BCS theory for s+g-wave superconductivity in borocarbides Y(Lu)Ni2B2C

Qingshan Yuan; Peter Thalmeier

doi:10.1103/PhysRevB.68.174501

← Back to search

BCS theory for s+g-wave superconductivity in borocarbides Y(Lu)Ni2B2C

Qingshan Yuan, Peter Thalmeier

DOI 10.1103/PhysRevB.68.174501 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

The s+g mixed gap function Δk=Δ[(1−x)−xsin4θcos4φ] (x: weight of the g-wave component) has been studied within BCS theory. By suitable consideration of the pairing interaction, we have confirmed that the coexistence of s and g waves, as well as the state with equal s and g amplitudes (i.e., x=1/2) may be stable. This provides the semiphenomenological theory for the s+g-wave superconductivity with point nodes which has been observed experimentally in borocarbide YNi2B2C and possibly in LuNi2B2C.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YNi2B2C 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