Pseudogap State in High-$T_c$ Superconductors: an Infrared Study
Abstract
We report on a study of the electromagnetic response of three different families of high-T_c superconductors that in combination allowed us to cover the whole doping range from under- to overdoped. The discussion is focused on the ab-plane charge dynamics in the {\it pseudogap state} which is realized in underdoped materials below a characteristic temperature T^*; a temperature that can significantly exceed the superconducting transition temperature T_c. We explore the evolution of the pseudogap response by changing the doping level, by varying the temperature from the above to below T^*, or by introducing impurities in the underdoped compounds. We employ a memory-function analysis of the ab-plane optical data that allows us to observe the effect of the pseudogap most clearly. We compare the infrared data with other experimental results, including c-axis optical response, dc transport, and angular resolved photoemission.
Keywords
Cite
@article{arxiv.cond-mat/9611083,
title = {Pseudogap State in High-$T_c$ Superconductors: an Infrared Study},
author = {A. V. Puchkov and D. N. Basov and T. Timusk},
journal= {arXiv preprint arXiv:cond-mat/9611083},
year = {2008}
}
Comments
In proceedings of conf. on non-Fermi liquids at ITP, Santa Barbara, 1996, to appear in the Journal of Physics, Condensed Matter; 38 pages, RevTeX, with 15 figures