Fermi surface studies in the magnetic-field-induced superconductor λ−(BETS)2FeCl4
S. Uji, H. Shinagawa, C. Terakura, T. Terashima, T. Yakabe, Y. Terai, M. Tokumoto, A. Kobayashi, H. Tanaka, H. Kobayashi
DOI 10.1103/PhysRevB.64.024531 · Physical Review B
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Abstract
Measurements of the Shubnikov–de Haas (SdH) and angular-dependent magnetoresistance oscillations were performed to study the Fermi surface for a magnetic-field-induced superconductor λ−(BETS)2FeCl4. We found two SdH oscillations ascribed to the minimum and maximum cross-sectional areas of corrugated cylindrical Fermi surface, which are estimated to be 14% and 17% of the first Brillouin zone, respectively. The mass of the conduction electrons is 4.1 m0, suggesting the enhancement due to many-body effects. Assuming a parabolic energy band, we obtain a Fermi energy of ∼20 meV and an interlayer transfer integral of ∼1 meV.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BETS)2FeCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | onset |
| (BETS)2GaCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure not reported | unknown |
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