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报告题目:

Interaction-Driven Metal-Insulator Transition with Charge Fractionalization

报告时间

2022年10月27日(周四)10:00

报告嘉宾:

许轶臣(加州大学圣塔芭芭拉分校)

主办单位:

蔻享学术

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报告人介绍

许轶臣

加州大学圣塔芭芭拉分校

许轶臣,2018年毕业于中国科学技术大学少年班学院。在校期间曾获2016,2017年度国家奖学金及2018年度郭沫若奖学金。现于加州大学圣芭芭拉分校物理专业攻读博士学位,师从许岑珂教授,主要研究方向是强关联凝聚态系统中的临界现象理论。

报告简介

It has been proposed that an extended version of the Hubbard model which potentially hosts rich correlated physics may be well simulated by the transition metal dichalcogenide (TMD) moiré heterostructures. Motivated by recent reports of continuous metal-insulator transition (MIT) at half filling, as well as correlated insulators at various fractional fillings in TMD moiré heterostructures, we propose a theory for the potentially continuous MIT with fractionalized electric charges. The charge fractionalization at the MIT will lead to various experimental observable effects, such as a large resistivity as well as large universal resistivity jump at the continuous MIT.

The talk will also cover previous theories for interaction-driven MIT in Hubbard model and the difference between them and our proposal. Physics in phases near the MIT will also be discussed.

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