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 - symmetry, but where one junction is on a crystal face of arbitrary angle. Assuming a -+iε 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.
- Received 20 December 1993
DOI:https://doi.org/10.1103/PhysRevB.49.12330
©1994 American Physical Society