Field-induced bound-state condensation and spin-nematic phase in SrCu2(BO3)2 revealed by neutron scattering up to 25.9 T

Ellen Fogh; Mithilesh Nayak; Oleksandr Prokhnenko; Maciej Bartkowiak; Koji Munakata; Jian Rui Soh; Alexandra A. Turrini; Mohamed E. Zayed; Ekaterina Pomjakushina; Hiroshi Kageyama; Hiroyuki Nojiri; Kazuhisa Kakurai; Bruce Normand; Frédéric Mila; Henrik M. Rønnow

doi:10.1038/s41467-023-44115-z

Field-induced bound-state condensation and spin-nematic phase in SrCu₂(BO₃)₂ revealed by neutron scattering up to 25.9 T

Ellen Fogh
, Mithilesh Nayak
, Oleksandr Prokhnenko
, Maciej Bartkowiak
, Koji Munakata
, Jian Rui Soh
, Alexandra A. Turrini
, Mohamed E. Zayed
, Ekaterina Pomjakushina
, Hiroshi Kageyama
, Hiroyuki Nojiri
, Kazuhisa Kakurai
, Bruce Normand
, Frédéric Mila
, Henrik M. Rønnow

École Polytechnique Fédérale de Lausanne (EPFL)
Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)
Rutherford Appleton Laboratory
Comprehensive Research Organization for Science and Society
Paul Scherrer Institute
Carnegie Mellon University in Qatar
Paul Scherrer Institut
Graduate School of Engineering
Tohoku University

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

18 Scopus citations

Abstract

In quantum magnetic materials, ordered phases induced by an applied magnetic field can be described as the Bose-Einstein condensation (BEC) of magnon excitations. In the strongly frustrated system SrCu₂(BO₃)₂, no clear magnon BEC could be observed, pointing to an alternative mechanism, but the high fields required to probe this physics have remained a barrier to detailed investigation. Here we exploit the first purpose-built high-field neutron scattering facility to measure the spin excitations of SrCu₂(BO₃)₂ up to 25.9 T and use cylinder matrix-product-states (MPS) calculations to reproduce the experimental spectra with high accuracy. Multiple unconventional features point to a condensation of S = 2 bound states into a spin-nematic phase, including the gradients of the one-magnon branches and the persistence of a one-magnon spin gap. This gap reflects a direct analogy with superconductivity, suggesting that the spin-nematic phase in SrCu₂(BO₃)₂ is best understood as a condensate of bosonic Cooper pairs.

Original language	English
Article number	442
Journal	Nature Communications
Volume	15
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-44115-z
State	Published - Dec 2024
Externally published	Yes

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Fogh, E., Nayak, M., Prokhnenko, O., Bartkowiak, M., Munakata, K., Soh, J. R., Turrini, A. A., Zayed, M. E., Pomjakushina, E., Kageyama, H., Nojiri, H., Kakurai, K., Normand, B., Mila, F., & Rønnow, H. M. (2024). Field-induced bound-state condensation and spin-nematic phase in SrCu₂(BO₃)₂ revealed by neutron scattering up to 25.9 T. Nature Communications, 15(1), Article 442. https://doi.org/10.1038/s41467-023-44115-z

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title = "Field-induced bound-state condensation and spin-nematic phase in SrCu2(BO3)2 revealed by neutron scattering up to 25.9 T",

abstract = "In quantum magnetic materials, ordered phases induced by an applied magnetic field can be described as the Bose-Einstein condensation (BEC) of magnon excitations. In the strongly frustrated system SrCu2(BO3)2, no clear magnon BEC could be observed, pointing to an alternative mechanism, but the high fields required to probe this physics have remained a barrier to detailed investigation. Here we exploit the first purpose-built high-field neutron scattering facility to measure the spin excitations of SrCu2(BO3)2 up to 25.9 T and use cylinder matrix-product-states (MPS) calculations to reproduce the experimental spectra with high accuracy. Multiple unconventional features point to a condensation of S = 2 bound states into a spin-nematic phase, including the gradients of the one-magnon branches and the persistence of a one-magnon spin gap. This gap reflects a direct analogy with superconductivity, suggesting that the spin-nematic phase in SrCu2(BO3)2 is best understood as a condensate of bosonic Cooper pairs.",

author = "Ellen Fogh and Mithilesh Nayak and Oleksandr Prokhnenko and Maciej Bartkowiak and Koji Munakata and Soh, \{Jian Rui\} and Turrini, \{Alexandra A.\} and Zayed, \{Mohamed E.\} and Ekaterina Pomjakushina and Hiroshi Kageyama and Hiroyuki Nojiri and Kazuhisa Kakurai and Bruce Normand and Fr{\'e}d{\'e}ric Mila and R{\o}nnow, \{Henrik M.\}",

note = "Publisher Copyright: {\textcopyright} 2024, The Author(s).",

year = "2024",

month = dec,

doi = "10.1038/s41467-023-44115-z",

language = "English",

volume = "15",

journal = "Nature Communications",

issn = "2041-1723",

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number = "1",

}

Fogh, E, Nayak, M, Prokhnenko, O, Bartkowiak, M, Munakata, K, Soh, JR, Turrini, AA, Zayed, ME, Pomjakushina, E, Kageyama, H, Nojiri, H, Kakurai, K, Normand, B, Mila, F & Rønnow, HM 2024, 'Field-induced bound-state condensation and spin-nematic phase in SrCu₂(BO₃)₂ revealed by neutron scattering up to 25.9 T', Nature Communications, vol. 15, no. 1, 442. https://doi.org/10.1038/s41467-023-44115-z

TY - JOUR

T1 - Field-induced bound-state condensation and spin-nematic phase in SrCu2(BO3)2 revealed by neutron scattering up to 25.9 T

AU - Fogh, Ellen

AU - Nayak, Mithilesh

AU - Prokhnenko, Oleksandr

AU - Bartkowiak, Maciej

AU - Munakata, Koji

AU - Soh, Jian Rui

AU - Turrini, Alexandra A.

AU - Zayed, Mohamed E.

AU - Pomjakushina, Ekaterina

AU - Kageyama, Hiroshi

AU - Nojiri, Hiroyuki

AU - Kakurai, Kazuhisa

AU - Normand, Bruce

AU - Mila, Frédéric

AU - Rønnow, Henrik M.

PY - 2024/12

Y1 - 2024/12

N2 - In quantum magnetic materials, ordered phases induced by an applied magnetic field can be described as the Bose-Einstein condensation (BEC) of magnon excitations. In the strongly frustrated system SrCu2(BO3)2, no clear magnon BEC could be observed, pointing to an alternative mechanism, but the high fields required to probe this physics have remained a barrier to detailed investigation. Here we exploit the first purpose-built high-field neutron scattering facility to measure the spin excitations of SrCu2(BO3)2 up to 25.9 T and use cylinder matrix-product-states (MPS) calculations to reproduce the experimental spectra with high accuracy. Multiple unconventional features point to a condensation of S = 2 bound states into a spin-nematic phase, including the gradients of the one-magnon branches and the persistence of a one-magnon spin gap. This gap reflects a direct analogy with superconductivity, suggesting that the spin-nematic phase in SrCu2(BO3)2 is best understood as a condensate of bosonic Cooper pairs.

AB - In quantum magnetic materials, ordered phases induced by an applied magnetic field can be described as the Bose-Einstein condensation (BEC) of magnon excitations. In the strongly frustrated system SrCu2(BO3)2, no clear magnon BEC could be observed, pointing to an alternative mechanism, but the high fields required to probe this physics have remained a barrier to detailed investigation. Here we exploit the first purpose-built high-field neutron scattering facility to measure the spin excitations of SrCu2(BO3)2 up to 25.9 T and use cylinder matrix-product-states (MPS) calculations to reproduce the experimental spectra with high accuracy. Multiple unconventional features point to a condensation of S = 2 bound states into a spin-nematic phase, including the gradients of the one-magnon branches and the persistence of a one-magnon spin gap. This gap reflects a direct analogy with superconductivity, suggesting that the spin-nematic phase in SrCu2(BO3)2 is best understood as a condensate of bosonic Cooper pairs.

UR - https://www.scopus.com/pages/publications/85181918130

U2 - 10.1038/s41467-023-44115-z

DO - 10.1038/s41467-023-44115-z

M3 - Article

C2 - 38200029

AN - SCOPUS:85181918130

SN - 2041-1723

VL - 15

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 442

ER -

Field-induced bound-state condensation and spin-nematic phase in SrCu₂(BO₃)₂ revealed by neutron scattering up to 25.9 T

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