Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal

Katayama, Naoyuki; Kimura, Kenta; Han, Yibo; Nasu, Joji; Drichko, Natalia; Nakanishi, Yoshiki; Halim, Mario; Ishiguro, Yuki; Satake, Ryuta; Nishibori, Eiji; Yoshizawa, Masahito; Nakano, Takehito; Nozue, Yasuo; Wakabayashi, Yusuke; Ishihara, Sumio; Hagiwara, Masayuki; Sawa, Hiroshi; Nakatsuji, Satoru

doi:10.1073/pnas.1508941112

Title: Absence of Jahn-Teller transition in the hexagonal Ba₃CuSb₂O₉ single crystal

Abstract

With decreasing temperature, liquids generally freeze into a solid state, losing entropy in the process. However, exceptions to this trend exist, such as quantum liquids, which may remain unfrozen down to absolute zero owing to strong quantum entanglement effects that stabilize a disordered state with zero entropy. Examples of such liquids include Bose-Einstein condensation of cold atoms, superconductivity, quantum Hall state of electron systems, and quantum spin liquid state in the frustrated magnets. Furthermore, recent studies have clarified the possibility of another exotic quantum liquid state based on the spin-orbital entanglement in FeSc2S4. To confirm this exotic ground state, experiments based on single-crystalline samples are essential. However, no such single-crystal study has been reported to date. Here, we report, to our knowledge, the first single-crystal study on the spin-orbital liquid candidate, 6H-Ba3CuSb2O9, and we have confirmed the absence of an orbital frozen state. In strongly correlated electron systems, orbital ordering usually appears at high temperatures in a process accompanied by a lattice deformation, called a static Jahn-Teller distortion. By combining synchrotron X-ray diffraction, electron spin resonance, Raman spectroscopy, and ultrasound measurements, we find that the static Jahn-Teller distortion is absent in the present material, which indicates that orbital ordering ismore »« less

Authors:

Katayama, Naoyuki ^[1]; Kimura, Kenta ^[2]; Han, Yibo ^[3]; Nasu, Joji ^[4]; Drichko, Natalia ^[5]; Nakanishi, Yoshiki ^[6]; Halim, Mario ^[2]; Ishiguro, Yuki ^[7]; Satake, Ryuta ^[1]; Nishibori, Eiji ^[1]; Yoshizawa, Masahito ^[6]; Nakano, Takehito ^[7]; Nozue, Yasuo ^[7]; Wakabayashi, Yusuke ^[7]; Ishihara, Sumio ^[4]; Hagiwara, Masayuki ^[7]; Sawa, Hiroshi ^[1]; Nakatsuji, Satoru ^[8]

Nagoya Univ. (Japan)
Univ. of Tokyo (Japan)
Osaka Univ. (Japan); Huzhong Univ. of Science and Technology, Wuhan (China)
Tohoku Univ., Sendai (Japan)
Johns Hopkins Univ., Baltimore, MD (United States)
Iwate Univ., Morioka (Japan)
Osaka Univ. (Japan)
Univ. of Tokyo (Japan); Japan Science and Technology Agency (JST), Saitama (Japan). PRESTO

Publication Date:: Mon Jul 13 00:00:00 EDT 2015

Research Org.:: Johns Hopkins Univ., Baltimore, MD (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1349036

Grant/Contract Number:: FG02-08ER46544

Resource Type:: Accepted Manuscript

Journal Name:: Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:: Journal Volume: 112; Journal Issue: 30; Journal ID: ISSN 0027-8424

Publisher:: National Academy of Sciences, Washington, DC (United States)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Ba3CuSb2O9; Jahn–Teller transition; quantum liquid state; spin-orbital entanglement; synchrotron X-ray diffraction

Citation Formats


                    Katayama, Naoyuki, Kimura, Kenta, Han, Yibo, Nasu, Joji, Drichko, Natalia, Nakanishi, Yoshiki, Halim, Mario, Ishiguro, Yuki, Satake, Ryuta, Nishibori, Eiji, Yoshizawa, Masahito, Nakano, Takehito, Nozue, Yasuo, Wakabayashi, Yusuke, Ishihara, Sumio, Hagiwara, Masayuki, Sawa, Hiroshi, and Nakatsuji, Satoru. Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal.  United States: N. p., 2015. 
Web.  doi:10.1073/pnas.1508941112.

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                    Katayama, Naoyuki, Kimura, Kenta, Han, Yibo, Nasu, Joji, Drichko, Natalia, Nakanishi, Yoshiki, Halim, Mario, Ishiguro, Yuki, Satake, Ryuta, Nishibori, Eiji, Yoshizawa, Masahito, Nakano, Takehito, Nozue, Yasuo, Wakabayashi, Yusuke, Ishihara, Sumio, Hagiwara, Masayuki, Sawa, Hiroshi, & Nakatsuji, Satoru. Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal.  United States.  https://doi.org/10.1073/pnas.1508941112

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                    Katayama, Naoyuki, Kimura, Kenta, Han, Yibo, Nasu, Joji, Drichko, Natalia, Nakanishi, Yoshiki, Halim, Mario, Ishiguro, Yuki, Satake, Ryuta, Nishibori, Eiji, Yoshizawa, Masahito, Nakano, Takehito, Nozue, Yasuo, Wakabayashi, Yusuke, Ishihara, Sumio, Hagiwara, Masayuki, Sawa, Hiroshi, and Nakatsuji, Satoru. Mon .  
"Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal".  United States.  https://doi.org/10.1073/pnas.1508941112.  https://www.osti.gov/servlets/purl/1349036.

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@article{osti_1349036,

  title        = {Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal},

  author       = {Katayama, Naoyuki and Kimura, Kenta and Han, Yibo and Nasu, Joji and Drichko, Natalia and Nakanishi, Yoshiki and Halim, Mario and Ishiguro, Yuki and Satake, Ryuta and Nishibori, Eiji and Yoshizawa, Masahito and Nakano, Takehito and Nozue, Yasuo and Wakabayashi, Yusuke and Ishihara, Sumio and Hagiwara, Masayuki and Sawa, Hiroshi and Nakatsuji, Satoru},

  abstractNote = {With decreasing temperature, liquids generally freeze into a solid state, losing entropy in the process. However, exceptions to this trend exist, such as quantum liquids, which may remain unfrozen down to absolute zero owing to strong quantum entanglement effects that stabilize a disordered state with zero entropy. Examples of such liquids include Bose-Einstein condensation of cold atoms, superconductivity, quantum Hall state of electron systems, and quantum spin liquid state in the frustrated magnets. Furthermore, recent studies have clarified the possibility of another exotic quantum liquid state based on the spin-orbital entanglement in FeSc2S4. To confirm this exotic ground state, experiments based on single-crystalline samples are essential. However, no such single-crystal study has been reported to date. Here, we report, to our knowledge, the first single-crystal study on the spin-orbital liquid candidate, 6H-Ba3CuSb2O9, and we have confirmed the absence of an orbital frozen state. In strongly correlated electron systems, orbital ordering usually appears at high temperatures in a process accompanied by a lattice deformation, called a static Jahn-Teller distortion. By combining synchrotron X-ray diffraction, electron spin resonance, Raman spectroscopy, and ultrasound measurements, we find that the static Jahn-Teller distortion is absent in the present material, which indicates that orbital ordering is suppressed down to the lowest temperatures measured. Lastly, we discuss how such an unusual feature is realized with the help of spin degree of freedom, leading to a spin-orbital entangled quantum liquid state.},

  doi          = {10.1073/pnas.1508941112},

  journal      = {Proceedings of the National Academy of Sciences of the United States of America},

  number       = 30,

  volume       = 112,

  place        = {United States},

  year         = {Mon Jul 13 00:00:00 EDT 2015},

  month        = {Mon Jul 13 00:00:00 EDT 2015}

}

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Man, Huiyuan; Halim, Mario; Sawa, Hiroshi
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Title: Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal

Abstract

Citation Formats

Raman phonons and Raman Jahn-Teller bands in perovskite-like manganites journal, January 2001

Singlet Ground State of the Quantum Antiferromagnet Ba 3 CuSb 2 O 9 journal, September 2012

Jahn-Teller effect in liquids: General principles and a molecular-dynamics simulation of the cupric ion in water journal, October 1992

Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice journal, May 2012

Spin-Orbital Quantum Liquid on the Honeycomb Lattice journal, November 2012

Raman-Scattering Selection-Rule Breaking and the Density of States in Amorphous Materials journal, July 1970

Highly Mobile Gapless Excitations in a Two-Dimensional Candidate Quantum Spin Liquid journal, June 2010

Mott localization in the correlated superconductor Cs 3 C 60 resulting from the molecular Jahn-Teller effect journal, April 2013

Phase diagram of the hexagonal lattice quantum dimer model journal, September 2001

Order-disorder in the Jahn-Teller transition of LaMnO 3 : A Raman scattering study journal, November 2000

Quantum Melting of Magnetic Order due to Orbital Fluctuations journal, April 1997

Spin Liquid State in the S = 1 / 2 Triangular Lattice Ba 3 CuSb 2 O 9 journal, April 2011

Exploring the spin-orbital ground state of Ba 3 CuSb 2 O 9 journal, September 2014

Spin-orbiton and quantum criticality in FeSc 2 S 4 journal, March 2015

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Spin-Orbital Singlet and Quantum Critical Point on the Diamond Lattice: FeSc 2 S 4 journal, March 2009

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Resonating valence bonds: A new kind of insulator? journal, February 1973

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Orbital liquid in ferromagnetic manganites: The orbital Hubbard model for e g electrons journal, April 2005

Spin-Liquid State in the S = 1 / 2 Hyperkagome Antiferromagnet Na 4 Ir 3 O 8 journal, September 2007

Orbital degeneracy as a source of frustration in LiNiO 2 journal, July 2004

Dynamical spin–orbital correlation in the frustrated magnet Ba3CuSb2O9 journal, June 2013

Spin Dynamics of the Spin- 1 / 2 Kagome Lattice Antiferromagnet ZnCu 3 ( OH ) 6 Cl 2 journal, March 2007

Spin Liquid State in an Organic Mott Insulator with a Triangular Lattice journal, September 2003

Frustration and entanglement in the t 2 g spin-orbital model on a triangular lattice: Valence-bond and generalized liquid states journal, September 2008

Die Kristallstruktur der Hexagonalen Verbindungen Ba3IIMeIISb2VO9. II. Ba3CuSb2O9 journal, July 1978

Chemical and orbital fluctuations in Ba 3 CuSb 2 O 9 journal, June 2016

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Title: Absence of Jahn-Teller transition in the hexagonal Ba₃CuSb₂O₉ single crystal

Raman phonons and Raman Jahn-Teller bands in perovskite-like manganites
journal, January 2001

Singlet Ground State of the Quantum Antiferromagnet ${Ba}_{3} {CuSb}_{2} O_{9}$
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Jahn-Teller effect in liquids: General principles and a molecular-dynamics simulation of the cupric ion in water
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Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice
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Spin-Orbital Quantum Liquid on the Honeycomb Lattice
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Raman-Scattering Selection-Rule Breaking and the Density of States in Amorphous Materials
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Highly Mobile Gapless Excitations in a Two-Dimensional Candidate Quantum Spin Liquid
journal, June 2010

Mott localization in the correlated superconductor Cs ₃ C ₆₀ resulting from the molecular Jahn-Teller effect
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Order-disorder in the Jahn-Teller transition of ${LaMnO}_{3} :$ A Raman scattering study
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journal, September 2014

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Doubly degenerate orbital system in honeycomb lattice: Implication of orbital state in layered iron oxide
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journal, February 1973

The emergence of resonating valence bond physics in spin–orbital models
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Orbital liquid in ferromagnetic manganites: The orbital Hubbard model for $e_{g}$ electrons
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Spin-Liquid State in the $S = 1 / 2$ Hyperkagome Antiferromagnet ${Na}_{4} {Ir}_{3} O_{8}$
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Orbital degeneracy as a source of frustration in ${LiNiO}_{2}$
journal, July 2004

Dynamical spin–orbital correlation in the frustrated magnet Ba3CuSb2O9
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Frustration and entanglement in the $t_{2 g}$ spin-orbital model on a triangular lattice: Valence-bond and generalized liquid states
journal, September 2008

Die Kristallstruktur der Hexagonalen Verbindungen Ba3IIMeIISb2VO9. II. Ba3CuSb2O9
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Quantum entanglement in the one-dimensional spin-orbital $SU (2) \otimes XXZ$ model
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