ac strain based thermodynamic criterion for vortex lattice in type-II superconductors

Peipei Lu; Mengju Yuan; Jing Zhang; Qiang Gao; Shuang Liu; Yugang Zhang; Shipeng Shen; Long Zhang; Jun Lu; Xiaoyuan Zhou; Mingquan He; Aifeng Wang; Yang Li; Wenshan Hong; Shiliang Li; Huiqian Luo; Xingjiang Zhou; Xianhui Chen; Young Sun; Yisheng Chai

doi:10.1103/gl5n-cc1n

ac strain based thermodynamic criterion for vortex lattice in type-II superconductors

Peipei Lu, Mengju Yuan, Jing Zhang, Qiang Gao, Shuang Liu, Yugang Zhang, Shipeng Shen, Long Zhang, Jun Lu, Xiaoyuan Zhou, Mingquan He, Aifeng Wang, Yang Li, Wenshan Hong, Shiliang Li, Huiqian Luo, Xingjiang Zhou, Xianhui Chen, Young Sun, Yisheng Chai

DOI 10.1103/gl5n-cc1n · Physical Review B

T1

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Abstract

We report a dynamic magnetostrictive effect in type-II superconductors (e.g., Nb, YBa2Cu3O7−x, Bi2Sr2CaCu2O8+δ and Ba0.6K0.4Fe2As2) and any type-II superconductor is expected to present a similar response to this new technique. Measured via a composite magnetoelectric technique, an ac field excites an in-phase, nondissipative strain response scaling linearly with vortex density in the vortex lattice phase. In the vortex liquid phase, the signal acquires an out-of-phase component before vanishing in the normal state. We propose the ac strain susceptibility a thermodynamic criterion for the vortex lattice, capturing vortex collective modes inaccessible from static measurements.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9	Pressure not reported	unknown
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9	Pressure not reported	unknown
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	86.4	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	87.2	Pressure not reported	unknown
Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38.5	Pressure not reported	unknown