Unveiling new quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2 up to the saturation magnetic field

被引：19

作者：

Nomura, T. ^{[1
,2
]}

Corboz, P. ^{[3
,4
]}

Miyata, A. ^{[5
]}

Zherlitsyn, S. ^{[5
]}

Ishii, Y. ^{[1
]}

Kohama, Y. ^{[1
]}

Matsuda, Y. H. ^{[1
]}

Ikeda, A. ^{[6
]}

Zhong, C. ^{[7
,9
]}

Kageyama, H. ^{[7
]}

Mila, F. ^{[8
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba, Japan

[2] Tokyo Denki Univ, Adachi, Tokyo, Japan

[3] Univ Amsterdam, Inst Theoret Phys, Amsterdam, Netherlands

[4] Univ Amsterdam, Delta Inst Theoret Phys, Amsterdam, Netherlands

[5] Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlabor Dresden HLD EMFL, Dresden, Germany

[6] Univ Electrocommun, Dept Engn Sci, Chofu, Tokyo, Japan

[7] Kyoto Univ, Grad Sch Engn, Nishikyouku, Nishikyouku, Kyoto, Japan

[8] Ecole Polytech Fed Lausanne EPFL, Inst Theoret Phys, Lausanne, Switzerland

[9] Ritsumeikan Univ, Dept Appl Chem, Kusatsu, Shiga, Japan

来源：

NATURE COMMUNICATIONS | 2023年 / 14卷 / 01期

基金：

欧洲研究理事会; 瑞士国家科学基金会;

关键词：

DIMER GROUND-STATE; MODEL; PLATEAUS; TRANSITIONS; WAVE;

D O I：

10.1038/s41467-023-39502-5

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Under magnetic fields, quantum magnets often undergo exotic phase transitions with various kinds of order. The discovery of a sequence of fractional magnetization plateaus in the Shastry-Sutherland compound SrCu2(BO3)(2) has played a central role in the high-field research on quantum materials, but so far this system could only be probed up to half the saturation value of the magnetization. Here, we report the first experimental and theoretical investigation of this compound up to the saturation magnetic field of 140 T and beyond. Using ultrasound and magnetostriction techniques combined with extensive tensor-network calculations (iPEPS), several spin-supersolid phases are revealed between the 1/2 plateau and saturation (1/1 plateau). Quite remarkably, the sound velocity of the 1/2 plateau exhibits a drastic decrease of -50%, related to the tetragonal-to-orthorhombic instability of the checkerboard-type magnon crystal. The unveiled nature of this paradigmatic quantum system is a new milestone for exploring exotic quantum states of matter emerging in extreme conditions. The Shastry-Sutherland compound SrCu2(BO3)(2) is a frustrated magnet that displays multiple magnetization plateaus in high magnetic fields. Nomura et al. report ultrasound and magnetostriction experiments reaching the saturation field for the first time and reveal new features in the phase diagram.

引用

页数：7

共 53 条

[1] Competing States in the t-J Model: Uniform d-Wave State versus Stripe State [J].