Thermally populated versus field-induced triplon bound states in the Shastry-Sutherland lattice SrCu2(BO3)2

被引：4

作者：

Wulferding, Dirk ^{[1
,2
]}

Choi, Youngsu ^{[3
]}

Lee, Seungyeol ^{[3
]}

Prosnikov, Mikhail A. ^{[4
]}

Gallais, Yann ^{[5
]}

Lemmens, Peter ^{[6
]}

Zhong, Chengchao ^{[7
]}

Kageyama, Hiroshi ^{[7
]}

Choi, Kwang-Yong ^{[8
]}

机构：

[1] Inst for Basic Sci Korea, Ctr Correlated Electron Syst, Seoul 08826, South Korea

[2] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[3] Chung Ang Univ, Dept Phys, Seoul 06974, South Korea

[4] Radboud Univ Nijmegen, High Field Magnet Lab HFML EMFL, NL-6525 ED Nijmegen, Netherlands

[5] Univ Paris, Lab Mat & Phenomenes Quant, CNRS, F-75013 Paris, France

[6] TU Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany

[7] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Kyoto 6158510, Japan

[8] Sungkyunkwan Univ, Dept Phys, Suwon 16419, South Korea

来源：

NPJ QUANTUM MATERIALS | 2021年 / 6卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

DIMER GROUND-STATE; MAGNETIZATION PLATEAUS; SPIN; MODEL; EXCITATIONS; SCATTERING; LIGHT; WAVE;

D O I：

10.1038/s41535-021-00405-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Shastry-Sutherland compound SrCu2(BO3)(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.

引用

页数：6