University of Warwick

Abstract：

Magnetic skyrmions are topological magnetic spin structures originally identified in the B20 class of materials. More recently, skyrmions have been found and investigated in other non-centrosymmetric classes of materials and in centrosymmetric intermetallics. To make headway in experiments to understand the basic physics of these skyrmion materials, high quality single crystals are essential. This has motivated us to embark upon a study of several classes of skyrmion materials and to explore a wide composition range of each of the family of compounds. The materials investigated range from centrosymmetric intermetallics such as Gd₂PdSi₃, GdRu₂Si₂, magnetic layered van der Waals materials such as Fe₃GeTe₂, to a large family of intercalated transition metal dichalcogenides (TMDCs) and other frustrated and topological magnets. In this talk, I will present an overview of the materials characteristics of several of the above materials including the challenges in the synthesis of these materials using a variety of techniques at Warwick. Investigations of the effects of substitution and the resulting structural order/disorder as well as magnetic frustration on the existence of the skyrmion phase in these crystals sheds light on the origin and the tuning of the skyrmion lattices. The study of their important structure–property correlations is vital to the understanding of these materials for possible future device applications.

Brief CV of Prof. Geetha Balakrishnan：

Geetha Balakrishnan is a Professor at the Department of Physics, University of Warwick, UK. She received her Ph.D. in Physics at the Indian Institute of Technology, Madras, in 1982, and become a research associate at the same institute. Since moving to UK in 1986, she has advanced through the roles of research fellow (1986-1998), senior research fellow (1991-2004), principal research fellow (2004-2010) and professor (2010-present) at the Department of Physics, University of Warwick, UK. Her research focuses on condensed matter physics, including superconducting, magnetic, topological and skyrmionic materials; single crystal growth of a wide range of materials using various techniques; neutron scattering and related techniques to probe these materials. She was an Elected Fellow of the Institute of Physics, UK in 2009, and JSPS Professorship in 2018. She has over 480 papers published with an H-index of 48 (ORCID ID: 0000-0002-5890-1149) .

腾讯会议ID：939-568-570

会议密码：0811

主持人：罗会仟 研究员

联系人：傅琦 （82649469）