俄罗斯科学院院士Sergey V. Streltsov教授讲学通知

俄罗斯科学院院士Sergey V. Streltsov教授讲学通知

应金沙隋郁教授邀请，俄罗斯科学院金属物理研究所Sergey V. Streltsov教授于近日来金沙访问，将于本周四下午举行自旋轨道耦合材料方面的讲学活动，欢迎校内广大师生参加。

题目：Tunable Single-Atomic Charge/Spin States of Intercalant Co Ions in a Transition Metal Dichalcogenide

时间：2023年10月19日(周四)，14:00

地点：理学楼202室

报告摘要

Control of a single ionic charge state by altering the number of bound electrons has been considered as an ultimate testbed for atomic charge-induced interactions and manipulations, and such subject has been studied in artificially deposited objects on thin insulating layers. We demonstrate that an entire layer of controllable atomic charges on a periodic lattice can be obtained by cleaving metallic Co_1/3NbS₂, an intercalated transition metal dichalcogenide. We identified a metastable charge state of Co with a different valence and manipulated atomic charges to form a linear chain of the metastable charge state. Density functional theory investigation reveals that the charge state is stable due to a modified crystal field at the surface despite the coupling between NbS₂ and Co via a1g orbitals. The idea can be generalized to other combinations of intercalants and base matrices, suggesting that they can be a new platform to explore single-atom-operational 2D electronics/spintronics.

报告人简介

Sergey V. Streltsov教授2005年在乌拉尔国立技术大学获得物理学副博士学位，2014年获得俄罗斯科学院理学博士学位，现任俄罗斯科学院金属物理研究所低维自旋系统实验室主任。Streltsov教授是国际上凝聚态物理理论研究方面的著名专家，在轨道物理第一性原理计算方面取得了突出的成果，在包括 Nature Materials、PNAS、PRL、PRX、Physics-Uspekhi等国际物理学顶级期刊发表高水平学术论文百余篇，2019年被评为俄罗斯科学院通讯院士。