OBSERVATION OF A NONMAGNETIC HARD GAP IN AMORPHOUS IN/INOX FILMS IN THE HOPPING REGIME
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- Title
- OBSERVATION OF A NONMAGNETIC HARD GAP IN AMORPHOUS IN/INOX FILMS IN THE HOPPING REGIME
- Authors
- KIM, JJ; LEE, HJ
- Date Issued
- 1993-05-03
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- We measured low temperature conduction characteristics of amorphous indium/indium-oxide composite films deep in the insulating regime. Upon lowering temperature, resistance crosses over from an Efros-Shklovskii variable-range-hopping conduction to a simple activation conduction, with parameters in good agreement with the picture of hardening of a parabolic Coulomb gap near the Fermi level. In contrast to the previous observations in magnetic materials, however, the hard gap in our films is extremely insensitive to a magnetic field, which strongly indicates a nonmagnetic nature of the hard gap.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12399
- DOI
- 10.1103/PhysRevLett.70.2798
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 70, no. 18, page. 2798 - 2801, 1993-05-03
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