Location of gap nodes in the organic superconductors {kappa}-(ET){sub 2}Cu(NCS){sub 2} and {kappa}-(ET){sub 2}Cu[N(CN){sub 2}Br determined by magnetocalorimetry.
We report specific-heat measurements of the organic superconductors {kappa}-(ET){sub 2}Cu(NCS){sub 2} and {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br. When the magnetic field is rotated in the highly conducting planes at low temperature (T = 0.4 K), we observe clear oscillations of specific heat which have a strong fourfold component. The observed strong field and temperature dependence of this fourfold component identifies it as originating from nodes in the superconducting energy gap which point along the in-plane crystal axes (d{sub xy} symmetry).
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; EPSRC (UK)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 985125
- Report Number(s):
- ANL/MSD/JA-64472
- Journal Information:
- Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: Jul. 16, 2010 Vol. 82; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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