Magnetic excitations in the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4
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Contributors
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, 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.
Details
Original language | English |
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Article number | 113059 |
Pages (from-to) | 1-7 |
Number of pages | 7 |
Journal | New journal of physics |
Volume | 17 |
Issue number | 11 |
Publication status | E-pub ahead of print - 27 Nov 2015 |
Peer-reviewed | Yes |
Keywords
ASJC Scopus subject areas
Keywords
- frustration, magnetism, spectroscopy