R.D. Murphy, R.O. Watts
Journal of Low Temperature Physics
We have measured the superconducting energy gap of high-critical- temperature (Tc90 K) YBa2Cu3O9-y samples using tunneling and infrared techniques. From our tunneling data, we place limits on the reduced superconducting energy gap of 3.7<2/kBTc<5.6. The tunneling gaps for a single-crystal sample are essentially the same if the tunneling tip is oriented either parallel or perpendicular to the CuO planes. The infrared measurements give a smaller apparent gap. We discuss the origins of the differences between the infrared and tunneling results. © 1987 The American Physical Society.
R.D. Murphy, R.O. Watts
Journal of Low Temperature Physics
Ellen J. Yoffa, David Adler
Physical Review B
Z. Schlesinger, S. Allen, et al.
ICPS Physics of Semiconductors 1984
Revanth Kodoru, Atanu Saha, et al.
arXiv