Evolution of superconductivity from a charge-density-wave ground state in pressurized (Per)2[ Au(mnt)2]D. Graf1, J. S. Brooks1, 2, M. Almeida2, J. C. Dias2, S. Uji3, T. Terashima3 and M. Kimata3
1 Physics/NHMFL Florida State University - Tallahassee, FL 32310, USA
2 Instituto Tecnológico e Nuclear/CFMCUL - Estrada Nacional No. 10, P-2686-953 Sacavém, Portugal, EU
3 National Institute of Materials Science - Tsukuba, Ibaraki, 305-0003 Japan
received 18 November 2008; accepted in final form 23 December 2008; published January 2009
published online 30 January 2009
By suppressing the charge density wave ground state in the highly one-dimensional organic conductor (Per)2[ Au(mnt)2] with quasi-hydrostatic pressure, a superconducting (SC) phase is established above a pressure of 5 kbar. The onset of superconductivity is approximately 300 mK and the upper critical field (perpendicular to the perylene stacking axis) is 50 mT. The new CDW-SC phase diagram is compared with pressure-induced density wave-SC transitions in other organic compounds.
71.20.Rv - Polymers and organic compounds.
71.45.Lr - Charge-density-wave systems.
74.62.Fj - Pressure effects.
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