Abstract
We report an antiferromagnetic (AF) ordering at ambient pressure and a superconducting transition under pressure for (ethylenedithio)tetrathiafulvalene], which has a two-dimensional electronic system with quasi-one-dimensional triangular spin lattice. At ambient pressure, AF ordering was detected at by NMR, subsequent to two structural phase transitions at 230 and 190 K. Under hydrostatic pressures, metallic behavior appeared above ∼1.1 GPa, and a superconducting transition (maximum onset at ∼1.3 GPa) was observed up to 2.2 GPa. Superconductivity was also found under -axis strain, which reduced , but was absent under -axis strain which increased .
- Received 30 July 2015
- Revised 22 June 2016
DOI:https://doi.org/10.1103/PhysRevB.94.020503
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