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Devil's staircases without particle-hole symmetry

(2018) Devil's staircases without particle-hole symmetry. Physical Review B , 97 (7) , Article 075117. 10.1103/PhysRevB.97.075117. Green open access

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Abstract

We present and analyze spin models with long-range interactions whose ground state features a so-called devil's staircase and where plateaus of the staircase are accessed by varying two-body interactions. This is in contrast to the canonical devil's staircase, for example, occurring in the one-dimensional Ising model with long-range interactions, where typically a single-body chemical potential is varied to scan through the plateaus. These systems, moreover, typically feature a particle-hole symmetry which trivially connects the hole part of the staircase (filling fraction f≥1/2) to its particle part (f≤1/2). Such symmetry is absent in our models and hence the particle sector and the hole sector can be separately controlled, resulting in exotic hybrid staircases.

Type: Article
Title: Devil's staircases without particle-hole symmetry
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.97.075117
Publisher version: https://doi.org/10.1103/PhysRevB.97.075117
Language: English
Additional information: This version is the version of the record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: 1-dimensional spin chains, Fractals, Ising model, Spin lattice models, Symmetries in condensed matter
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10066024
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