Baturina, Tatyana I. and Mironov, A. Yu. and Vinokur, V. M. and Baklanov, M. R. and Strunk, C. (2008) Hyperactivated Resistance in TiN Films on the Insulating Side of the Disorder-Driven Superconductor-Insulator Transition. JETP LETTERS, 88 (11). pp. 752-757. ISSN 0021-3640, 1090-6487
Full text not available from this repository. (Request a copy)Abstract
We investigate the insulating phase that forms in a titanium nitride film in a close vicinity of the disorder-driven superconductor-insulator transition. In zero magnetic field the temperature dependence of the resistance reveals a sequence of distinct regimes upon decreasing temperature crossing over from logarithmic to activated behavior with the variable-range hopping squeezing in between. In perpendicular magnetic fields below 2 T, the thermally activated regime retains at intermediate temperatures, whereas at ultralow temperatures, the resistance increases faster than that of the thermally activated type. This indicates a change of the mechanism of the conductivity. We find that at higher magnetic fields the thermally activated behavior disappears and the magnetoresistive isotherms saturate towards the value close to quantum resistance h/e(2).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SMALL JOSEPHSON-JUNCTIONS; 2-DIMENSIONAL ARRAYS; CHARGE; LOCALIZATION; PHASE; FLUCTUATIONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Oct 2020 09:31 |
| Last Modified: | 14 Oct 2020 09:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29934 |
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