Field-Induced Metal-Insulator Transition in a Two-Dimensional Organic Superconductor
Journal Article
·
· Physical Review Letters
- and others
The quasi-two-dimensional organic superconductor {beta}''-( BEDT-TTF){sub 2}SF{sub 5} CH{sub 2}CF {sub 2}SO{sub 3} (T{sub c}{approx}4.4 K) shows very strong Shubnikov--de Haas (SdH) oscillations which are superimposed on a highly anomalous steady background magnetoresistance, R{sub b} . Comparison with de Haas--van Alphen oscillations allows a reliable estimate of R{sub b} which is crucial for the correct extraction of the SdH signal. At low temperatures and high magnetic fields insulating behavior evolves. The magnetoresistance data violate Kohler's rule, i.e., cannot be described within the framework of semiclassical transport theory, but converge onto a universal curve appropriate for dynamical scaling at a metal-insulator transition.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205804
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 86; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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