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

K. A. Aravind | Zendy; Yan Su | Zendy; Duck Young Chung | Zendy; Watson Kuo | Zendy; Cen-Shawn Wu | Zendy; Kuei-Shu Chang-Liao | Zendy; KueiHsien Chen | Zendy; LiChyong Chen | Zendy; C. D. Chen | Zendy

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

Author(s) -

K. A. Aravind,

Yan Su,

Duck Young Chung,

Watson Kuo,

Cen-Shawn Wu,

Kuei-Shu Chang-Liao,

KueiHsien Chen,

LiChyong Chen,

C. D. Chen

Publication year - 2012

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.3691830

Subject(s) - condensed matter physics , superconductivity , magnetoresistance , quasiparticle , magnetic field , critical field , quantum tunnelling , materials science , field (mathematics) , band gap , physics , mathematics , quantum mechanics , pure mathematics

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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