주제: Van der Waals magnets: a new platform for 2D magnetism

연사: Je-Guen Park, Seoul National University (Korea)
일시: 4월 17일 오후 5시
장소: 연구협력관 지하 1층 주피터 회의실 및 줌(Zoom) 진행 

개요: Two-dimensional magnetism has played a critical role in the development of modern magnetism, starting from the Heisenberg model proposed in the 1930s. It is not an exaggeration to state that all our modern understanding of matter stands on the theoretical models of Ising, XY, and Heisenberg models, all in two dimensions [1-3]. Despite the massive importance of the three theoretical models, the experimental studies have been slow in coming. There can be several reasons for this unfortunate situation: for example, the lack of adequate experimental tools. However, the primary reason for this lack of experimental studies about true two-dimensional magnetism is the absence of suitable materials. Against this background, the discovery of new two-dimensional magnets in TMPS₃ (TM=Mn, Fe, and Ni) in 2016 has been a major breakthrough [4-8]. A dozen new materials have been since added to this growing list of van der Waals magnets, enabling many new experiments that have never been considered. In this talk, I will explain how the field started and developed before sharing several recent research highlights.

[1] L. Onsager, Phys. Rev. 65, 117 (1944).

[2] J. M. Kosterlitz and D. J. Thouless, J. Phys. C 6, 1181 (1973).

[3] N. D. Mermin and H. Wagner, Phys. Rev. Lett. 17, 1133 (1966).

[4] Je-Geun Park, J. Phys. Condens. Matter 28, 301001 (2016).

[5] Cheng-Tai Kuo et al., Scientific Reports 6, 20904 (2016).

[6] Sungmin Lee et al., APL Materials 4, 086108 (2016).

[7] Jae-Ung Lee et al., Nano Lett. 16, 7433 (2016).

[8] Kenneth S. Burch, David Mandrus, and Je-Geun Park, Nature 563, 47 (2018).

* 사전등록 필수: https://qns.science/colloquium/registration/

* 본 콜로키움은 영어로 진행되며 온라인 및 오프라인 참석이 가능합니다.