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Emergent Spin-1 Trimerized Valence Bond Crystal In The Spin-1/2 Heisenberg Model On The Star Lattice

Title: Emergent Spin-1 Trimerized Valence Bond Crystal In The Spin-1/2 Heisenberg Model On The Star Lattice.
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Name(s): Ran, Shi-Ju, author
Li, Wei, author
Gong, Shou-Shu, author
Weichselbaum, Andreas, author
von Delft, Jan, author
Su, Gang, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-02-26
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We explore the frustrated spin-1/2 Heisenberg model on the star lattice with antiferromagnetic (AF) couplings inside each triangle and ferromagnetic (FM) intertriangle couplings (J(e) < 0), and calculate its magnetic and thermodynamic properties. We show that the FM couplings do not sabotage the magnetic disordering of the ground state due to the frustration from the AF interactions inside each triangle, but trigger a fully gapped inversion-symmetry-breaking trimerized valence bond crystal (TVBC) with emergent spin-1 degrees of freedom. We discover that with strengthening J(e), the system exhibits a universal scaling behavior either with or without a magnetic field h: the order parameter, the five critical fields that separate the J(e)-h ground-state phase diagram into six phases, and the excitation gap obtained by low-temperature specific heat, all depend exponentially on J(e). Our work implies that the spin-1 VBCs can be stabilized by introducing small FM couplings in the geometrically frustrated spin-1/2 systems.
Identifier: FSU_libsubv1_wos_000426042500002 (IID), 10.1103/PhysRevB.97.075146 (DOI)
Keywords: field, antiferromagnet, order, liquid
Publication Note: The publisher's version of record is available at https://doi.org/10.1103/PhysRevB.97.075146
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000426042500002
Owner Institution: FSU
Is Part Of: Physical Review B.
2469-9950
Issue: iss. 7, vol. 97

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Ran, S. -J., Li, W., Gong, S. -S., Weichselbaum, A., Von Delft, J., & Su, G. (2018). Emergent Spin-1 Trimerized Valence Bond Crystal In The Spin-1/2 Heisenberg Model On The Star Lattice. Physical Review B. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000426042500002