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1998•Physical review. B, Condensed matterRequires access

Effects of strong correlation on photoemission spectroscopy

Daning Shi, Ming-wen Xiao, Zheng-zhong Li

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Abstract

In the framework of linear-response theory, the effects of strong correlation on angle-resolved photoemission spectroscopy (ARPES) are studied based on a modified photon-electron Hamiltonian, where the strong on-site Coulomb repulsion existing in high-${T}_{c}$ cuprates has been taken into account. Our theoretical results show that the large broad background, the nonsum rule, the extended van Hove singularity, and the directional dependence of the diplike feature observed experimentally in the ARPES of high-${T}_{c}$ materials can be explained in a natural way.

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What this paper is about

In the framework of linear-response theory, the effects of strong correlation on angle-resolved photoemission spectroscopy (ARPES) are studied based on a modified photon-electron Hamiltonian, where the strong on-site Coulomb repulsion existing in high-${T}_{c}$ cuprates has been taken into account. Our theoretical results show that the large broad background, the nonsum rule, the extended van Hove singularity, and the directional dependence of the diplike feature observed experimentally in the ARPES of high-${T}_{c}$ materials can be explained in a natural way.

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Available abstract

In the framework of linear-response theory, the effects of strong correlation on angle-resolved photoemission spectroscopy (ARPES) are studied based on a modified photon-electron Hamiltonian, where the strong on-site Coulomb repulsion existing in high-${T}_{c}$ cuprates has been taken into account. Our theoretical results show that the large broad background, the nonsum rule, the extended van Hove singularity, and the directional dependence of the diplike feature observed experimentally in the ARPES of high-${T}_{c}$ materials can be explained in a natural way.

Key concepts: Angle-resolved photoemission spectroscopy, Van Hove singularity, Photoemission spectroscopy, Physics, Cuprate, Hamiltonian (control theory), Condensed matter physics, Electronic correlation

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