Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint

Itzik Kapon; Zaher Salman; Itay Mangel; Thomas Prokscha; Nir Gavish; Amit Keren

doi:https://doi.org/10.1038/s41467-019-10480-x

Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint

Itzik Kapon, Zaher Salman, Itay Mangel, Thomas Prokscha, Nir Gavish, Amit Keren

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

A method to measure the superconducting (SC) stiffness tensor ρ¯ _s, without subjecting the sample to external magnetic field, is applied to La_1.875Sr_0.125CuO₄. The method is based on the London equation J= - ρ¯ _sA, where J is the current density and A is the vector potential which is applied in the SC state. Using rotor free A and measuring J via the magnetic moment of superconducting rings, ρ¯ _s at T → T_c is extracted. The technique is sensitive to very small stiffnesses (penetration depths on the order of a few millimeters). The method is applied to two different rings: one with the current running only in the CuO₂ planes, and another where the current must cross planes. We find different transition temperatures for the two rings, namely, there is a temperature range with two-dimensional stiffness. Additional low energy muon spin rotation measurements on the same sample determine the stiffness anisotropy at T < T_c.

Original language	English
Article number	2463
Journal	Nature Communications
Volume	10
Issue number	1
DOIs	https://doi.org/10.1038/s41467-019-10480-x
State	Published - 1 Dec 2019

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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Cite this

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title = "Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint",

abstract = "A method to measure the superconducting (SC) stiffness tensor ρ¯ s, without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation J= - ρ¯ sA, where J is the current density and A is the vector potential which is applied in the SC state. Using rotor free A and measuring J via the magnetic moment of superconducting rings, ρ¯ s at T → Tc is extracted. The technique is sensitive to very small stiffnesses (penetration depths on the order of a few millimeters). The method is applied to two different rings: one with the current running only in the CuO2 planes, and another where the current must cross planes. We find different transition temperatures for the two rings, namely, there is a temperature range with two-dimensional stiffness. Additional low energy muon spin rotation measurements on the same sample determine the stiffness anisotropy at T < Tc.",

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T1 - Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint

AU - Kapon, Itzik

AU - Salman, Zaher

AU - Mangel, Itay

AU - Prokscha, Thomas

AU - Gavish, Nir

AU - Keren, Amit

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N2 - A method to measure the superconducting (SC) stiffness tensor ρ¯ s, without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation J= - ρ¯ sA, where J is the current density and A is the vector potential which is applied in the SC state. Using rotor free A and measuring J via the magnetic moment of superconducting rings, ρ¯ s at T → Tc is extracted. The technique is sensitive to very small stiffnesses (penetration depths on the order of a few millimeters). The method is applied to two different rings: one with the current running only in the CuO2 planes, and another where the current must cross planes. We find different transition temperatures for the two rings, namely, there is a temperature range with two-dimensional stiffness. Additional low energy muon spin rotation measurements on the same sample determine the stiffness anisotropy at T < Tc.

AB - A method to measure the superconducting (SC) stiffness tensor ρ¯ s, without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation J= - ρ¯ sA, where J is the current density and A is the vector potential which is applied in the SC state. Using rotor free A and measuring J via the magnetic moment of superconducting rings, ρ¯ s at T → Tc is extracted. The technique is sensitive to very small stiffnesses (penetration depths on the order of a few millimeters). The method is applied to two different rings: one with the current running only in the CuO2 planes, and another where the current must cross planes. We find different transition temperatures for the two rings, namely, there is a temperature range with two-dimensional stiffness. Additional low energy muon spin rotation measurements on the same sample determine the stiffness anisotropy at T < Tc.

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ER -

Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint

Abstract

All Science Journal Classification (ASJC) codes

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