconducting properties in tantalum decorated three-dimensional graphene and carbon structures". United States. doi:10.1063/1.4892574.
@article{osti_22314520,
title = {Superconducting properties in tantalum decorated three-dimensional graphene and carbon structures},
author = {Cobaleda, Cayetano S. F., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov and Laboratorio de Bajas Temperaturas, Universidad de Salamanca, E-37008 Salamanca and Xiao, Xiaoyin and Burckel, D. Bruce and Polsky, Ronen and Pan, W., E-mail: ccobaleda@usal.es, E-mail: wpan@sandia.gov and Huang, Duanni and Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106 and Diez, Enrique},
abstractNote = {We present here the results on superconducting properties in tantalum thin films (100 nm thick) deposited on three-dimensional graphene (3DG) and carbon structures. A superconducting transition is observed in both composite thin films with a superconducting transition temperature of 1.2 K and 1.0 K, respectively. We have further measured the magnetoresistance at various temperatures and differential resistance dV/dI at different magnetic fields in these two composite thin films. In both samples, a much large critical magnetic field (∼2 T) is observed and this critical magnetic field shows linear temperature dependence. Finally, an anomalously large cooling effect was observed in the differential resistance measurements in our 3DG-tantalum device when the sample turns superconducting. Our results may have important implications in flexible superconducting electronic device applications.},
doi = {10.1063/1.4892574},
journal = {Applied Physics Letters},
number = 5,
volume = 105,
place = {United States},
year = {Mon Aug 04 00:00:00 EDT 2014},
month = {Mon Aug 04 00:00:00 EDT 2014}
}