Excitations of a Binary Dipolar Supersolid

by W. Kirkby, A.-C. Lee, D. Baillie, T. Bland, F. Ferlaino, P. B. Blakie, R. N. Bisset

Abstract:

We predict a rich excitation spectrum of a binary dipolar supersolid in a linear crystal geometry, where the ground state consists of two partially immiscible components with alternating, interlocking domains. We identify three Goldstone branches, each with first-sound, second-sound or spin-sound character. In analogy with a diatomic crystal, the resulting lattice has a two-domain primitive basis and we find that the crystal (first-sound-like) branch is split into optical and acoustic phonons. We also find a spin-Higgs branch that is associated with the supersolid modulation amplitude.

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Reference:

Excitations of a Binary Dipolar Supersolid,
W. Kirkby, A.-C. Lee, D. Baillie, T. Bland, F. Ferlaino, P. B. Blakie, R. N. Bisset,
Phys. Rev. Lett., 133, 103401, 2024.

Bibtex Entry:

@article{kirkby2023eoa,
  title = {Excitations of a Binary Dipolar Supersolid},
  author={W. Kirkby and A.-C. Lee and D. Baillie and T. Bland and F. Ferlaino and P. B. Blakie and R. N. Bisset},
  journal = {Phys. Rev. Lett.},
abstract = {We predict a rich excitation spectrum of a binary dipolar supersolid in a linear crystal geometry,
where the ground state consists of two partially immiscible components with alternating, interlocking
domains. We identify three Goldstone branches, each with first-sound, second-sound or spin-sound
character. In analogy with a diatomic crystal, the resulting lattice has a two-domain primitive basis
and we find that the crystal (first-sound-like) branch is split into optical and acoustic phonons. We
also find a spin-Higgs branch that is associated with the supersolid modulation amplitude.},
  volume = {133},
  issue = {10},
  pages = {103401},
  numpages = {7},
  year = {2024},
  month = {Sep},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevLett.133.103401},
arXiv = {http://arxiv.org/abs/2312.03390},
archivePrefix={arXiv},
eprint={2312.03390},
primaryClass={cond-mat.quant-gas},
  url = {https://link.aps.org/doi/10.1103/PhysRevLett.133.103401}
}