In-Plane Conductivity Anisotropy in Underdoped Cuprates in the Spin-Charge Gauge Approach

Details In-Plane Conductivity Anisotropy in Underdoped Cuprates in the Spin-Charge Gauge Approach In-Plane Conductivity Anisotropy in Underdoped Cuprates in the Spin-Charge Gauge Approach

2004-04-30

arxiv.org/abs/cond-mat/0404726v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.69.214514

Applying the recently developed spin-charge gauge theory for the pseudogap phase in cuprates, we propose a self-consistent explanation of several peculiar features of the far-infrared in-plane AC conductivity, including a broad peak as a function of frequency and significant anisotropy at low temperatures, along with a similar temperature-dependent in-plane anisotropy of DC conductivity in lightly doped cuprates. The anisotropy of the metal-insulator crossover scale is considered to be responsible for these phenomena. The obtained results are in good agreement with experiments. An explicit proposal is made to further check the theory.

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