Anomaly of longitudinal spin susceptibility at a superconducting instability inside a magnetic phase

Hiroyuki Yamase; Muhammad Zafur

doi:10.1103/PhysRevB.103.224527

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Anomaly of longitudinal spin susceptibility at a superconducting instability inside a magnetic phase

Hiroyuki Yamase, Muhammad Zafur

DOI 10.1103/PhysRevB.103.224527 · Physical Review B

T1

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Abstract

We study the longitudinal spin susceptibility inside a magnetically ordered phase, which exhibits a superconducting instability leading to a coexistence of the two ordered phases. Inside the magnetic phase, the superconducting gap acquires a linear term in a magnetic field applied along the direction of the magnetic moment. We find that such a linear term generates a jump of the longitudinal spin susceptibility when the superconducting instability occurs via a continuous phase transition. This anomaly at the superconducting instability is a thermodynamic signature of the microscopic coexistence of superconductivity and magnetism and can be a general feature associated with the breaking of spin rotational symmetry inside the magnetic phase.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown