Aarhus University Seal / Aarhus Universitets segl

Thomas Pohl

Defect-induced supersolidity with soft-core bosons

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

DOI

  • F. Cinti, Natl Inst Theoret Phys NITheP
  • ,
  • T. Macri
  • ,
  • W. Lechner, University of Innsbruck
  • ,
  • Guido Pupillo, Univ Strasbourg, Centre National de la Recherche Scientifique (CNRS), University of Strasbourg, CNRS IN2P3, IPHC
  • ,
  • T. Pohl

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.

Original languageEnglish
Article number3235
JournalNature Communications
Volume5
Number of pages6
ISSN2041-1723
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes

    Research areas

  • SOLID HE-4, SUPERFLUID, CRYSTALS, HELIUM, GAS, CAVITY, PHASE

See relations at Aarhus University Citationformats

ID: 110543567