Effects of defects in the XY chain with frustrated boundary conditions

Scientific paper - Original scientific paper

• Author: Gianpaolo Torre
• Author: Vanja Marić
• Author: Fabio Franchini
• Author: Salvatore Marco Giampaolo
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

It has been recently proven that new types of bulk local order can ensue due to frustrated boundary condition, that is, periodic boundary conditions with an odd number of lattice sites and antiferromagnetic interactions. For the quantum XY chain in zero external fields, the usual antiferromagnetic order has been found to be replaced either by a mesoscopic ferromagnet or by an incommensurate AFM order. In this work we examine the resilience of these new types of orders against a defect that breaks the translational symmetry of the model. We find that, while a ferromagnetic defect restores the traditional, staggered order, an AFM one stabilizes the incommensurate order. The robustness of the frustrated order to certain kinds of defects paves the way for its experimental observability.

• Keywords (english): frustration; defect
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review B
• Numbering: vol. 103, no. 1, 014429
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.103.014429
• URN:NBN: urn:nbn:hr:217:897588
• Publication: 2021
• Project: Number: KK.01.1.1.01.0004; Title (english): QuantiXLie Center of Excellence; Acronym: QuantiXLie; Leader: Hrvoje Buljan; Jurisdiction: eu; Funding stream: European Regional Development Fund - the Competitiveness and Cohesion Operational Programme
• Project: Number: IP-2016-06-3347; Title (english): Novel Characterizations of Classical and Quantum Many-Body Systems (ManyBodyCharacteriza; Acronym: ManyBodyCharacteriza; Leader: Fabio Franchini; Jurisdiction: Croatia; Funding stream: IP
• Project: Number: IP-2019-04-3321; Title (croatian): Frustrirani kompleksni sustavi; Title (english): Frustrated Complex Systems; Acronym: FCS; Leader: Salvatore Marco Giampaolo; Jurisdiction: Croatia; Funding stream: Nema
• Document URL: https://link.aps.org/doi/10.1103/PhysRevB.103.014429
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2021 American Physical Society. Received 28 August 2020; Accepted 5 January 2021; Published 19 January 2021.
• Created on: 2023-08-06 18:36:11