Spin excitations near the pressure-induced antiferromagnetic transition in SrCu2(BO3)2

Jeppe Jon Cederholm; Andrea Piovano; Alexandre Ivanov; Stefan Klotz; Arno Hiess; Ursula B. Hansen; Ekaterina Pomjakushina; Mohamed E. Zayed; Ellen Fogh; Henrik M. Rønnow

doi:10.1107/S1600576726003705

Spin excitations near the pressure-induced antiferromagnetic transition in SrCu₂(BO₃)₂

Jeppe Jon Cederholm
, Andrea Piovano
, Alexandre Ivanov
, Stefan Klotz
, Arno Hiess
, Ursula B. Hansen
, Ekaterina Pomjakushina
, Mohamed E. Zayed
, Ellen Fogh
, Henrik M. Rønnow

Assistant Professorship of Quantum Magnetism

Institut Laue-Langevin
École Polytechnique Fédérale de Lausanne (EPFL)
Centre de Recherche Institut du Cerveau et de la Moelle
European Spallation Source (ESS)
Paul Scherrer Institut
Carnegie Mellon University in Qatar

Research output: Contribution to journal › Article › peer-review

Abstract

SrCu₂(BO₃)₂ is a frustrated quantum magnet which realizes the Shastry–Sutherland model. The system exhibits a sequence of pressure-induced phases, including a long-range antiferromagnetically ordered state. We have performed inelastic neutron scattering experiments on a single crystal at 4.2 (2) GPa, in the antiferromagnetic phase. The observed dispersive spin excitations were modeled using linear-spin-wave theory to extract exchange parameters. Our results are consistent with previously reported parameters at higher pressures and confirm the existence of a Goldstone mode as well as underlining the importance of the interlayer coupling. These results complement previous high-pressure studies and provide further input for theoretical models of SrCu₂(BO₃)₂ under extreme conditions.

Original language	English
Pages (from-to)	804-808
Number of pages	5
Journal	Journal of Applied Crystallography
Volume	59
DOIs	https://doi.org/10.1107/S1600576726003705
State	Published - 1 Jun 2026

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title = "Spin excitations near the pressure-induced antiferromagnetic transition in SrCu2(BO3)2",

abstract = "SrCu2(BO3)2 is a frustrated quantum magnet which realizes the Shastry–Sutherland model. The system exhibits a sequence of pressure-induced phases, including a long-range antiferromagnetically ordered state. We have performed inelastic neutron scattering experiments on a single crystal at 4.2 (2) GPa, in the antiferromagnetic phase. The observed dispersive spin excitations were modeled using linear-spin-wave theory to extract exchange parameters. Our results are consistent with previously reported parameters at higher pressures and confirm the existence of a Goldstone mode as well as underlining the importance of the interlayer coupling. These results complement previous high-pressure studies and provide further input for theoretical models of SrCu2(BO3)2 under extreme conditions.",

author = "Cederholm, \{Jeppe Jon\} and Andrea Piovano and Alexandre Ivanov and Stefan Klotz and Arno Hiess and Hansen, \{Ursula B.\} and Ekaterina Pomjakushina and Zayed, \{Mohamed E.\} and Ellen Fogh and R{\o}nnow, \{Henrik M.\}",

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doi = "10.1107/S1600576726003705",

language = "English",

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TY - JOUR

T1 - Spin excitations near the pressure-induced antiferromagnetic transition in SrCu2(BO3)2

AU - Cederholm, Jeppe Jon

AU - Piovano, Andrea

AU - Ivanov, Alexandre

AU - Klotz, Stefan

AU - Hiess, Arno

AU - Hansen, Ursula B.

AU - Pomjakushina, Ekaterina

AU - Zayed, Mohamed E.

AU - Fogh, Ellen

AU - Rønnow, Henrik M.

PY - 2026/6/1

Y1 - 2026/6/1

N2 - SrCu2(BO3)2 is a frustrated quantum magnet which realizes the Shastry–Sutherland model. The system exhibits a sequence of pressure-induced phases, including a long-range antiferromagnetically ordered state. We have performed inelastic neutron scattering experiments on a single crystal at 4.2 (2) GPa, in the antiferromagnetic phase. The observed dispersive spin excitations were modeled using linear-spin-wave theory to extract exchange parameters. Our results are consistent with previously reported parameters at higher pressures and confirm the existence of a Goldstone mode as well as underlining the importance of the interlayer coupling. These results complement previous high-pressure studies and provide further input for theoretical models of SrCu2(BO3)2 under extreme conditions.

AB - SrCu2(BO3)2 is a frustrated quantum magnet which realizes the Shastry–Sutherland model. The system exhibits a sequence of pressure-induced phases, including a long-range antiferromagnetically ordered state. We have performed inelastic neutron scattering experiments on a single crystal at 4.2 (2) GPa, in the antiferromagnetic phase. The observed dispersive spin excitations were modeled using linear-spin-wave theory to extract exchange parameters. Our results are consistent with previously reported parameters at higher pressures and confirm the existence of a Goldstone mode as well as underlining the importance of the interlayer coupling. These results complement previous high-pressure studies and provide further input for theoretical models of SrCu2(BO3)2 under extreme conditions.

UR - https://www.scopus.com/pages/publications/105040785131

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DO - 10.1107/S1600576726003705

M3 - Article

AN - SCOPUS:105040785131

SN - 0021-8898

VL - 59

SP - 804

EP - 808

JO - Journal of Applied Crystallography

JF - Journal of Applied Crystallography

ER -

Spin excitations near the pressure-induced antiferromagnetic transition in SrCu₂(BO₃)₂

Abstract

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