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

Journal Article · Mon Aug 01 04:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.84.060508· OSTI ID:21596840

Chaoming, Jian; Hui, Zhai ^[1]

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1. Institute for Advanced Study, Tsinghua University, Beijing 100084 (China)

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.

• OSTI ID: 21596840
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 6 Vol. 84; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR MOMENTUM
BOSONS
COUPLING
CRITICAL TEMPERATURE
ENERGY LEVELS
GROUND STATES
INTERACTING BOSON MODEL
INTERMEDIATE COUPLING
L-S COUPLING
MATHEMATICAL MODELS
NUCLEAR MODELS
ORBITS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PROLIFERATION
SHELL MODELS
SPIN
SUPERFLUIDITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS
VORTICES
WAVE PROPAGATION