Electron Localization Induced by Disordered Anions in an Organic Conductor.
Inorg Chem
; 63(9): 4196-4203, 2024 Mar 04.
Article
in En
| MEDLINE
| ID: mdl-38377386
ABSTRACT
We report on a new organic conductor κâ³-(ET)2Cu[N(CN)2]Br (κâ³-Br), which is the first polymorph of an organic superconductor κ-(ET)2Cu[N(CN)2]Br (κ-Br), where ET denotes bis(ethylenedithio)tetrathiafulvalene. κâ³-Br has a similar κ-type arrangement of ET molecules to κ-Br, but, in contrast to the orthorhombic κ-Br, which has ordered polyanion chains, presents a monoclinic crystal structure with disordered polymeric anion chains. To elucidate the electronic state of κâ³-Br, we performed band calculations as well as transport, magnetic, and optical measurements. The calculated band dispersion, magnitude of electron correlation, and room-temperature optical conductivity spectra of κâ³-Br were comparable to those of κ-Br. Despite these similarities, the κâ³-Br salt exhibited a semiconducting behavior. The electron spin resonance and Raman spectroscopies indicated that there is neither magnetic nor charge order in κâ³-Br, suggesting the occurrence of Anderson localization due to disordered anion layers.
Full text:
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Database:
MEDLINE
Language:
En
Journal:
Inorg Chem
Year:
2024
Type:
Article
Affiliation country:
Japan