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Dropping an impurity into a Chern insulator: A polaron view on topological matter

Author
Camacho-Guardián, A.; Goldman, N.; Massignan, P.; Bruun, G. M.
Type of activity
Journal article
Journal
Physical review B
Date of publication
2019-02-05
Volume
99
DOI
10.1103/PhysRevB.99.081105
Repository
http://hdl.handle.net/2117/167702 Open in new window
URL
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.081105 Open in new window
Abstract
We investigate the properties of an impurity particle interacting with a Fermi gas in a Cherninsulating state. The interaction leads to the formation of an exotic polaron, which consists of a coherent superposition of the topologically-trivial impurity and the surrounding topological cloud. We characterize this intriguing topologically-composite object by calculating its transverse (Hall) conductivity, using diagrammatic as well as variational methods. The “polaronic Hall conductivity”, i.e....
Citation
Camacho-Guardián, A. [et al.]. Dropping an impurity into a Chern insulator: A polaron view on topological matter. "Physical review B", 5 Febrer 2019, vol. 99.
Group of research
SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity

Participants

  • Camacho-Guardián, Arturo  (author)
  • Goldman, Nathan  (author)
  • Massignan, Pietro Alberto  (author)
  • Bruun, Georg M.  (author)

Attachments