Tunneling spectroscopy of the energy gap in semiconducting La1.98Sr0.02CuO4
T. Ekino, H. Hashimoto, H. Fujii, J. Hori, F. Nakamura and T. Fujita
Physica C
357-360
158
161
https://doi.org/10.1016/S0921-4534(01)00215-5