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24 April 2024

» arxiv » cond-mat/0606257

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Competing Orders and Quantum Phase Fluctuations on the Low-Energy Excitations and Pseudogap Phenomena of Cuprate Superconductors
C.-T. Chen ; A. D. Beyer ; N.-C. Yeh ;
Date:	10 Jun 2006
Subject:	Superconductivity
Abstract:	We consider the low-energy excitation spectra of cuprate superconductors by incorporating both superconductivity (SC) and competing orders (CO) in the bare Green’s function and quantum phase fluctuations in the self-energy. Our key findings include excess subgap quasiparticle density of states even for fully gapped SC and CO, ``dichotomy’’ in the fluctuation-renormalized order parameter and quasiparticle spectral density in momentum space, and the occurrence and magnitude of pseudogap being dependent on the relative gap strength of CO and SC.
Source:	arXiv, cond-mat/0606257
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