Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 71, Issue 8, Pages 1832-1835Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.71.1832
Keywords
alpha-(BEDT-TTF)(2)I-3; superconductor; narrow gap semiconductor; charge order; uniaxial strain
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We demonstrate that an organic conductor alpha-(BEDT-TTF)(2)I-3 exhibits various types of transport phenomena when compressed along some crystal axes. When the sample is strained along the a-axis, the low-temperature electronic state changes from a charge-ordered insulating state under small strains to a narrow gap semiconductor state under large strains. In between these two states, there appears a superconducting state with a T-c of about 7 K. When compressed along the b-axis, on the other hand, this material behaves as a typical quasi-two-dimensional metal with large Fermi surfaces.
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