Defect-induced supersolidity with soft-core bosons
Date
2014
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Nature Publishing Group
Abstract
More than 40 years ago, Andreev, Lifshitz and Chester suggested the possible existence of a
peculiar solid phase of matter, the microscopic constituents of which can flow superfluidly
without resistance due to the formation of zero-point defects in the ground state of
self-assembled crystals. Yet, a physical system where this mechanism is unambiguously
established remains to be found, both experimentally and theoretically. Here we investigate
the zero-temperature phase diagram of two-dimensional bosons with finite-range soft-core
interactions. For low particle densities, the system is shown to feature a solid phase in which
zero-point vacancies emerge spontaneously and give rise to superfluid flow of particles
through the crystal. This provides the first example of defect-induced, continuous-space
supersolidity consistent with the Andreev–Lifshitz–Chester scenario.
Description
CITATION: Cinti, F., et al. 2014. Defect-induced supersolidity with soft-core bosons. Nature Communications, 5, Article number:3235, doi:10.1038/ncomms4235.
Keywords
Defect-induced supersolidity, Bosons, Matter (Physics), Fluid mechanics, Superfluidity, Crystals at low temperatures, Crystals -- Defects
Citation
Cinti, F., et al. 2014. Defect-induced supersolidity with soft-core bosons. Nature Communications, 5, Article number:3235, doi:10.1038/ncomms4235