Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets

A. Zheludev; V. O. Garlea; L. P. Regnault; H. Manaka; A. Tsvelik; J. H. Chung

doi:10.1103/PhysRevLett.100.157204

Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets

A. Zheludev, V. O. Garlea, L. P. Regnault, H. Manaka, A. Tsvelik, J. H. Chung

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38 Citations (Scopus)

Abstract

Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH3)2CHNH3CuCL3 (IPA-CuCl3, where IPA denotes isopropyl ammonium) and Cu2Cl4•D8C4SO2 (Sul-Cu2Cl4) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear σ-models. It is found that when the T=0 energy gap Δ is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to κT∼1.5Δ.

Original language	English
Article number	157204
Journal	Physical review letters
Volume	100
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.100.157204
Publication status	Published - 2008 Apr 16

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.100.157204

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abstract = "Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH3)2CHNH3CuCL3 (IPA-CuCl3, where IPA denotes isopropyl ammonium) and Cu2Cl4•D8C4SO2 (Sul-Cu2Cl4) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear σ-models. It is found that when the T=0 energy gap Δ is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to κT∼1.5Δ.",

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T1 - Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets

AU - Zheludev, A.

AU - Garlea, V. O.

AU - Regnault, L. P.

AU - Manaka, H.

AU - Tsvelik, A.

AU - Chung, J. H.

PY - 2008/4/16

Y1 - 2008/4/16

N2 - Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH3)2CHNH3CuCL3 (IPA-CuCl3, where IPA denotes isopropyl ammonium) and Cu2Cl4•D8C4SO2 (Sul-Cu2Cl4) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear σ-models. It is found that when the T=0 energy gap Δ is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to κT∼1.5Δ.

AB - Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH3)2CHNH3CuCL3 (IPA-CuCl3, where IPA denotes isopropyl ammonium) and Cu2Cl4•D8C4SO2 (Sul-Cu2Cl4) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear σ-models. It is found that when the T=0 energy gap Δ is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to κT∼1.5Δ.

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Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets

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