Quantum spin chains with frustration due to Dzyaloshinskii-Moriya interactions

Quantum spin chains with frustration due to Dzyaloshinskii-Moriya interactions

The properties of two quantum spin chain materials, K\(_2\)CuSO\(_4\)Cl\(_2\) and K\(_2\)CuSO\(_4\)Br\(_2\), are studied by a variety of experimental techniques, including bulk measurements, neutron spectroscopy and ESR. The hierarchy of relevant terms in the magnetic Hamiltonian is established. It...

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Veröffentlicht in:arXiv.org 2014-10
Hauptverfasser: Hälg, Manuel, Lorenz, Wolfram E A, Kirill Yu Povarov, Månsson, Martin, Skourski, Yurii, Zheludev, Andrey
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Chains
Frustration
Phase diagrams
Physics - Strongly Correlated Electrons
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Kirill Yu Povarov
Månsson, Martin
Skourski, Yurii
Zheludev, Andrey
description The properties of two quantum spin chain materials, K\(_2\)CuSO\(_4\)Cl\(_2\) and K\(_2\)CuSO\(_4\)Br\(_2\), are studied by a variety of experimental techniques, including bulk measurements, neutron spectroscopy and ESR. The hierarchy of relevant terms in the magnetic Hamiltonian is established. It is shown that these two compounds feature substantial Dzyaloshinskii-Moriya (DM) interactions that are uniform within each chain, but antiparallel in adjacent chains. The result is a peculiar type of frustration of inter-chain interactions, which leads to an unusual field-temperature phase diagram.
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subjects Chains
Frustration
Phase diagrams
Physics - Strongly Correlated Electrons
title Quantum spin chains with frustration due to Dzyaloshinskii-Moriya interactions
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