Electron spin resonance in the $S$=1/2 quasi-one-dimensional antiferromagnet with Dzyaloshinskii-Moriya interaction BaCu$\_2$Ge$\_2$O$\_7$

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dc.creatorBertaina, Sylvain
dc.creatorPashchenko, V. A.
dc.creatorStepanov, Anatoli
dc.creatorMasuda, T.
dc.creatorUchinokura, K.
dc.date2005-01-20
dc.date.accessioned2026-07-07T03:03:21Z
dc.date.available2026-07-07T03:03:21Z
dc.descriptionWe have investigated the electron spin resonance (ESR) on single crystals of BaCu$\_2$Ge$\_2$O$\_7$ at temperatures between 300 and 2 K and in a large frequency band, 9.6 -134 GHz, in order to test the predictions of a recent theory, proposed by Oshikawa and Affleck (OA), which describes the ESR in a $S$=1/2 Heisenberg chain with the Dzyaloshinskii-Moriya interaction. We find, in particular, that the ESR linewidth, $ΔH$, displays a rich temperature behavior. As the temperature decreases from $T\_{max}/2\approx $ 170 K to 50 K, $ΔH$ shows a rapid and linear decrease, $ΔH \sim T$. At low temperatures, below 50 K, $ΔH$ acquires a strong dependence on the magnetic field orientation and for $H \| c$ it shows a $(h/T)^2$ behavior which is due to an induced staggered field $h$, according to OA's prediction.
dc.identifierhttps://arxiv.org/abs/cond-mat/0501485
dc.identifierhttp://arxiv.org/abs/cond-mat/0501485
dc.identifierPhysical Review Letters 92 (2004) 057203
dc.identifierdoi:10.1103/PhysRevLett.92.057203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25721
dc.subjectStrongly Correlated Electrons
dc.titleElectron spin resonance in the $S$=1/2 quasi-one-dimensional antiferromagnet with Dzyaloshinskii-Moriya interaction BaCu$\_2$Ge$\_2$O$\_7$
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