Fermiology and superconductivity studies on the non-tetrachalcogenafulvalene-structured organic superconductor β-(BDA−TTP)2SbF6
E. S. Choi, E. Jobilong, A. Wade, E. Goetz, J. S. Brooks, J. Yamada, T. Mizutani, T. Kinoshita, M. Tokumoto
DOI 10.1103/PhysRevB.67.174511 · Physical Review B
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Abstract
The quantum oscillatory effect and superconductivity in a non-tetrachalcogenafulvalene (TCF) -structure-based organic superconductor β−(BDA−TTP)2SbF6 are studied. Here the Shubnikov–de Haas effect and angular-dependent magnetoresistance oscillations are observed. The oscillation frequency associated with a cylindrical Fermi surface is found to be about 4050 T, which is also verified by a tunnel diode oscillator (TDO) measurement. The upper critical-field (Hc2) measurement in a tilted magnetic field and the TDO measurement in the mixed state reveal a highly anisotropic superconducting nature in this material. We compare the physical properties of β−(BDA−TTP)2SbF6 with typical TCF-structure-based quasi-two-dimensional organic conductors. A notable feature of the β−(BDA−TTP)2SbF6 superconductor is a large value of effective cyclotron mass mc*=12.4±1.1me, which is the largest yet found in an organic superconductor. A possible origin of the enhanced effective mass and its relation to the superconductivity are briefly discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BDA-TTP)2SbF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.5 | Pressure not reported | unknown |
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