Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-&lt;sup&gt;1&lt;/sup&gt;/&lt;sub&gt;2&lt;/sub&gt; ladder

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, J.S.; Hase, M.; Yasui, Y.

doi:10.1103/PhysRevB.101.140408

Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-¹/₂ ladder

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

Citation

Ueda, H., Onoda, S., Yamaguchi, Y., Kimura, T., Yoshizawa, D., Morioka, T., … Yasui, Y. (2020). Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-¹/₂ ladder. Physical Review B, 101, 140408(R) (6 pp.). https://doi.org/10.1103/PhysRevB.101.140408

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:31535

We report experimental and theoretical evidence that Rb₂Cu₂Mo₃O₁₂ has a nonmagnetic tetramer ground state of a two-leg ladder comprising antiferromagnetically coupled frustrated spin-¹/₂ 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.

Details

Publication Type

Journal Article

Title

Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin-¹/₂ ladder

Author(s)

Ueda, H.

Onoda, S.

Yamaguchi, Y.

Kimura, T.

Yoshizawa, D.

Morioka, T.