Anisotropy-Induced Soliton Excitation in Magnetized Strong-Rung Spin Ladders

Yu. V. Krasnikova, S. C. Furuya, V. N. Glazkov, K. Yu. Povarov, D. Blosser, and A. Zheludev
Phys. Rev. Lett. 125, 027204 – Published 9 July 2020
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Abstract

We report low temperature electron spin resonance experimental and theoretical studies of an archetype S=1/2 strong-rung spin ladder material (C5H12N)2CuBr4. Unexpected dynamics is detected deep in the Tomonaga-Luttinger spin liquid regime. Close to the point where the system is half-magnetized (and believed to be equivalent to a gapless easy plane chain in zero field) we observed orientation-dependent spin gap and anomalous g-factor values. Field theoretical analysis demonstrates that the observed low-energy excitation modes in magnetized (C5H12N)2CuBr4 are solitonic excitations caused by Dzyaloshinskii-Moriya interaction presence.

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  • Received 5 February 2020
  • Revised 5 June 2020
  • Accepted 23 June 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.027204

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yu. V. Krasnikova1,2,*, S. C. Furuya3, V. N. Glazkov1,2, K. Yu. Povarov4, D. Blosser4, and A. Zheludev4

  • 1P. L. Kapitza Institute for Physical Problems, RAS, Kosygina 2, 119334 Moscow, Russia
  • 2Laboratory for Condensed Matter Physics, National Research University Higher School of Economics, Myasnitskaya street 20, 101000 Moscow, Russia
  • 3Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
  • 4Laboratory for Solid State Physics, ETH Zürich, 8093 Zürich, Switzerland

  • *krasnikova.mipt@gmail.com

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Issue

Vol. 125, Iss. 2 — 10 July 2020

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