Fermionic phases and their transitions induced by competing finite-range interactions

Szyniszewski, Marcin and Schomerus, Henning Ulrich (2018) Fermionic phases and their transitions induced by competing finite-range interactions. Physical review B, 98. ISSN 1098-0121

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We identify ground states of one-dimensional fermionic systems subject to competing repulsive interactions of finite range, and provide phenomenological and fundamental signatures of these phases and their transitions. Commensurable particle densities admit multiple competing charge-ordered insulating states with various periodicities and internal structure. Our reference point are systems with interaction range p = 2 , where phase transitions between these charge-ordered configurations are known to be mediated by liquid and bond-ordered phases. For increased interaction range p = 4 , we find that the phase transitions can also appear to be abrupt, as well as being mediated by re-emergent ordered phases that cross over into liquid behavior. These considerations are underpinned by a classification of the competing charge-ordered states in the atomic limit for varying interaction range at the principal commensurable particle densities. We also consider the effects of disorder, leading to fragmentization of the ordered phases and localization of the liquid phases.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 2018 American Physical Society
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Deposited On:
23 Aug 2018 09:00
Last Modified:
17 Sep 2023 02:20