Journal article

From the Cooper Problem to Canted Supersolids in Bose-Fermi Mixtures

  • Anders, Peter Theoretische Physik, ETH Zurich, Switzerland
  • Werner, Philipp Department of Physics, University of Fribourg, Switzerland - Theoretische Physik, ETH Zurich, Switzerland
  • Troyer, Matthias Theoretische Physik, ETH Zurich, Switzerland
  • Sigrist, Manfred Theoretische Physik, ETH Zurich, Switzerland
  • Pollet, Lode Theoretische Physik, ETH Zurich, Switzerland - Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, Germany
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    13.11.2012
Published in:
  • Physical Review Letters. - 2012, vol. 109, no. 20, p. 206401
English We calculate the phase diagram of the Bose-Fermi Hubbard model on the 3d cubic lattice at fermionic half filling and bosonic unit filling by means of single-site dynamical mean-field theory. For fast bosons, this is equivalent to the Cooper problem in which the bosons can induce s-wave pairing between the fermions. We also find miscible superfluid and canted supersolid phases depending on the interspecies coupling strength. In contrast, slow bosons favor fermionic charge density wave structures for attractive fermionic interactions. These competing instabilities lead to a rich phase diagram within reach of cold gas experiments.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302779
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