Author(s): Wu, JB (Wu, Jiangbin); Yao, Y (Yao, Yu); Lin, ML (Lin, Miao-Ling); Rosner, M (Rosner, Malte); Du, ZH (Du, Zhonghao); Watanabe, K (Watanabe, Kenji); Taniguchi, T (Taniguchi, Takashi); Tan, PH (Tan, Ping-Heng); Haas, S (Haas, Stephan); Wang, H (Wang, Han)

Source: ADVANCED MATERIALS Article Number: 2108506 DOI: 10.1002/adma.202108506 Early Access Date: APR 2022

Abstract: Novel 2D magnets exhibit intrinsic electrically tunable magnetism down to the monolayer limit, which has significant value for nonvolatile memory and emerging computing device applications. In these compounds, spin-phonon coupling (SPC) typically plays a crucial role in magnetic fluctuations, magnon dissipation, and ultimately establishing long-range ferromagnetic order. However, a systematic understanding of SPC in 2D magnets that combines theory and experiment is still lacking. In this work, monolayer chromium tribromide is studied to investigate SPC in 2D magnets via Raman spectroscopy and first principle calculations. The experimental Curie temperature and phonon shifts are found to be in good agreement with the numerical simulations. Specifically, it is demonstrated how magnetic exchange interactions affect phonon vibrations, which helps establish design fundamentals for 2D magnetic materials and other related devices.

Accession Number: WOS:000783462500001

PubMed ID: 35285556

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Wu, Jiangbin                  0000-0002-8751-7082

ISSN: 0935-9648

eISSN: 1521-4095

Full Text: https://onlinelibrary.wiley.com/doi/10.1002/adma.202108506