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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Random-bond disorder in two-dimensional noncollinear XY antiferromagnets: From quasi-long-range order to spin glass

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Author(s):
Dey, Santanu [1, 2] ; Andrade, Eric C. [3] ; Vojta, Matthias [1, 2]
Total Authors: 3
Affiliation:
[1] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden - Germany
[2] Tech Univ Dresden, Wurzburg Dresden Cluster Excellence Ctqmat, D-01062 Dresden - Germany
[3] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Physical Review B; v. 102, n. 12 SEP 14 2020.
Web of Science Citations: 0
Abstract

We study the effects of quenched bond disorder in frustrated easy-plane antiferromagnets in two space dimensions, using a combination of analytical and numerical techniques. We consider local-moment systems which display noncollinear long-range order at zero temperature, with the antiferromagnetic triangular-lattice XY model as a prime example. We show that (i) weak bond disorder transforms the clean ground state into a state with quasi-long-range order, and (ii) strong bond disorder results in a short-range-ordered glassy ground state. Using extensive Monte Carlo simulations, we also track the fate of the quasi-long-range-ordered phase at finite temperature and the associated Kosterlitz-Thouless-like transition. Making contact with previous studies of disordered XY models, we discuss similarities and differences concerning the interplay of disorder and frustration. Our results are also of relevance to noncollinear Heisenberg magnets in an external magnetic field. (AU)

FAPESP's process: 19/17026-9 - Frustrated magnets: anisotropy and and inhomogeneities
Grantee:Eric de Castro e Andrade
Support type: Regular Research Grants