Charge dynamics in electron-underdoped high-Tc cuprates |
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Authors: | T. Tohyama S. Maekawa |
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Affiliation: | Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan |
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Abstract: | We investigate charge dynamics in the antiferromagnetic (AF) phase of electron-doped cuprates by using numerically exact diagonalization technique for an electron-doped t-t′-J model. When AF correlation develops with decreasing temperature, a gap-like behavior emerges in the optical conductivity accompanied by the enhancement of the coherent motion of carriers due to the same sublattice hoppings. This is a remarkable contrast to the behavior of a hole-doped t-t′-J model. |
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Keywords: | D. Optical properties D. Electronic structure |
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