We consider frustrated Heisenberg antiferromagnets, whose clean-limit ground state is characterized by noncollinear long-range order with nonzero vector chirality, and study the effects of quenched bond disorder, i.e., random exchange couplings. A single bond defect is known to induce a dipolar texture in the spin background independent of microscopic details. Using general analytical arguments as well as large-scale simulations for the classical triangular-lattice Heisenberg model, we show that any finite concentration of such defects destroys long-range order for spatial dimension d≤2, in favor of a glassy state whose correlation length in d=2 is exponentially large for small randomness. Our results are relevant for a wide range of layered frustrated magnets.
Описание
Phys. Rev. B 101, 020411(R) (2020) - Destruction of long-range order in noncollinear two-dimensional antiferromagnets by random-bond disorder
%0 Journal Article
%1 PhysRevB.101.020411
%A Dey, Santanu
%A Andrade, Eric C.
%A Vojta, Matthias
%D 2020
%I American Physical Society
%J Phys. Rev. B
%K a b
%N 2
%P 020411
%R 10.1103/PhysRevB.101.020411
%T Destruction of long-range order in noncollinear two-dimensional antiferromagnets by random-bond disorder
%U https://link.aps.org/doi/10.1103/PhysRevB.101.020411
%V 101
%X We consider frustrated Heisenberg antiferromagnets, whose clean-limit ground state is characterized by noncollinear long-range order with nonzero vector chirality, and study the effects of quenched bond disorder, i.e., random exchange couplings. A single bond defect is known to induce a dipolar texture in the spin background independent of microscopic details. Using general analytical arguments as well as large-scale simulations for the classical triangular-lattice Heisenberg model, we show that any finite concentration of such defects destroys long-range order for spatial dimension d≤2, in favor of a glassy state whose correlation length in d=2 is exponentially large for small randomness. Our results are relevant for a wide range of layered frustrated magnets.
@article{PhysRevB.101.020411,
abstract = {We consider frustrated Heisenberg antiferromagnets, whose clean-limit ground state is characterized by noncollinear long-range order with nonzero vector chirality, and study the effects of quenched bond disorder, i.e., random exchange couplings. A single bond defect is known to induce a dipolar texture in the spin background independent of microscopic details. Using general analytical arguments as well as large-scale simulations for the classical triangular-lattice Heisenberg model, we show that any finite concentration of such defects destroys long-range order for spatial dimension d≤2, in favor of a glassy state whose correlation length in d=2 is exponentially large for small randomness. Our results are relevant for a wide range of layered frustrated magnets.},
added-at = {2020-03-20T11:56:45.000+0100},
author = {Dey, Santanu and Andrade, Eric C. and Vojta, Matthias},
biburl = {https://www.bibsonomy.org/bibtex/21e6b238fde2f49ce33b8d1e0482d1196/ctqmat},
day = 22,
description = {Phys. Rev. B 101, 020411(R) (2020) - Destruction of long-range order in noncollinear two-dimensional antiferromagnets by random-bond disorder},
doi = {10.1103/PhysRevB.101.020411},
interhash = {3edf6fff99ed9faa0da280e062b2054d},
intrahash = {1e6b238fde2f49ce33b8d1e0482d1196},
journal = {Phys. Rev. B},
keywords = {a b},
month = {01},
number = 2,
numpages = {5},
pages = 020411,
publisher = {American Physical Society},
timestamp = {2023-01-16T14:49:29.000+0100},
title = {Destruction of long-range order in noncollinear two-dimensional antiferromagnets by random-bond disorder},
url = {https://link.aps.org/doi/10.1103/PhysRevB.101.020411},
volume = 101,
year = 2020
}