Gapless Fermi surfaces of anisotropic multiband superconductors in a magnetic field
We propose that a new state with a fully gapless Fermi surface appears in quasi-2D multiband superconductors in magnetic field applied parallel to the plane. It is characterized by a paramagnetic moment caused by a finite density of states on the open Fermi surface. We calculate thermodynamic and ma...
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| Published in | Physical review letters Vol. 98; no. 8; p. 087004 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
23.02.2007
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| Online Access | Get more information |
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| Summary: | We propose that a new state with a fully gapless Fermi surface appears in quasi-2D multiband superconductors in magnetic field applied parallel to the plane. It is characterized by a paramagnetic moment caused by a finite density of states on the open Fermi surface. We calculate thermodynamic and magnetic properties of the gapless state for both s-wave and d-wave cases, and discuss the details of the first order metamagnetic phase transition that accompanies the appearance of the new phase in s-wave superconductors. We suggest possible experiments to detect this state both in the s-wave (2-H NbSe2) and d-wave (CeCoIn5) superconductors. |
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| ISSN: | 0031-9007 |
| DOI: | 10.1103/physrevlett.98.087004 |