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

Authors :
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
Source :
AIP Advances, Vol 2, Iss 1, Pp 012155-012155-6 (2012)
Publication Year :
2012
Publisher :
AIP Publishing LLC, 2012.

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.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
2
Issue :
1
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.845f82bcf7254dd2a234b009bbce2fa4
Document Type :
article
Full Text :
https://doi.org/10.1063/1.3691830