Longitudinal magnon in the tetrahedral spin system Cu2Te2O5Br2 near quantum criticality

C. Gros; P. Lemmens; M. Vojta; R. Valentí; K. Y. Choi; H. Kageyama; Z. Hiroi; N. V. Mushnikov; T. Goto; M. Johnsson; P. Millet

doi:10.1103/PhysRevB.67.174405

Longitudinal magnon in the tetrahedral spin system Cu₂Te₂O₅Br₂ near quantum criticality

C. Gros, P. Lemmens, M. Vojta, R. Valentí, K. Y. Choi, H. Kageyama, Z. Hiroi, N. V. Mushnikov, T. Goto, M. Johnsson, P. Millet

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Abstract

We present a comprehensive study of the coupled tetrahedra compound Cu₂Te₂O₅Br₂ by theory and experiments in external magnetic fields. We report the observation of a longitudinal magnon in Raman scattering in the ordered state close to quantum criticality. We show that the excited tetrahedral-singlet sets the energy scale for the magnetic ordering temperature T_N. This energy is determined experimentally. The ordering temperature T_N has an inverse-log dependence on the coupling parameters near quantum criticality.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	67
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.67.174405
State	Published - 8 May 2003
Externally published	Yes

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title = "Longitudinal magnon in the tetrahedral spin system Cu2Te2O5Br2 near quantum criticality",

abstract = "We present a comprehensive study of the coupled tetrahedra compound Cu2Te2O5Br2 by theory and experiments in external magnetic fields. We report the observation of a longitudinal magnon in Raman scattering in the ordered state close to quantum criticality. We show that the excited tetrahedral-singlet sets the energy scale for the magnetic ordering temperature TN. This energy is determined experimentally. The ordering temperature TN has an inverse-log dependence on the coupling parameters near quantum criticality.",

author = "C. Gros and P. Lemmens and M. Vojta and R. Valent{\'i} and Choi, \{K. Y.\} and H. Kageyama and Z. Hiroi and Mushnikov, \{N. V.\} and T. Goto and M. Johnsson and P. Millet",

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doi = "10.1103/PhysRevB.67.174405",

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T1 - Longitudinal magnon in the tetrahedral spin system Cu2Te2O5Br2 near quantum criticality

AU - Gros, C.

AU - Lemmens, P.

AU - Vojta, M.

AU - Valentí, R.

AU - Choi, K. Y.

AU - Kageyama, H.

AU - Hiroi, Z.

AU - Mushnikov, N. V.

AU - Goto, T.

AU - Johnsson, M.

AU - Millet, P.

PY - 2003/5/8

Y1 - 2003/5/8

N2 - We present a comprehensive study of the coupled tetrahedra compound Cu2Te2O5Br2 by theory and experiments in external magnetic fields. We report the observation of a longitudinal magnon in Raman scattering in the ordered state close to quantum criticality. We show that the excited tetrahedral-singlet sets the energy scale for the magnetic ordering temperature TN. This energy is determined experimentally. The ordering temperature TN has an inverse-log dependence on the coupling parameters near quantum criticality.

AB - We present a comprehensive study of the coupled tetrahedra compound Cu2Te2O5Br2 by theory and experiments in external magnetic fields. We report the observation of a longitudinal magnon in Raman scattering in the ordered state close to quantum criticality. We show that the excited tetrahedral-singlet sets the energy scale for the magnetic ordering temperature TN. This energy is determined experimentally. The ordering temperature TN has an inverse-log dependence on the coupling parameters near quantum criticality.

UR - https://www.scopus.com/pages/publications/0038236957

U2 - 10.1103/PhysRevB.67.174405

DO - 10.1103/PhysRevB.67.174405

M3 - Article

AN - SCOPUS:0038236957

SN - 1098-0121

VL - 67

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 17

ER -

Longitudinal magnon in the tetrahedral spin system Cu₂Te₂O₅Br₂ near quantum criticality

Abstract

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