Tunneling Spectroscopy of the Underdoped High-Tc Superconductors
Abstract
Considering a possibility that the pseudogap state in the underdoped high-Tc superconductors is not due to a superconducting correlation, we study the tunneling spectroscopy below Tc based on the phenomenological models of the pseudogap state. Specifically we consider two cases: (1) the pseudogap is a simple suppression of the density of states with an unknown origin; (2) the pseudogap state is due to an antiferromagnetic correlation. For both cases we calculate dI/dV using the BTK theory. The results are discussed in comparison with experiments.
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