Optical conductivity and the sum rule in the DDW state

2004/06/18 by D. N. Aristov, R. Zeyher
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el

paper · pdf · doi:10.1016/j.physb.2005.01.137

published as Physica B 359-361, 530 (2005) · 2 pages, 2 figures, SCES04 proceedings

arxiv created 2004/06/18 · openalex publication_date 2005/02/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The density-wave with d-wave order parameter (DDW) is possibly realized in the underdoped regime of high-T_c cuprates. The DDW state is characterized by two branches of low-lying electronic excitations, and the quantum mechanical current has in particular an inter-branch contribution. The latter component causes a finite-frequency response in the optical conductivity and a reduction of the Drude contribution. We show that this redistribution of the spectral weight leaves the optical sum mostly intact, so that the restricted optical sum rule is only weakly violated.

Citations

• Effect of orbital currents on the restricted optical conductivity sum rule
• Hall conductivity in unconventional charge-density-wave systems

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