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Title: Paired superfluidity and fractionalized vortices in systems of spin-orbit coupled bosons

Abstract

In this Rapid Communication we study finite-temperature properties of spin-1/2 interacting bosons with spin-orbit coupling in two dimensions. When the ground state has stripe order, we show that thermal fluctuations will first melt the stripe order and lead to a superfluid of boson pairs if the spin-orbit coupling is isotropic or nearly isotropic. Such a phase supports fractionalized quantum vortices. The Kosterlitz-Thouless transition from superfluid to normal state is driven by proliferation of half vortices. When the ground state is a plane-wave state, the transition to normal state is driven by conventional Kosterlitz-Thouless transition. However, the critical temperature will drop to zero for isotropic spin-orbit coupling.

Authors:
;  [1]
  1. Institute for Advanced Study, Tsinghua University, Beijing 100084 (China)
Publication Date:
OSTI Identifier:
21596840
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevB.84.060508; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOSONS; CRITICAL TEMPERATURE; GROUND STATES; INTERACTING BOSON MODEL; L-S COUPLING; ORBITS; PROLIFERATION; SPIN; SUPERFLUIDITY; TWO-DIMENSIONAL CALCULATIONS; VORTICES; WAVE PROPAGATION; ANGULAR MOMENTUM; COUPLING; ENERGY LEVELS; INTERMEDIATE COUPLING; MATHEMATICAL MODELS; NUCLEAR MODELS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; SHELL MODELS; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE

Citation Formats

Chaoming, Jian, and Hui, Zhai. Paired superfluidity and fractionalized vortices in systems of spin-orbit coupled bosons. United States: N. p., 2011. Web. doi:10.1103/PHYSREVB.84.060508.
Chaoming, Jian, & Hui, Zhai. Paired superfluidity and fractionalized vortices in systems of spin-orbit coupled bosons. United States. https://doi.org/10.1103/PHYSREVB.84.060508
Chaoming, Jian, and Hui, Zhai. Mon . "Paired superfluidity and fractionalized vortices in systems of spin-orbit coupled bosons". United States. https://doi.org/10.1103/PHYSREVB.84.060508.
@article{osti_21596840,
title = {Paired superfluidity and fractionalized vortices in systems of spin-orbit coupled bosons},
author = {Chaoming, Jian and Hui, Zhai},
abstractNote = {In this Rapid Communication we study finite-temperature properties of spin-1/2 interacting bosons with spin-orbit coupling in two dimensions. When the ground state has stripe order, we show that thermal fluctuations will first melt the stripe order and lead to a superfluid of boson pairs if the spin-orbit coupling is isotropic or nearly isotropic. Such a phase supports fractionalized quantum vortices. The Kosterlitz-Thouless transition from superfluid to normal state is driven by proliferation of half vortices. When the ground state is a plane-wave state, the transition to normal state is driven by conventional Kosterlitz-Thouless transition. However, the critical temperature will drop to zero for isotropic spin-orbit coupling.},
doi = {10.1103/PHYSREVB.84.060508},
url = {https://www.osti.gov/biblio/21596840}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 6,
volume = 84,
place = {United States},
year = {2011},
month = {8}
}