Superconductivity at 27 K in tetragonal FeSe under high pressure
Abstract
A huge enhancement of the superconducting transition temperature Tc was observed in a tetragonal FeSe superconductor under high pressure. The onset temperature was as high as 27K at 1.48GPa and the pressure coefficient showed an extremely high value of 9.1K/GPa. The upper critical field Hc2 was estimated to be ∼72T at 1.48GPa. Because of the high Hc2, the FeSe system can be applied to superconducting wire rods.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2008
- DOI:
- arXiv:
- arXiv:0807.4315
- Bibcode:
- 2008ApPhL..93o2505M
- Keywords:
-
- 74.62.Fj;
- 62.50.-p;
- 74.70.Ad;
- 74.10.+v;
- 74.25.Op;
- Pressure effects;
- High-pressure effects in solids and liquids;
- Metals;
- alloys and binary compounds;
- Occurrence potential candidates;
- Mixed states critical fields and surface sheaths;
- Condensed Matter - Superconductivity;
- Condensed Matter - Materials Science
- E-Print:
- 8 pages, 6 figures