毎月、若手研究者が英語を用いて自身の研究を発信・議論するための支援的な場を提供するとともに、国内外の研究者との交流を通じて専門的なネットワークを構築することを目的とした、「アーリーキャリア・セミナー」を開催しております。
第二回目セミナーのご案内をいたします。
講 師:Dr. Chris Lygouras
所 属:Princeton Materials Institute (PMI), Princeton University
題 目:Topological fermions and collective behavior probed by neutron scattering
日 時:2026年 2月 13日(金) ハイブリッド形式
・セミナー:11:00~12:00
・懇談会:10:30~11:00
*対面参加者の方は、セミナー前に懇談会を開催いたします。
お茶をご用意しておりますのでぜひご参加ください。
場 所:理学部1号館512号室
Zoom:https://us02web.zoom.us/j/84694412845?pwd=UaaUKV6O6RzSJsXifb1PTXs73cqygf.1
Meeting ID: 846 9441 2845
Passcode: 775239
Abstract:
Drawing on the unique connection between electronic and spin degrees of freedom in the solid state is critical for revolutionizing spin electronics. Two notable classes of materials have come to the fore in this pursuit: altermagnets, whose electronic bands are spin-split due to the symmetry of the magnetic structure, even when the net magnetization is zero; and magnetic Weyl semimetals, whose magnetic order can generate and influence electronic band degeneracies. In this seminar, I discuss the profound influence of magnetism on electronic properties in these systems as uncovered by neutron scattering. First, I explore the stability of antiferromagnetic order in a Weyl altermagnet and investigate the subtle role of crystal stacking on spin-spin interactions. Second, I quantify the exchange interactions of a Weyl semimetal whose magnetic wavevector connects Weyl nodes in momentum space. We find signatures of itinerant Weyl electrons coupling to local moments, and reveal low-symmetry interactions that promote spin canting. These investigations highlight the use of neutron scattering as a probe of quantum magnets with exceptional electronic anomalies, and the importance of material development in the pursuit of next generation electronics.

