Nematic quantum liquid crystals of bosons in frustrated lattices
We consider a family of tight-binding models with macroscopically degenerate lowest energy band, separated from other bands by a gap. At zero temperature, the absence of a unique minimum in the single particle dispersion makes the standard Bose condensation unfavorable. Instead, by constructing exact solutions of the interacting problem and making controlled flat-band projection (enabled by the spectral gap), we demonstrate formation of exotic states that spontaneously break rotational symmetry. They are nematic Wigner crystal, supersolid, and superfluid. In particular, the nematic superfluid is uniform in real space but has anisotropic momentum distribution, which provides a new scenario of Bose condensate.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Science Foundation (NSF)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1357774
- Journal Information:
- Physical Review B, Vol. 93, Issue 14; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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