Bosons in fluctuating gauge fields: Bose metal and phase separation

Abstract

We study a two-dimensional system of bosons interacting with a fluctuating U(1) gauge field with overdamped dynamics. We find two instabilities of the condensed phase at T=0: one to phase separation and another to a homogeneous non-superfluid (Bose metal). The presence of both instabilities in the model is dependent on the low-energy form of the gauge field propagator. We discuss the relevance of our findings to the U(1) gauge theory of the t--J model.

8 pages, 7 figures, to appear in Phys Rev B

References in corpus (1)

• Interaction-induced Bose Metal in 2D

Cited by in corpus (3)

• Absence of U(1) spin liquids in two dimensions
• SU(2) gauge theory of the Hubbard model: Emergence of an anomalous metallic phase near the Mott critical point
• Bandwidth-control vs. doping-control Mott transition in the Hubbard model