2015/12/31 by Chong Wang, Daiwei Yu, Xiaoqiang Liu +10 · 10 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Lattice (music) #Magnet #Magnetic and transport properties of perovskites and related materials #Magnetism #Multiferroics and related materials #Optics #Phonon #Physics #Quantum mechanics #Raman scattering #Raman spectroscopy #Spin wave #Spiral (railway) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.96.085111
published in Physical review. B./Physical review. B 96(8) (American Physical Society) · 4 pages, 4 figures; SM available upon request
arxiv created 2017/07/13 · openalex created_date 2017/07/21 · openalex publication_date 2017/08/08 · arxiv updated 2017/08/15 · openalex updated_date 2026/08/05
We present a systematic study of spin and lattice dynamics in the quasi-one-dimensional spiral magnet CuBr2, using Raman scattering in conjunction with infrared and neutron spectroscopy. Along with the development of spin correlations upon cooling, we observe a rich set of broad Raman bands at energies that correspond to phonon-dispersion energies near the one-dimensional magnetic wave vector. The low-energy bands further exhibit a distinct intensity maximum at the spiral magnetic ordering temperature. We attribute these unusual observations to two possible underlying mechanisms: (1) formation of hybrid spin-lattice excitations and/or (2) ``quadrumerization'' of the lattice caused by spin-singlet entanglement in competition with the spiral magnetism.