Destruction of localized electron pairs above the magnetic-field-driven superconductor-insulator transition in amorphous In-O films
The field-induced superconductivity-destroying quantum transition in amorphous indium oxide films are investigated at low temperatures down to 30 mK. It is found that, on the high-field side of the transition, the magnetoresistance reaches a maximum and the phase can be insulating as well as metallic. With further increase of the magnetic field the resistance of the film drops and in the high-field limit approaches the resistance value at the transition point, so that at high fields the metallic phase occurs for both cases. We give a qualitative account of this behavior in terms of field-induced destruction of localized electron pairs.
PACS numbers74.25.Jb 74.76.Db 74.70.Ad
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- 3.S. M. Girvin, M. Wallin, M.-C. Cha et al., Prog. Theor. Phys. Suppl. 107, 135 (1992).Google Scholar
- 5.D. Shahar and Z. Ovadyahu, Phys. Rev. B 46, 10917 (1992).Google Scholar
- 6.V. F. Gantmakher, M. V. Golubkov, J. G. S. Lok, and A. K. Geim, JETP Lett. 82, 951 (1996).Google Scholar
- 9.K. Kim and H.-L. Lee, Phys. Rev. B 54, 13152 (1996).Google Scholar
- 11.V. F. Gantmakher, M. V. Golubkov, V. T. Dolgopolov, G. E. Tsydynzhapov, and A. A. Shashkin, http://xxx.lanl.gov/abs/cond-mat/9806244.
- 14.V. F. Gantmakher, V. N. Zverev, V. M. Teplinskii, and O. I. Barkalov, Zh. Éksp. Teor. Fiz. 103, 1460 (1993) [JETP 76, 714 (1993].Google Scholar