Excitations in a quantum spin liquid with random bonds

D. Hüvonen; S. Zhao; G. Ehlers; M. Månsson; S. N. Gvasaliya; A. Zheludev

doi:10.1103/PhysRevB.86.214408

Excitations in a quantum spin liquid with random bonds

D. Hüvonen, S. Zhao, G. Ehlers, M. Månsson, S. N. Gvasaliya, A. Zheludev

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18 Scopus citations

Abstract

We present the results of an inelastic neutron-scattering study on two bond disordered quasi-two-dimensional quantum magnets (C₄H ₁₂N₂)Cu₂(Cl_1-xBr_x) ₆ with x=0.035 and 0.075. We observe an increase of spin gap, a reduction of magnon bandwidth, and a decrease of magnon lifetimes compared to the x=0 sample. Additional magnon damping is observed at higher energies away from the zone center, which is found to follow the density of single-particle states.

Original language	English
Article number	214408
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.86.214408
State	Published - Dec 10 2012

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10.1103/PhysRevB.86.214408

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abstract = "We present the results of an inelastic neutron-scattering study on two bond disordered quasi-two-dimensional quantum magnets (C4H 12N2)Cu2(Cl1-xBrx) 6 with x=0.035 and 0.075. We observe an increase of spin gap, a reduction of magnon bandwidth, and a decrease of magnon lifetimes compared to the x=0 sample. Additional magnon damping is observed at higher energies away from the zone center, which is found to follow the density of single-particle states.",

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AU - Hüvonen, D.

AU - Zhao, S.

AU - Ehlers, G.

AU - Månsson, M.

AU - Gvasaliya, S. N.

AU - Zheludev, A.

PY - 2012/12/10

Y1 - 2012/12/10

N2 - We present the results of an inelastic neutron-scattering study on two bond disordered quasi-two-dimensional quantum magnets (C4H 12N2)Cu2(Cl1-xBrx) 6 with x=0.035 and 0.075. We observe an increase of spin gap, a reduction of magnon bandwidth, and a decrease of magnon lifetimes compared to the x=0 sample. Additional magnon damping is observed at higher energies away from the zone center, which is found to follow the density of single-particle states.

AB - We present the results of an inelastic neutron-scattering study on two bond disordered quasi-two-dimensional quantum magnets (C4H 12N2)Cu2(Cl1-xBrx) 6 with x=0.035 and 0.075. We observe an increase of spin gap, a reduction of magnon bandwidth, and a decrease of magnon lifetimes compared to the x=0 sample. Additional magnon damping is observed at higher energies away from the zone center, which is found to follow the density of single-particle states.

UR - https://www.scopus.com/pages/publications/84871089323

U2 - 10.1103/PhysRevB.86.214408

DO - 10.1103/PhysRevB.86.214408

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 21

M1 - 214408

ER -

Excitations in a quantum spin liquid with random bonds

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