主讲人：苏跃华教授（烟台大学）

题目：Proposals for coincidence detection of the two-body correlations of strongly correlated electron systems

时 间：2021/3/19周五15:00

地点：理工楼1201报告厅

联系人：赵继泽

报告摘要：

The strongly correlated electron systems, such as the different families of unconventional superconductors and the various quantum magnets, show various novel physical properties which stem from the intrinsic many-body correlations. These intrinsic many-body correlations are beyond the direct detection of the modern experimental probes. Recently, we proposed a coincidence detection theory for direct detection of the intrinsic two-body correlations of the strongly correlated electron systems. There are two basic ideas in our coincidence detection theory as follows: (1) the intrinsic two-body correlations can be directly detected by two-body coincidence detection, and (2) the coincidence detection probability is determined by the second-order perturbation of the interaction between the target material and the external probe field. Based on the coincidence detection theory, we have proposed some coincidence techniques, including a coincidence angle-resolved photoemission spectroscopy (cARPES), a coincidence angle-resolved photoemission and inverse-photoemission spectroscopy (cARP/IPES), a coincidence angle-resolved inverse-photoemission spectroscopy (cARIPES), and a coincidence inelastic neutron scattering (cINS). These coincidence techniques can directly detect the dynamical two-body correlations of the strongly correlated electron systems in particle-particle channel, particle-hole channel or two-spin channel. These coincidence techniques are potential techniques for the study of unconventional superconductivity, electronic nematicity, itinerant magnetism, and novel quantum spin liquids.

[1]. Yuehua Su and Chao Zhang, Coincidence angle-resolved photoemission spectroscopy: Proposal for detection of two-particle correlations,Phys. Rev. B 101, 205110(2020)/arXiv:2002.00605.

[2]. Yuehua Su, Shengyan Wang, and Chao Zhang, Coincidence inelastic neutron scattering for detection of two-spin magnetic correlations,Phys. Rev. B 103, 054431(2021)/arXiv:2009.01680.

个人简介:

苏跃华，1995年毕业于兰州大学物理系，2003年获中国科学院理论物理研究所博士学位，2003年至2005年在清华大学高等研究院从事博士后研究，2005年进入烟台大学光电信息科学技术学院工作至今，现任烟台大学教授。研究方向与研究兴趣主要为强关联电子系统中的非常规物理，包括高温超导电性、非费米液体物理、量子相变与临界涨落等。