Phys. Rev. B 66, 104526 (2002) [7 pages]Bosons in fluctuating gauge fields: Bose metal and phase separationReceived 31 May 2002; published 30 September 2002 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 nonsuperfluid (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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.104526
DOI:
10.1103/PhysRevB.66.104526
PACS:
74.20.Mn, 67.40.Db
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