Time-reversal symmetry breaking in superconductors: A proposed experimental test

M. R. Beasley; D. Lew; R. B. Laughlin

doi:10.1103/PhysRevB.49.12330

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Time-reversal symmetry breaking in superconductors: A proposed experimental test

M. R. Beasley, D. Lew, R. B. Laughlin

DOI 10.1103/PhysRevB.49.12330 · Physical Review B

T1

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Abstract

We propose an experiment to test for broken time-reversal symmetry in the high-temperature superconductors. We configure a superconducting quantum interference device (SQUID) in a manner similar to that used recently to test for dx2-y2 symmetry, but where one junction is on a crystal face of arbitrary angle. Assuming a dx2-y2+iεdxy symmetry, we calculate the magnetic diffraction patterns for the SQUID for various values of ε and angle. For any nonzero ε, i.e., time-reversal symmetry breaking, we find a nonzero circulating current spontaneously arises in the SQUID even in zero applied magnetic field and zero bias current.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown