Anisotropy-induced soliton excitation in magnetized strong-rung spin ladders

We report low temperature electron spin resonance experimental and theoretical studies of an archetype \(S=1/2\) strong-rung spin ladder material (C\(_{5}\)H\(_{12}\)N)\(_{2}\)CuBr\(_{4}\). Unexpected dynamics is detected deep in the Tomonaga-Luttinger spin liquid regime. Close to the point where th...

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Bibliographic Details
Published in:arXiv.org 2020-07
Main Authors: Krasnikova, Yu V, Furuya, S C, Glazkov, V N, K Yu Povarov, Blosser, D, Zheludev, A
Format: Article
Language:English
Subjects:
Anisotropy
Electron paramagnetic resonance
Electron spin
Electrons
Excitation
Ladders
Low temperature
Solitary waves
Spin liquid
Spin resonance
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Summary:We report low temperature electron spin resonance experimental and theoretical studies of an archetype \(S=1/2\) strong-rung spin ladder material (C\(_{5}\)H\(_{12}\)N)\(_{2}\)CuBr\(_{4}\). 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 (C\(_{5}\)H\(_{12}\)N)\(_{2}\)CuBr\(_{4}\) are solitonic excitations caused by Dzyaloshinskii-Moriya interaction presence.
ISSN:2331-8422
DOI:10.48550/arxiv.2006.14899