PGI-1 Talk: Dr. Thi Phuong Thao Nguyen
Quantum Theory of Materials Seminar / *Zwei eingeladene Vorträge*
Magnetic Stability in Monolayer Transition-Metal Dihalides
2D magnets have recently received increasing attention, not only in intrinsic ferromagnetic (FM) materials such as VI3, and CrI3 [1,2] but also in antiferromagnetic (AFM) materials [3]. In 2D systems, triangular lattice typically causes magnetic frustration and often results in non-collinear magnetic orderings such as 120˚ AFM configuration. Recently, we have investigated the magnetism in a series of monolayer MCl2 (M=V, Mn, and Ni) [4].The resulting magnetic stability manifests a distinct chemical trend; VCl2 and MnCl2 show the 120˚ AFM ground states, and NiCl2 shows the FM ground state. The microscopic mechanism behind the magnetic interaction is explained using the exchange coupling constants and the hopping integrals via the Wannier-function scheme. We also referred to the Goodenough-Kanamori-Anderson rules to explain the trend of magnetic interaction.
References
[1] T. P. T. Nguyen, K. Yamauchi, T. Oguchi, D. Amoroso, and S. Picozzi, Phys. Rev. B 104, 014414 (2021).
[2] A. De Vita, T. P. T. Nguyen, et al., Nano Lett. 22, 7034 (2022).
[4] K. Riedl, D. Amoroso, S. Backes, A. Razpopov, T. P. T. Nguyen, K. Yamauchi, P. Barone, S. M. Winter, S. Picozzi, and R. Valentí, Phys. Rev. B 106, 035156 (2022).
[5] T. P. T. Nguyen, and K. Yamauchi, J. Phys. Soc. Jpn. 93, 034710 (2024).
*Zwei eingeladene Vorträge* : Dr. Thi Phuong Thao Nguyen und Prof. Dr. Kunihiko Yamauchi werden jeweils einen 25-minütigen Vortrag mit anschließender Diskussion halten.
Contact
Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Email: s.bluegel@fz-juelich.de
Dr. Thi Phuong Thao Nguyen
SANKEN, Osaka University, Japan
Email: thaonguyen@sanken.osaka-u.ac.jp