Anisotropy in the bc plane of the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 revealed by scanning tunneling microscopy and atomic force microscopy
S. Yoon, W. F. Smith, M. Yoo, A. L. deLozanne, R. Fainchtein, T. J. Kistenmacher, S. T. D’Arcangelis, D. O. Cowan
DOI 10.1103/PhysRevB.47.4802 · Physical Review B
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Abstract
A scanning tunneling microscope and an atomic-force microscope were used to study the surface structure of the bc plane of a κ-(BEDT-TTF)2Cu(NCS)2 crystal. The individual bis(ethylene- dithio)tetrathiafulvalene (BEDT-TTF) molecules were resolved and dislocations and steps were observed. Structural height differences of the order of 0.1 Å with respect to the bc plane are observed between the cation molecules, giving rise to an electron density of states that is less isotropic than previously thought.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.4 | Pressure unresolved | unknown |
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | onset |
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