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Type: Artigo de periódico
Title: Field-dependent collective ESR mode in YbRh2Si2
Author: Holanda, LM
Duque, JGS
Bittar, EM
Adriano, C
Pagliuso, PG
Rettori, C
Hu, RW
Petrovic, C
Maquilon, S
Fisk, Z
Huber, DL
Oseroff, SB
Abstract: Electron spin resonance (ESR) experiments in YbRh2Si2 Kondo lattice (T-K similar or equal to 25 K) at different field/frequencies (4.1 <= v <= 34.4 GHz) and H-perpendicular to c revealed: (i) a strong field dependent Yb3+ spin-lattice relaxation, (ii) a weak field and T-dependent effective g-value, (iii) a suppression of the ESR intensity beyond 15% of Lu-doping, and (iv) a strong sample and Lu-doping (<= 15%) dependence of the ESR data. These results suggest that the ESR signal in YbRh2Si2 may be due to a coupled Yb3+-conduction electron resonant collective mode with a subtle field-dependent spins dynamic. (C) 2009 Elsevier B.V. All rights reserved.
Subject: Heavy fermions
Electron spin resonance (ESR)
Country: Holanda
Editor: Elsevier Science Bv
Citation: Physica B-condensed Matter. Elsevier Science Bv, v. 404, n. 19, n. 2964, n. 2968, 2009.
Rights: fechado
Identifier DOI: 10.1016/j.physb.2009.07.024
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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