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

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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 languageEnglish
Article number012155
JournalAIP Advances
Volume2
Issue number1
DOIs
Publication statusPublished - 2012 Dec 1

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Aravind, K., Su, Y. W., Chung, D. S., Kuo, W., Wu, C. S., Chang-Liao, K. S., ... Chen, C. D. (2012). Magnetic-field and temperature dependence of the energy gap in InN nanobelt. AIP Advances, 2(1), [012155]. https://doi.org/10.1063/1.3691830