Magnetic-field and temperature dependence of the energy gap in InN nanobelt

K. Aravind; Y. W. Su; D. S. Chung; Watson Kuo; C. S. Wu; K. S. Chang-Liao; K. H. Chen; L. C. Chen; C. D. Chen

doi:10.1063/1.3691830

Magnetic-field and temperature dependence of the energy gap in InN nanobelt

K. Aravind, Y. W. Su, D. S. Chung, Watson Kuo, C. S. Wu, K. S. Chang-Liao, K. H. Chen, L. C. Chen, C. D. Chen

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We present tunneling measurements on an InN nanobelt which shows signatures of superconductivity. Superconducting transition takes place at temperature of 1.3K and the critical magnetic field is measured to be about 5.5kGs. The energy gap extrapolated to absolute temperature is about 110μeV. As the magnetic field is decreased to cross the critical magnetic field, the device shows a huge zero-bias magnetoresistance ratio of about 400%. This is attributed to the suppression of quasiparticle subgap tunneling in the presence of superconductivity. The measured magnetic-field and temperature dependence of the superconducting gap agree well with the reported dependences for conventional metallic superconductors.

Original language	English
Article number	012155
Journal	AIP Advances
Volume	2
Issue number	1
DOIs	https://doi.org/10.1063/1.3691830
Publication status	Published - 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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title = "Magnetic-field and temperature dependence of the energy gap in InN nanobelt",

abstract = "We present tunneling measurements on an InN nanobelt which shows signatures of superconductivity. Superconducting transition takes place at temperature of 1.3K and the critical magnetic field is measured to be about 5.5kGs. The energy gap extrapolated to absolute temperature is about 110μeV. As the magnetic field is decreased to cross the critical magnetic field, the device shows a huge zero-bias magnetoresistance ratio of about 400%. This is attributed to the suppression of quasiparticle subgap tunneling in the presence of superconductivity. The measured magnetic-field and temperature dependence of the superconducting gap agree well with the reported dependences for conventional metallic superconductors.",

author = "K. Aravind and Su, {Y. W.} and Chung, {D. S.} and Watson Kuo and Wu, {C. S.} and Chang-Liao, {K. S.} and Chen, {K. H.} and Chen, {L. C.} and Chen, {C. D.}",

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AU - Aravind, K.

AU - Su, Y. W.

AU - Chung, D. S.

AU - Kuo, Watson

AU - Wu, C. S.

AU - Chang-Liao, K. S.

AU - Chen, K. H.

AU - Chen, L. C.

AU - Chen, C. D.

PY - 2012

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AB - We present tunneling measurements on an InN nanobelt which shows signatures of superconductivity. Superconducting transition takes place at temperature of 1.3K and the critical magnetic field is measured to be about 5.5kGs. The energy gap extrapolated to absolute temperature is about 110μeV. As the magnetic field is decreased to cross the critical magnetic field, the device shows a huge zero-bias magnetoresistance ratio of about 400%. This is attributed to the suppression of quasiparticle subgap tunneling in the presence of superconductivity. The measured magnetic-field and temperature dependence of the superconducting gap agree well with the reported dependences for conventional metallic superconductors.

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