Skip to Main content Skip to Navigation
Journal articles

Magnetic excitations in the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4

Abstract : We report on high-field electron spin resonance (ESR) studies of magnetic excitations in the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4. Frequency-field diagrams of ESR excitations are measured for different orientations of magnetic fields up to 25 T. We show that the substantial zero-field energy gap, Delta approximate to 9.5 K, observed in the low-temperature excitation spectrum of Cs2CuBr4, (Zvyagin et al. 2014 Phys. Rev. Lett. 112 077206) is present well above TN. Noticeably, the transition into the long-range magnetically ordered phase does not significantly affect the size of the gap, suggesting that even below TN the high-energy spin dynamics in Cs2CuBr4 is determined by short-range-order spin correlations. The experimental data are compared with results of model spin-wave-theory calculations for spin-1/2 triangular-lattice antiferromagnet.
Document type :
Journal articles
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-01253063
Contributor : Marianne Leriche <>
Submitted on : Friday, January 8, 2016 - 3:47:35 PM
Last modification on : Tuesday, September 1, 2020 - 3:24:03 PM

Links full text

Identifiers

Collections

Citation

S A Zvyagin, M Ozerov, D Kamenskyi, J Wosnitza, J Krzystek, et al.. Magnetic excitations in the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4. New Journal of Physics, Institute of Physics: Open Access Journals, 2015, 17 (11), pp.113059. ⟨10.1088/1367-2630/17/11/113059⟩. ⟨cea-01253063⟩

Share

Metrics

Record views

367