ESR study of the spin ladder with uniform Dzyaloshinskii-Moriya interaction
Artikel i vetenskaplig tidskrift, 2015

©2015 American Physical Society. Evolution of the ESR absorption in a strong-leg spin ladder magnet (C7H10N)2CuBr4 (abbreviated as DIMPY) is studied from 300 K to 400 mK. Temperature dependence of the ESR relaxation follows a staircase of crossovers between different relaxation regimes. We argue that the main mechanism of ESR line broadening in DIMPY is uniform Dzyaloshinskii-Moriya interaction (|D|=0.31 K) with an effective longitudinal component along an exchange bond of Cu ions within the legs resulting from the low crystal symmetry of DIMPY and nontrivial orbital ordering. The same Dzyaloshinskii-Moriya interaction along with other weaker anisotropic spin-spin interactions results in the lifting of the triplet excitation degeneracy, revealed through the weak splitting of the ESR absorption at low temperatures.


V.N. Glazkov

Russian Academy of Sciences

Moscow Institute of Physics and Technology

M. Fayzullin

Kazan Federal University

Y. Krasnikova

Russian Academy of Sciences

Moscow Institute of Physics and Technology

Grigory Skoblin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

D. Schmidiger

Eidgenössische Technische Hochschule Zürich (ETH)

S. Mühlbauer

Heinz Maier-Leibnitz Zentrum (MLZ)

Eidgenössische Technische Hochschule Zürich (ETH)

A. Zheludev

Eidgenössische Technische Hochschule Zürich (ETH)

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 92 18 184403





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