【学术视频】超导新前沿国际研讨会 | 清华大学翁征宇教授

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图 | 翁征宇

题   目：The complexity in the cuprate and the underlying organizing principle

报告人：翁征宇

单   位：清华大学

时   间：2019-11-11

地   点：中国科学技术大学

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报告摘要

A sensible phenomenology of the complex phase diagram and rich phenomenon in the high-Tc cuprate calls for a microscopic understanding based on general principles. In this talk, I will identify a set of the most essential organization principles for the doped Mott insulator, which are argued to have captured the fundamental physics of the cuprate superconductor. Then I will exemplify their nature as the exotic long-range entanglement of many-body quantum mechanics by using the exact numerical tools of exact diagonalization and density matrix renormalization group, which are applied to some special cases of finite size/limited geometry to demonstrate the consequences of the general principle. Next, I will focus on the phase diagram relevant to the experiments in the cuprate, and show that it may be unified by a “parent”ground state ansatz constructed based on the organization principles. Here the superconducting state is of non-BCS nature with modified London equation and new elementary excitations. In particular, the two-gap structure and dichotomy between the nodal and antinodal regimes in the superconducting state, the origin of Fermi arc in the pseudogap regime, and the strange metal behavior in the high-temperature regime will be discussed as part of the emergent phenomenon.

个人简介

翁征宇，清华大学高等研究院副院长、杨振宁讲座教授。1982年本科毕业于中国科学技术大学；1987年在中国科大获得博士学位。1987-2001年，在美国德州高温超导中心做博士后、研究助理教授；2001至今，任清华大学高等研究院教授。其研究领域：理论凝聚态物理。

会议简介

The Physical Review Workshops focus on topics that straddle traditional subject boundaries and new ones that are starting to “emerge from the noise”. The present workshop the first to be held far away from Long Island.Collectively, the goal of these workshops is to provide a setting to promote open and informal discussions and the exchange of information needed to help assess the promise and challenges of an emerging field. With this in mind, the workshops comprise only a limited number of presentations and leave considerable room for informal conversations, round-table discussions, and social activities.

主办方：中国科学技术大学

—— ——往期精彩回顾—— ——●【学术视频】超导新前沿国际研讨会 | 东京大学Takeshi Konda博士：Electronic Structure of Multilayered Cuprates Revealed by Laser-ARPES

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