PCMW2D and 2D Raman correlation spectroscopy evidence for presence of spin-phonon coupling in hexagonal LuMnO3
- 주제(키워드) Hexagonal LuMnO<sub>3</sub> , Perturbation-correlation moving window two-dimensional correlation spectroscopy , Raman scattering , Spin phonon coupling , Two-dimension correlation spectroscopy
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier B.V.
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000209700
- 본문언어 영어
- Published As https://doi.org/10.1016/j.saa.2023.122753
- PubMed 37119613
초록/요약
Two-dimensional correlation spectroscopy (2D-COS) and perturbation-correlation moving window two-dimensional correlation spectroscopy (PCMW2D) analysis are performed on the temperature-dependent Raman spectra of hexagonal LuMnO3 single crystal. Under the resonance with the on-site Mn d-d transitions, the correlation between the phonons which are relate to the vibration of Mn ions’ bonds and spin-excitation peaks suggest a strong spin-phonon coupling in LuMnO3. The PCMW2D results clearly show that the significant change in phonons and spin-excitation peaks occurs around the Néel temperature and the spin reorientation transition. The multiple components in the broad spin-excitation peaks also suggest variations in spin symmetries in the ground state. Furthermore, we propose that the 2D-COS and PCMW2D Raman correlation spectroscopies provide a simple and powerful method for investigating the couplings and the transitions, which would be very important for understanding systematically the magnetoelectric properties of multiferroic materials. © 2023 Elsevier B.V.
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