New Results for Superconductivity in κ-(BEDT-TTF)2Cu(NCS)2 When an Applied Magnetic Field is Aligned Parallel to the Conducting Planes

Martin, C.; Cho, K.; Mihut, I.; Coffey, T.; Agosta, C. C.; Tozer, S. W.; Radovan, H. A.; Palm, E. C.; Murphy, T. P.; Schlueter, J. A.

doi:10.1007/s10909-006-9190-z

New Results for Superconductivity in κ-(BEDT-TTF)₂Cu(NCS)₂ When an Applied Magnetic Field is Aligned Parallel to the Conducting Planes

Journal Article · Sat Jan 20 04:00:00 EST 2007 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/s10909-006-9190-z· OSTI ID:1079790

Martin, C. ^[1]; Cho, K.; Mihut, I.; Coffey, T.; Agosta, C. C.; Tozer, S. W.; Radovan, H. A.; Palm, E. C.; Murphy, T. P.; Schlueter, J. A.

Clark Univeristy

Using a Tunnel Diode Oscillator technique, we have measured the effect of a parallel magnetic field on the in-plane rf penetration depths in organic [α- (BEDT-TTF)₂NH₄Hg(SCN)₄ and κ-(BEDT-TTF)₂Cu(NCS)₂] and heavy fermion (CeCoIn₅) superconductors. We show that in this particular geometry, the effects due to vortex activity are minimized. The penetration depth is then governed by the density of superconducting carriers. It is shown in many experiments including rf penetration depth measurement that α-(BEDT-TTF)₂NH₄Hg(SCN)₄ and CeCoIn₅ have s-wave and d-wave pairing symmetries, respectively. The pairing symmetry of κ-(BEDT-TTF)₂-Cu(NCS)₂, however, is still an unsolved matter, showing inconsistent results. In this paper, the penetration depth of κ-(BEDT-TTF)₂Cu(NCS)₂ is shown to be more similar to α-(BEDT-TTF)₂NH₄Hg(SCN)₄ than to CeCoIn₅, suggesting the pairing is nodeless.

Research Organization:: Clark Univ., Worcester, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF)

DOE Contract Number:: FG02-05ER46214

OSTI ID:: 1079790

Report Number(s):: DOE/ER/46214-1

Journal Information:: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 142; ISSN 0022-2291

Publisher:: Springer Nature

Country of Publication:: United States

Language:: English

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