Krasnov V M, Yurgens A, Winkler D, Delsing P, Claeson T
Department of Microelectronics and Nanoscience, Chalmers University of Technology, S-41296 Göteborg, Sweden.
Phys Rev Lett. 2000 Jun 19;84(25):5860-3. doi: 10.1103/PhysRevLett.84.5860.
We present intrinsic tunneling spectroscopy measurements on small Bi2Sr2CaCu2O8+x mesas. The tunnel conductance curves show both sharp peaks at the superconducting gap voltage and broad humps representing the c-axis pseudogap. The superconducting gap vanishes at Tc, while the pseudogap exists both above and below Tc. Our observation implies that the superconducting and pseudogaps represent different coexisting phenomena.
我们展示了对小尺寸Bi2Sr2CaCu2O8+x台面的本征隧穿光谱测量结果。隧道电导曲线在超导能隙电压处显示出尖锐的峰，以及代表c轴赝能隙的宽峰。超导能隙在Tc时消失，而赝能隙在Tc之上和之下均存在。我们的观察表明，超导能隙和赝能隙代表了不同的共存现象。
