Details
| Original language | English |
|---|---|
| Edition | 1 |
| Volume | 6 |
| Publication status | Published - 17 Dec 2021 |
| Externally published | Yes |
Publication series
| Name | npj Quantum Materials |
|---|---|
| ISSN (Print) | 2397-4648 |
Abstract
The Shastry–Sutherland compound SrCu 2(BO 3) 2 constituting orthogonally coupled dimers harbors an S = 0 singlet ground state. The confluence of strong interdimer interaction and frustration engenders a spectrum of low-energy excitations including localized triplons as well as singlet and triplet bound states. Their dynamics are controlled by an external magnetic field and temperature. Here, we employ high-field Raman spectroscopy to map the field and temperature evolution of such bosonic composite quasiparticles on approaching the 1/8 magnetization plateau. Our study unveils that the magnetic field and thermal fluctuations show remarkably similar effects in melting the singlet bound states, but are disparate in their effects on the fine spectral shapes. This, together with the anti-crossing of two singlet bound states in the intermediate field B = 10 − 16 T, is discussed in terms of the correlated dynamics of frustrated, interacting bosons.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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1 ed. 2021. (npj Quantum Materials).
Research output: Other contribution › Other publication › Research › peer review
}
TY - GEN
T1 - Thermally populated versus field-induced triplon bound states in the Shastry-Sutherland lattice SrCu2(BO3)(2)
AU - Wulferding, Dirk
AU - Choi, Youngsu
AU - Lee, Seungyeol
AU - Prosnikov, Mikhail A.
AU - Gallais, Yann
AU - Lemmens, Peter
AU - Zhong, Chengchao
AU - Kageyama, Hiroshi
AU - Choi, Kwang-Yong
N1 - Funding information: This work was supported by the Institute for Basic Science in Korea (Grant No. IBS-R009-Y3), and by HFML-RU/NWO-I, a member of the European Magnetic Field Laboratory (EMFL). K.-Y.C., Y.G., Y.C., and S.L. acknowledge funding from “PHC Star Grant 2020” (Grant No. 45827YG). K.-Y.C. was supported by the National Research Foundation (NRF) of Korea (Grant Nos. 2020R1A2C3012367 and 2020R1A5A1016518). P.L. was supported by DFG Excellence Cluster QuantumFrontiers, EXC 2123, DFG Le967/16-1, DFG-RTG 1952/1, and the Quantum-and Nano-Metrology (QUANOMET) initiative of Lower Saxony within project NL-4.
PY - 2021/12/17
Y1 - 2021/12/17
N2 - The Shastry–Sutherland compound SrCu 2(BO 3) 2 constituting orthogonally coupled dimers harbors an S = 0 singlet ground state. The confluence of strong interdimer interaction and frustration engenders a spectrum of low-energy excitations including localized triplons as well as singlet and triplet bound states. Their dynamics are controlled by an external magnetic field and temperature. Here, we employ high-field Raman spectroscopy to map the field and temperature evolution of such bosonic composite quasiparticles on approaching the 1/8 magnetization plateau. Our study unveils that the magnetic field and thermal fluctuations show remarkably similar effects in melting the singlet bound states, but are disparate in their effects on the fine spectral shapes. This, together with the anti-crossing of two singlet bound states in the intermediate field B = 10 − 16 T, is discussed in terms of the correlated dynamics of frustrated, interacting bosons.
AB - The Shastry–Sutherland compound SrCu 2(BO 3) 2 constituting orthogonally coupled dimers harbors an S = 0 singlet ground state. The confluence of strong interdimer interaction and frustration engenders a spectrum of low-energy excitations including localized triplons as well as singlet and triplet bound states. Their dynamics are controlled by an external magnetic field and temperature. Here, we employ high-field Raman spectroscopy to map the field and temperature evolution of such bosonic composite quasiparticles on approaching the 1/8 magnetization plateau. Our study unveils that the magnetic field and thermal fluctuations show remarkably similar effects in melting the singlet bound states, but are disparate in their effects on the fine spectral shapes. This, together with the anti-crossing of two singlet bound states in the intermediate field B = 10 − 16 T, is discussed in terms of the correlated dynamics of frustrated, interacting bosons.
UR - http://www.scopus.com/inward/record.url?scp=85121568706&partnerID=8YFLogxK
U2 - 10.1038/s41535-021-00405-7
DO - 10.1038/s41535-021-00405-7
M3 - Other publication
VL - 6
T3 - npj Quantum Materials
ER -