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Pseudogap State in High-$T_c$ Superconductors: an Infrared Study | | A.V. Puchkov
; D.N. Basov
; T. Timusk
; | | Date: |
12 Nov 1996 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | 1,2) and T. Timusk ( Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada Department of Physics, Brookhaven National Laboratory | | 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. | | Source: | arXiv, cond-mat/9611083 | | Services: | Forum | Review | PDF | Favorites | |
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