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

Kou Takubo; Takashi Mizokawa; Huiyuan Man; Kohei Yamamoto; Yujun Zhang; Yasuyuki Hirata; Hiroki Wadati; Daniel I. Khomskii; Satoru Nakatsuji

doi:10.1103/PhysRevB.104.205110

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

Kou Takubo, Takashi Mizokawa, Huiyuan Man, Kohei Yamamoto, Yujun Zhang, Yasuyuki Hirata, Hiroki Wadati, Daniel I. Khomskii, Satoru Nakatsuji

先進理工学部

研究成果: Article › 査読

1 被引用数 (Scopus)

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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.

本文言語	English
論文番号	205110
ジャーナル	Physical Review B
巻	104
号	20
DOI	https://doi.org/10.1103/PhysRevB.104.205110
出版ステータス	Published - 2021 11月 15

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

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10.1103/PhysRevB.104.205110

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

abstract = "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.",

author = "Kou Takubo and Takashi Mizokawa and Huiyuan Man and Kohei Yamamoto and Yujun Zhang and Yasuyuki Hirata and Hiroki Wadati and Khomskii, {Daniel I.} and Satoru Nakatsuji",

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AU - Takubo, Kou

AU - Mizokawa, Takashi

AU - Man, Huiyuan

AU - Yamamoto, Kohei

AU - Zhang, Yujun

AU - Hirata, Yasuyuki

AU - Wadati, Hiroki

AU - Khomskii, Daniel I.

AU - Nakatsuji, Satoru

PY - 2021/11/15

Y1 - 2021/11/15

N2 - 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.

AB - 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.

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

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