Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K3Cu3AlO2(SO4)4

Masayoshi Fujihala; Hiroko Koorikawa; Setsuo Mitsuda; Katsuhiro Morita; Takami Tohyama; Keisuke Tomiyasu; Akihiro Koda; Hirotaka Okabe; Shinichi Itoh; Tetsuya Yokoo; Soshi Ibuka; Makoto Tadokoro; Masaki Itoh; Hajime Sagayama; Reiji Kumai; Youichi Murakami

doi:10.1038/s41598-017-16935-9

Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K₃Cu₃AlO₂(SO₄)₄

Masayoshi Fujihala, Hiroko Koorikawa, Setsuo Mitsuda, Katsuhiro Morita, Takami Tohyama, Keisuke Tomiyasu, Akihiro Koda, Hirotaka Okabe, Shinichi Itoh, Tetsuya Yokoo, Soshi Ibuka, Makoto Tadokoro, Masaki Itoh, Hajime Sagayama, Reiji Kumai, Youichi Murakami

SCI - Physics

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Abstract

K₃Cu₃AlO₂(SO₄)₄ is a highly one-dimensional spin-1/2 inequilateral diamond-chain antiferromagnet. Spinon continuum and spin-singlet dimer excitations are observed in the inelastic neutron scattering spectra, which is in excellent agreement with a theoretical prediction: A dimer-monomer composite structure, where the dimer is caused by strong antiferromagnetic (AFM) coupling and the monomer forms an almost isolated quantum AFM chain controlling low-energy excitations. Moreover, muon spin rotation/relaxation spectroscopy shows no long-range ordering down to 90 mK, which is roughly three orders of magnitude lower than the exchange interaction of the quantum AFM chain. K₃Cu₃AlO₂(SO₄)₄ is, thus, regarded as a compound that exhibits a Tomonaga-Luttinger spin liquid behavior at low temperatures close to the ground state.

Original language	English
Article number	16785
Journal	Scientific reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-16935-9
Publication status	Published - 2017 Dec 1

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Fujihala, M., Koorikawa, H., Mitsuda, S., Morita, K., Tohyama, T., Tomiyasu, K., Koda, A., Okabe, H., Itoh, S., Yokoo, T., Ibuka, S., Tadokoro, M., Itoh, M., Sagayama, H., Kumai, R., & Murakami, Y. (2017). Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K₃Cu₃AlO₂(SO₄)₄. Scientific reports, 7(1), [16785]. https://doi.org/10.1038/s41598-017-16935-9

Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K₃Cu₃AlO₂(SO₄)₄. / Fujihala, Masayoshi; Koorikawa, Hiroko; Mitsuda, Setsuo; Morita, Katsuhiro; Tohyama, Takami; Tomiyasu, Keisuke; Koda, Akihiro; Okabe, Hirotaka; Itoh, Shinichi; Yokoo, Tetsuya; Ibuka, Soshi; Tadokoro, Makoto; Itoh, Masaki; Sagayama, Hajime; Kumai, Reiji; Murakami, Youichi.

In: Scientific reports, Vol. 7, No. 1, 16785, 01.12.2017.

Research output: Contribution to journal › Article › peer-review

Fujihala, M, Koorikawa, H, Mitsuda, S, Morita, K, Tohyama, T, Tomiyasu, K, Koda, A, Okabe, H, Itoh, S, Yokoo, T, Ibuka, S, Tadokoro, M, Itoh, M, Sagayama, H, Kumai, R & Murakami, Y 2017, 'Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K₃Cu₃AlO₂(SO₄)₄', Scientific reports, vol. 7, no. 1, 16785. https://doi.org/10.1038/s41598-017-16935-9

Fujihala, Masayoshi ; Koorikawa, Hiroko ; Mitsuda, Setsuo ; Morita, Katsuhiro ; Tohyama, Takami ; Tomiyasu, Keisuke ; Koda, Akihiro ; Okabe, Hirotaka ; Itoh, Shinichi ; Yokoo, Tetsuya ; Ibuka, Soshi ; Tadokoro, Makoto ; Itoh, Masaki ; Sagayama, Hajime ; Kumai, Reiji ; Murakami, Youichi. / Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K₃Cu₃AlO₂(SO₄)₄. In: Scientific reports. 2017 ; Vol. 7, No. 1.

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title = "Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K3Cu3AlO2(SO4)4",

abstract = "K3Cu3AlO2(SO4)4 is a highly one-dimensional spin-1/2 inequilateral diamond-chain antiferromagnet. Spinon continuum and spin-singlet dimer excitations are observed in the inelastic neutron scattering spectra, which is in excellent agreement with a theoretical prediction: A dimer-monomer composite structure, where the dimer is caused by strong antiferromagnetic (AFM) coupling and the monomer forms an almost isolated quantum AFM chain controlling low-energy excitations. Moreover, muon spin rotation/relaxation spectroscopy shows no long-range ordering down to 90 mK, which is roughly three orders of magnitude lower than the exchange interaction of the quantum AFM chain. K3Cu3AlO2(SO4)4 is, thus, regarded as a compound that exhibits a Tomonaga-Luttinger spin liquid behavior at low temperatures close to the ground state.",

author = "Masayoshi Fujihala and Hiroko Koorikawa and Setsuo Mitsuda and Katsuhiro Morita and Takami Tohyama and Keisuke Tomiyasu and Akihiro Koda and Hirotaka Okabe and Shinichi Itoh and Tetsuya Yokoo and Soshi Ibuka and Makoto Tadokoro and Masaki Itoh and Hajime Sagayama and Reiji Kumai and Youichi Murakami",

note = "Funding Information: The authors are grateful to S. Takeyama, D. Nakamura, K. Okamoto and T. Goto for helpful discussions. The μSR and INS experiments were performed at the MLF of J-PARC under a user program (Proposal Nos 2015A0314, 2016A0130 and 2015A0225). Synchrotron powder XRD measurements were performed with the approval of the Photon Factory Program Advisory Committee (Proposal Nos 2015P001 and 2016G030). Theoretical study is in part supported by Creation of new functional devices and high-performance materials to support next-generation industries (GCDMSI) to be tackled by using post-K computer and by MEXT HPCI Strategic Programs for Innovative Research (SPIRE) (hp160222, hp170274). This study is partly supported by the Grant-in-Aid for Scientific Research (No. 26287079) and (No. 15H03692) from MEXT, Japan. Publisher Copyright: {\textcopyright} 2017 The Author(s).",

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AU - Fujihala, Masayoshi

AU - Koorikawa, Hiroko

AU - Mitsuda, Setsuo

AU - Morita, Katsuhiro

AU - Tohyama, Takami

AU - Tomiyasu, Keisuke

AU - Koda, Akihiro

AU - Okabe, Hirotaka

AU - Itoh, Shinichi

AU - Yokoo, Tetsuya

AU - Ibuka, Soshi

AU - Tadokoro, Makoto

AU - Itoh, Masaki

AU - Sagayama, Hajime

AU - Kumai, Reiji

AU - Murakami, Youichi

N1 - Funding Information: The authors are grateful to S. Takeyama, D. Nakamura, K. Okamoto and T. Goto for helpful discussions. The μSR and INS experiments were performed at the MLF of J-PARC under a user program (Proposal Nos 2015A0314, 2016A0130 and 2015A0225). Synchrotron powder XRD measurements were performed with the approval of the Photon Factory Program Advisory Committee (Proposal Nos 2015P001 and 2016G030). Theoretical study is in part supported by Creation of new functional devices and high-performance materials to support next-generation industries (GCDMSI) to be tackled by using post-K computer and by MEXT HPCI Strategic Programs for Innovative Research (SPIRE) (hp160222, hp170274). This study is partly supported by the Grant-in-Aid for Scientific Research (No. 26287079) and (No. 15H03692) from MEXT, Japan. Publisher Copyright: © 2017 The Author(s).

PY - 2017/12/1

Y1 - 2017/12/1

N2 - K3Cu3AlO2(SO4)4 is a highly one-dimensional spin-1/2 inequilateral diamond-chain antiferromagnet. Spinon continuum and spin-singlet dimer excitations are observed in the inelastic neutron scattering spectra, which is in excellent agreement with a theoretical prediction: A dimer-monomer composite structure, where the dimer is caused by strong antiferromagnetic (AFM) coupling and the monomer forms an almost isolated quantum AFM chain controlling low-energy excitations. Moreover, muon spin rotation/relaxation spectroscopy shows no long-range ordering down to 90 mK, which is roughly three orders of magnitude lower than the exchange interaction of the quantum AFM chain. K3Cu3AlO2(SO4)4 is, thus, regarded as a compound that exhibits a Tomonaga-Luttinger spin liquid behavior at low temperatures close to the ground state.

AB - K3Cu3AlO2(SO4)4 is a highly one-dimensional spin-1/2 inequilateral diamond-chain antiferromagnet. Spinon continuum and spin-singlet dimer excitations are observed in the inelastic neutron scattering spectra, which is in excellent agreement with a theoretical prediction: A dimer-monomer composite structure, where the dimer is caused by strong antiferromagnetic (AFM) coupling and the monomer forms an almost isolated quantum AFM chain controlling low-energy excitations. Moreover, muon spin rotation/relaxation spectroscopy shows no long-range ordering down to 90 mK, which is roughly three orders of magnitude lower than the exchange interaction of the quantum AFM chain. K3Cu3AlO2(SO4)4 is, thus, regarded as a compound that exhibits a Tomonaga-Luttinger spin liquid behavior at low temperatures close to the ground state.

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ER -

Possible Tomonaga-Luttinger spin liquid state in the spin-1/2 inequilateral diamond-chain compound K₃Cu₃AlO₂(SO₄)₄

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