Related Experiment Video
Updated: Jan 23, 2026

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
Published on: December 4, 2013
Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint
Itzik Kapon1, Zaher Salman2, Itay Mangel3
1Department of Physics, Technion-Israel Institute of Technology, 3200003, Haifa, Israel. itzikapon@gmail.com.
Abstract:
A method to measure the superconducting (SC) stiffness tensor [Formula: see text], without subjecting the sample to external magnetic field, is applied to La1.875Sr0.125CuO4. The method is based on the London equation [Formula: see text], 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, [Formula: see text] 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.
Related Concept Videos
Phase Transitions
Phase Transitions: Sublimation and Deposition
Phase Transitions: Melting and Freezing
Phase Transitions: Vaporization and Condensation
Magnetic Fields
A magnetic field is defined by the force that a charged particle experiences...
Magnetic Field of a Solenoid
Consider a solenoid with 100 turns wrapped around a cylinder of...

