Superconductivity in mutual Chern-Simons gauge theory

Peng Ye, Long Zhang, and Zheng-Yu Weng
Phys. Rev. B 85, 205142 – Published 29 May 2012

Abstract

In this work, we present a topological characterization of superconductivity in a prototype electron fractionalization model for doped Mott insulators. In this model, spinons and holons are coupled via the mutual Chern-Simons gauge fields. We obtain a low-lying effective description of the collective current fluctuations by integrating out the matter fields, which replaces the conventional Ginzburg-Landau action to describe the generalized rigidity of superconductivity. The superconducting phase coherence is essentially characterized by a topological order parameter related to a Gaussian linking number, and an experiment is proposed to probe this topological property. We further show that a gauge-neutral fermionic mode can naturally emerge in this model, which behaves like a Bogoliubov quasiparticle.

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  • Received 2 April 2012

DOI:https://doi.org/10.1103/PhysRevB.85.205142

©2012 American Physical Society

Authors & Affiliations

Peng Ye*, Long Zhang, and Zheng-Yu Weng

  • Institute for Advanced Study, Tsinghua University, Beijing 100084, People's Republic of China

  • *yep07@mails.tsinghua.edu.cn

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Issue

Vol. 85, Iss. 20 — 15 May 2012

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