journal article·2012-03-01Open access

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

AIP Advances· Volume 2· Issue 1

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.
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Research context

OpenAlex topics: GaN-based semiconductor devices and materials · Semiconductor Quantum Structures and Devices · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Tsing Hua University 1 Department of Engineering and System Science, , Hsinchu 300, Taiwan

Institute of Physics 2 , Academia Sinica, Nankang 115, Taipei, Taiwan

National Chung Hsing University 3 Department of Physics, , Taichung 402, Taiwan

National Chang-Hua University of Education 4 Department of Physics, , ChangHua 500, Taiwan

Institute of Atomic and Molecular Sciences 5 , Academia Sinica, Taipei 106, Taiwan

National Taiwan University 6 Center for Condensed Matter Sciences, , Taipei 106, Taiwan

National Cheng Kung University 7 Department of Physics, , Tainan 701, Taiwan

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