T1−1 peak near Tc in unconventional Bardeen-Cooper-Schrieffer superconductors

David Parker; Stephan Haas

doi:10.1103/PhysRevB.75.052501

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T1−1 peak near Tc in unconventional Bardeen-Cooper-Schrieffer superconductors

David Parker, Stephan Haas

DOI 10.1103/PhysRevB.75.052501 · Physical Review B

T1

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Abstract

We demonstrate that within Bardeen-Cooper-Schrieffer superconductivity theory the nuclear spin lattice relaxation rate T1−1 should show a small peak just below Tc for any unconventional superconductor. This contradicts the commonly held belief that such a peak is a signature of conventional, s-wave pairing, and thus calls into question one of the experimental cornerstones of conventional superconductivity. We suggest appropriate materials in which to measure this peak.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pd3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pt3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown