Static impurities in a supersolid of interacting hard-core bosons on a triangular lattice

Abstract

We study the effect of impurities in a supersolid phase in comparison to the behavior in the solid and superfluid phases. A supersolid phase has been established for interacting hardcore bosons on a triangular lattice which may be realizable by ultracold atomic gases. Static vacancies are considered in this model which always lower the magnitude of the order parameter in the solid or superfluid phases. In the supersolid phase, however, the impurities directly affect both order parameters simultaneously and thereby reveal an interesting interplay between them. In particular the solid order may be enhanced at the cost of a strong reduction of the superfluidity, which shows that the two order parameters cannot be in a simple superposition. We also observe an unusual impurity pinning effect in the solid ordered phase, which results in two distinct states separated by a first-order transition.

5 pages, 5 figures, final version. More information at http://www.physik.uni-kl.de/eggert/papers/index.html

References in corpus (11)

• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Supersolid hardcore bosons on the triangular lattice
• Ultracold quantum gases in triangular optical lattices
• A Gross-Pitaevskii Treatment for Supersolid He
• Extended supersolid phase of frustrated hard-core bosons on a triangular lattice
• Phase Diagram of Interacting Bosons on the Honeycomb Lattice
• Chain breaks and the susceptibility of Sr_2Cu_{1-x}Pd_xO_{3+δ} and other doped quasi one-dimensional antiferromagnets
• Supersolid Order of Frustrated Hard-Core Bosons in a Triangular Lattice System
• Supersolidity in the triangular lattice spin-1/2 XXZ model: A variational perspective
• Variational wavefunction study of the triangular lattice supersolid
• Universal alternating order around impurities in antiferromagnets

Cited by in corpus (10)

• The phase diagram of the antiferromagnetic XXZ model on the triangular lattice
• Supersolid phase transitions for hardcore bosons on a triangular lattice
• Tuning the Quantum Phase Transition of Bosons in Optical Lattices via Periodic Modulation of s-Wave Scattering Length
• Quantum domain walls induce incommensurate supersolid phase on the anisotropic triangular lattice
• Chiral edge states and fractional charge separation in interacting bosons on a Kagome lattice
• Generalized Effective Potential Landau Theory for Bosonic Quadratic Superlattices
• Frustrated Rydberg Atom Arrays Meet Cavity-QED: Emergence of the Superradiant Clock Phase
• Drude weight in hard core Boson systems: possibility of a finite temperature ideal conductor
• Dissipationless dynamics of spin supersolid states in a spin-1/2 triangular antiferromagnet with impurities
• Entanglement of Hard-Core Bosons in Bipartite Lattices