Sound velocity and Meissner effect in light-heavy fermion pairing systems

Lianyi He; Meng Jin; Pengfei Zhuang

doi:10.1103/PhysRevB.73.220504

← Back to search

Sound velocity and Meissner effect in light-heavy fermion pairing systems

Lianyi He, Meng Jin, Pengfei Zhuang

DOI 10.1103/PhysRevB.73.220504 · 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

In the frame of a four-fermion interaction theory, we investigated the collective excitation in light-heavy fermion pairing systems. When the two species of fermions possess different masses and chemical potentials but keep the same Fermi surface, we found that the sound velocity in superfluids and the inverse penetration depth in superconductors have the same mass ratio dependence as the ratio of the transition temperature to the zero-temperature gap.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Li6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
K40 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown