Spatial structure of the superconducting phase in heavy-fermion systems and anomalies in the excitation spectrum

L. I. Burlachkov; N. B. Kopnin

doi:10.1007/BF00682153

Spatial structure of the superconducting phase in heavy-fermion systems and anomalies in the excitation spectrum

L. I. Burlachkov, N. B. Kopnin

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Abstract

A degenerate superconducting phase in a metal with strong spin-orbital coupling may have a domain structure at low temperatures. The domain walls (of width ∼ξ=v_F/Δ₀) carry a finite density of states N(0)≈mk_f/π² per unit volume, which in turn results in the presence of a linear term γT in the electronic specific heat C_e(T). With the help of the Atiyah-Singer theorem, this can be proved for a wide class of domain structures.

Original language	English
Pages (from-to)	451-460
Number of pages	10
Journal	Journal of Low Temperature Physics
Volume	72
Issue number	5-6
DOIs	https://doi.org/10.1007/BF00682153
State	Published - Sep 1988
Externally published	Yes

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N2 - A degenerate superconducting phase in a metal with strong spin-orbital coupling may have a domain structure at low temperatures. The domain walls (of width ∼ξ=vF/Δ0) carry a finite density of states N(0)≈mkf/π2 per unit volume, which in turn results in the presence of a linear term γT in the electronic specific heat Ce(T). With the help of the Atiyah-Singer theorem, this can be proved for a wide class of domain structures.

AB - A degenerate superconducting phase in a metal with strong spin-orbital coupling may have a domain structure at low temperatures. The domain walls (of width ∼ξ=vF/Δ0) carry a finite density of states N(0)≈mkf/π2 per unit volume, which in turn results in the presence of a linear term γT in the electronic specific heat Ce(T). With the help of the Atiyah-Singer theorem, this can be proved for a wide class of domain structures.

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Spatial structure of the superconducting phase in heavy-fermion systems and anomalies in the excitation spectrum

Abstract

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