Electron Localization near the Mott Transition in the Organic Superconductor κ−(BEDT−TTF)2Cu[N(CN)2]Br
K. Sano, T. Sasaki, N. Yoneyama, N. Kobayashi
DOI 10.1103/PhysRevLett.104.217003 · Physical Review Letters
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Abstract
The effect of disorder on the electronic properties near the Mott transition is studied in an organic superconductor κ−(BEDT−TTF)2Cu[N(CN)2]Br, which is systematically irradiated by x rays. We observe that x ray irradiation causes Anderson-type electron localization due to molecular disorder. The resistivity at low temperatures demonstrates variable range hopping conduction with Coulomb interaction. The experimental results show clearly that the electron localization by disorder is enhanced by the Coulomb interaction near the Mott transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κ-(BEDT-TTF)2Cu[N(CN)2]Br Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | onset |
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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