Yong Zheng, Gang Su ^∗
College of Physical Sciences, Graduate University of Chinese Academy of Sciences, PO Box 4588, Beijing 100049, China

Abstract:

By comparing the recently obtained superconducting energy gaps from the scanning tunneling microscopy (STM) and the angle-resolved photoemission spectroscopy (ARPES) for underdoped superconductor Bi₂Sr₂CaCu₂O_8+δ , significant distinctions were observed. By properly taking the effect of quasiparticle spectral weight in the STM spectra into account, good consistency between both energy gaps obtained by STM and ARPES is unveiled.