Field dependence of the zero-energy density of states around vortices in an anisotropic-gap superconductor

N. Nakai; P. Miranović; M. Ichioka; K. Machida

doi:10.1103/PhysRevB.70.100503

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Field dependence of the zero-energy density of states around vortices in an anisotropic-gap superconductor

N. Nakai, P. Miranović, M. Ichioka, K. Machida

DOI 10.1103/PhysRevB.70.100503 · Physical Review B

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Abstract

It is shown theoretically that the Sommerfeld coefficient γ(B) in the mixed state contains useful information on the gap topology in a superconductor. We accurately evaluate γ(B) against magnetic induction B by using microscopic quasiclassical theory. The linear portion in γ(∝B) relative to Bc2 and its slope in low field faithfully corresponds to the gap anisotropy, so that we can distinguish the nodal gap and the anisotropic full gap, and estimate the magnitude of the gap anisotropy.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Pr2-xCexCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown