Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors

Dahm T, Manske D, Tewordt L (1999)
PHYSICAL REVIEW B 60(21): 14888-14892.

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Abstract
We calculate the c-axis infrared conductivity sigma(c)(omega) in underdoped cuprate superconductors for spin fluctuation exchange scattering within the CuO2 planes including a phenomenological cl-wave pseudogap of amplitude Eg. For temperatures decreasing below a temperature T*similar to E-g/2, a gap for omega<2E(g) develops in sigma(c)(omega) in the incoherent (diffuse) transmission limit. The resistivity shows "semiconducting" behavior, i.e., it increases for low temperatures above the constant behavior for E-g = 0. We find that the pseudogap structure in the in-plane optical conductivity is about twice as big as in the interplane conductivity a,(w), in qualitative agreement with experiment. This is a consequence of the fact that the spin fluctuation exchange interaction is suppressed at low frequencies as a result of the opening of the pseudogap. While the c-axis conductivity in the underdoped regime is described best by incoherent transmission, in the overdoped regime coherent conductance gives a better description. [S0163-1829(99)02842-8].
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Dahm T, Manske D, Tewordt L. Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors. PHYSICAL REVIEW B. 1999;60(21):14888-14892.
Dahm, T., Manske, D., & Tewordt, L. (1999). Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors. PHYSICAL REVIEW B, 60(21), 14888-14892.
Dahm, T., Manske, D., and Tewordt, L. (1999). Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors. PHYSICAL REVIEW B 60, 14888-14892.
Dahm, T., Manske, D., & Tewordt, L., 1999. Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors. PHYSICAL REVIEW B, 60(21), p 14888-14892.
T. Dahm, D. Manske, and L. Tewordt, “Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors”, PHYSICAL REVIEW B, vol. 60, 1999, pp. 14888-14892.
Dahm, T., Manske, D., Tewordt, L.: Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors. PHYSICAL REVIEW B. 60, 14888-14892 (1999).
Dahm, Thomas, Manske, D, and Tewordt, L. “Effect of a normal-state pseudogap on optical conductivity in underdoped cuprate superconductors”. PHYSICAL REVIEW B 60.21 (1999): 14888-14892.
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