Interlayer Charge Disproportionation in the Layered Organic Superconductor κH−(DMEDO−TSeF)2[Au(CN)4](THF) with Polar Dielectric Insulating Layers
Tadashi Kawamoto, Takehiko Mori, David Graf, James S. Brooks, Yamaguchi Takahide, Shinya Uji, Takashi Shirahata, Tatsuro Imakubo
DOI 10.1103/PhysRevLett.109.147005 · Physical Review Letters
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Abstract
We report the molecular dipole effect on conduction electrons in the title superconductor. The angular-dependent magnetoresistance has a peak for fields nearly parallel to the conducting layer, and the peak width scales as the field component perpendicular to the layer, indicating incoherent interlayer transport. However, two closed Fermi surfaces are observed in quantum oscillation. Accordingly, crystallographically independent layers have different charge densities in a bulk single crystal. The electric dipole of tetrahydrofuran gives rise to interlayer charge disproportionation.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κL-(DMEDO-TSeF)2[Au(CN)4](THF) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | onset |
| κH-(DMEDO-TSeF)2[Au(CN)4](THF) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure not reported | onset |
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