6-GHz lattice response in a quantum spin-orbital liquid probed by time-resolved resonant x-ray scattering

被引：1

作者：

Takubo, Kou ^{[1
,2
]}

Mizokawa, Takashi ^{[3
]}

Man, Huiyuan ^{[1
,4
,5
]}

Yamamoto, Kohei ^{[1
]}

Zhang, Yujun ^{[1
]}

Hirata, Yasuyuki ^{[1
]}

Wadati, Hiroki ^{[1
,6
]}

Khomskii, Daniel, I ^{[7
]}

Nakatsuji, Satoru ^{[1
,4
,5
,8
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

[3] Waseda Univ, Dept Appl Phys, Okubo, Tokyo 2778581, Japan

[4] Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA

[5] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[6] Univ Hyogo, Grad Sch Mat Sci, Koto, Hyogo 6781297, Japan

[7] Univ Cologne, Phys Inst 2, Zulpicher Str, D-50937 Cologne, Germany

[8] Univ Tokyo, Dept Phys, Hongo, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 20期

关键词：

ORDER;

D O I：

10.1103/PhysRevB.104.205110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Long-sought quantum spin liquids usually emerge in geometrically frustrated magnets. Less commonly, unfrustrated magnets can harbor a variety of quantum spin liquids if charge and/or orbital degrees of freedom are involved. Jahn-Teller distortion of Cu2+O6 octahedra is absent in hexagonal Ba3CuSb2O9 suggesting a Cu 3d spin-orbital liquid state. Here, by means of time-resolved resonant x-ray scattering, we show that hexagonal Ba3CuSb2O9 exhibits a charge-orbital dynamics which is absent in the orthorhombic phase of Ba3CuSb2O9 with Jahn-Teller distortion and Cu 3d orbital order. The time scale of charge-orbital dynamics manifests in the coherent phonons at 6 GHz. The present work reveals a role of electron-lattice entanglement in the quantum spin-orbital liquid state.

引用

页数：5

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