Role of layer packing for the electronic properties of the organic superconductor (BEDT−TTF)2Ag(CF3)4(TCE)
Michaela Altmeyer, Roser Valentí, Harald O. Jeschke
DOI 10.1103/PhysRevB.91.245137 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The charge-transfer compound (BEDT−TTF)2Ag(CF3)4(TCE) crystallizes in three polymorphs with different alternating layers: While a phase with a κ packing motif has a low superconducting transition temperature of Tc=2.6K, two phases with higher Tc of 9.5 and 11 K are multilayered structures consisting of α′ and κ layers. We investigate these three systems within density functional theory and find that the α′ layer shows different degrees of charge order for the two κ−α′ systems and directly influences the electronic behavior of the conducting κ layer. We discuss the origin of the distinct behavior of the three polymorphs and propose a minimal tight-binding Hamiltonian for the description of these systems based on projective molecular Wannier functions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2Ag(CF3)4(TCE) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure not reported | unknown |
| (BEDT-TTF)2Ag(CF3)4(TCE) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.5 | Pressure not reported | unknown |
| (BEDT-TTF)2Ag(CF3)4(TCE) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | unknown |
Similar papers
Pressure-induced insulating state in an organic superconductor
similarity 0.93J. Hagel et al.
Source status unknown — claims are unverified
Thermal Activation between Landau Levels in the Organic Superconductor β′′−(BEDT−TTF)2SF5CH2CF2SO3
similarity 0.92M.-S. Nam et al.
Source status unknown — claims are unverified
Pairing due to Spin Fluctuations in Layered Organic Superconductors
similarity 0.92Jörg Schmalian
Source status unknown — claims are unverified
Elastic study of antiferromagnetic fluctuations in the layered organic superconductors κ−(BEDT−TTF)2X
similarity 0.92K. Frikach et al.
Source status unknown — claims are unverified
Highly anisotropic superconductivity in the organic conductor α-(BEDT−TTF)2NH4Hg(SCN)4
similarity 0.92H. Taniguchi et al.
Source status unknown — claims are unverified
Magnetic penetration depth in the organic superconductor κ-[BEDT-TTF]2Cu[NCS]2
similarity 0.92D. R. Harshman et al.
Source status unknown — claims are unverified