Mutual Chern-Simons Theory of Spontaneous Vortex Phase

TL;DR

This paper uses a mutual Chern-Simons effective theory to analyze the spontaneous vortex phase in doped Mott insulators, providing quantitative predictions for physical properties and phase boundaries consistent with experiments.

Contribution

It develops an effective description of the spontaneous vortex phase using mutual Chern-Simons theory, linking theory with experimental observations in cuprates.

Findings

Quantitative calculations of diamagnetism, spin paramagnetism, magneto-resistance, and Nernst coefficient.

Determination of phase boundaries between $T_v$ and $T_c$ within the theoretical framework.

Results align with experimental measurements of cuprate superconductors.

Abstract

We apply the mutual Chern-Simons effective theory (Phys. Rev. B 71, 235102) of the doped Mott insulator to the study of the so-called spontaneous vortex phase in the low-temperature pseudogap region, which is characterized by strong unconventional superconducting fluctuations. An effective description for the spontaneous vortex phase is derived from the general mutual Chern-Simons Lagrangian, based on which the physical properties including the diamagnetism, spin paramagnetism, magneto-resistance, and the Nernst coefficient, have been quantitatively calculated. The phase boundaries of the spontaneous vortex phase which sits between the onset temperature $T_{v}$ and the superconducting transition temperature $T_{c}$, are also determined within the same framework. The results are consistent with the experimental measurements of the cuprates.