Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder

H. Ueda; S. Onoda; Y. Yamaguchi; T. Kimura; D. Yoshizawa; T. Morioka; M. Hagiwara; M. Hagihala; M. Soda; T. Masuda; T. Sakakibara; K. Tomiyasu; S. Ohira-Kawamura; K. Nakajima; R. Kajimoto; M. Nakamura; Y. Inamura; N. Reynolds; M. Frontzek; J. S. White; M. Hase; Y. Yasui

doi:10.1103/PhysRevB.101.140408

Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder

H. Ueda, S. Onoda, Y. Yamaguchi, T. Kimura, D. Yoshizawa, T. Morioka, M. Hagiwara, M. Hagihala, M. Soda, T. Masuda, T. Sakakibara, K. Tomiyasu, S. Ohira-Kawamura, K. Nakajima, R. Kajimoto, M. Nakamura, Y. Inamura, N. Reynolds, M. Frontzek, J. S. WhiteM. Hase, Y. Yasui

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Abstract

We report experimental and theoretical evidence that Rb2Cu2Mo3O12 has a nonmagnetic tetramer ground state of a two-leg ladder comprising antiferromagnetically coupled frustrated spin-12 chains and exhibits a Haldane spin gap of emergent spin-1 pairs. Three spin excitations split from the spin-1 triplet by a Dzyaloshinskii-Moriya interaction are identified in inelastic neutron-scattering and electron spin resonance spectra. A tiny magnetic field generates ferroelectricity without closing the spin gap, indicating a unique class of ferroelectricity induced by a vector spin chirality order.

Original language	English
Article number	140408
Journal	Physical Review B
Volume	101
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.101.140408
State	Published - Apr 1 2020

Funding

The authors acknowledge I. Terasaki for his support of the work and helpful discussion and K. Kaneko for preliminary neutron scattering experiments on the triple-axis spectrometer LTAS installed at the JRR-3 reactor, Japan. Numerical calculations were partially performed by using the RIKEN Integrated Cluster of Clusters and the RIKEN HOKUSAI supercomputers. The time-of-flight neutron-scattering experiments were performed using the chopper spectrometers AMATERAS and 4SEASONS at J-PARC (Proposals No. 2012P0202 and No. 2009A0093). The work was partially supported by Grants-in-Aid for Scientific Research (Grants 24244059, 24740253, 25220803, 25246006, 25800221, 16K05426, 17001001, 17H06137, and 17K14359) from the Japan Society for the promotion of Science, by the RIKEN iTHES project, by the FRIS Program for the creation of interdisciplinary research at Tohoku University, and by Swiss National Science Foundation via the SNSF project, Grant No. 200021_153451. The neutron-diffraction experiments were performed at the Swiss spallation neutron source SINQ, Paul Scherrer Institute, Villigen, Switzerland. H.U. is grateful to S. Yunoki for his support.

Funders	Funder number
Japan Society for the Promotion of Science	17K14359
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	200021_153451
Tohoku University

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Ueda, H., Onoda, S., Yamaguchi, Y., Kimura, T., Yoshizawa, D., Morioka, T., Hagiwara, M., Hagihala, M., Soda, M., Masuda, T., Sakakibara, T., Tomiyasu, K., Ohira-Kawamura, S., Nakajima, K., Kajimoto, R., Nakamura, M., Inamura, Y., Reynolds, N., Frontzek, M., ... Yasui, Y. (2020). Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder. Physical Review B, 101(14), Article 140408. https://doi.org/10.1103/PhysRevB.101.140408

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title = "Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder",

abstract = "We report experimental and theoretical evidence that Rb2Cu2Mo3O12 has a nonmagnetic tetramer ground state of a two-leg ladder comprising antiferromagnetically coupled frustrated spin-12 chains and exhibits a Haldane spin gap of emergent spin-1 pairs. Three spin excitations split from the spin-1 triplet by a Dzyaloshinskii-Moriya interaction are identified in inelastic neutron-scattering and electron spin resonance spectra. A tiny magnetic field generates ferroelectricity without closing the spin gap, indicating a unique class of ferroelectricity induced by a vector spin chirality order.",

author = "H. Ueda and S. Onoda and Y. Yamaguchi and T. Kimura and D. Yoshizawa and T. Morioka and M. Hagiwara and M. Hagihala and M. Soda and T. Masuda and T. Sakakibara and K. Tomiyasu and S. Ohira-Kawamura and K. Nakajima and R. Kajimoto and M. Nakamura and Y. Inamura and N. Reynolds and M. Frontzek and White, {J. S.} and M. Hase and Y. Yasui",

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Ueda, H, Onoda, S, Yamaguchi, Y, Kimura, T, Yoshizawa, D, Morioka, T, Hagiwara, M, Hagihala, M, Soda, M, Masuda, T, Sakakibara, T, Tomiyasu, K, Ohira-Kawamura, S, Nakajima, K, Kajimoto, R, Nakamura, M, Inamura, Y, Reynolds, N, Frontzek, M, White, JS, Hase, M & Yasui, Y 2020, 'Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder', Physical Review B, vol. 101, no. 14, 140408. https://doi.org/10.1103/PhysRevB.101.140408

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T1 - Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder

AU - Ueda, H.

AU - Onoda, S.

AU - Yamaguchi, Y.

AU - Kimura, T.

AU - Yoshizawa, D.

AU - Morioka, T.

AU - Hagiwara, M.

AU - Hagihala, M.

AU - Soda, M.

AU - Masuda, T.

AU - Sakakibara, T.

AU - Tomiyasu, K.

AU - Ohira-Kawamura, S.

AU - Nakajima, K.

AU - Kajimoto, R.

AU - Nakamura, M.

AU - Inamura, Y.

AU - Reynolds, N.

AU - Frontzek, M.

AU - White, J. S.

AU - Hase, M.

AU - Yasui, Y.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - We report experimental and theoretical evidence that Rb2Cu2Mo3O12 has a nonmagnetic tetramer ground state of a two-leg ladder comprising antiferromagnetically coupled frustrated spin-12 chains and exhibits a Haldane spin gap of emergent spin-1 pairs. Three spin excitations split from the spin-1 triplet by a Dzyaloshinskii-Moriya interaction are identified in inelastic neutron-scattering and electron spin resonance spectra. A tiny magnetic field generates ferroelectricity without closing the spin gap, indicating a unique class of ferroelectricity induced by a vector spin chirality order.

AB - We report experimental and theoretical evidence that Rb2Cu2Mo3O12 has a nonmagnetic tetramer ground state of a two-leg ladder comprising antiferromagnetically coupled frustrated spin-12 chains and exhibits a Haldane spin gap of emergent spin-1 pairs. Three spin excitations split from the spin-1 triplet by a Dzyaloshinskii-Moriya interaction are identified in inelastic neutron-scattering and electron spin resonance spectra. A tiny magnetic field generates ferroelectricity without closing the spin gap, indicating a unique class of ferroelectricity induced by a vector spin chirality order.

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VL - 101

JO - Physical Review B

JF - Physical Review B

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ER -

Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-12 ladder

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