报告题目: |
Quenched Disorder and Vestigial Nematicity in the Pseudo-gap Regime of Cuprates |
报告人: |
Laimei Nie 聂莱莓 |
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Stanford University
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报告时间: |
2014-12-18 16:00 |
报告地点: |
Conference Hall 322, Science Building, Tsinghua University |
主办单位: |
高等研究院 |
简介: |
The pseudo-gap regime of high-Tc cuprates phase diagram exhibits a variety of mysterious
behaviors. In the last few years, evidence from NMR/NQR, STM, and X-ray scattering
experiments has shown a general tendency of short-range incommensurate charge-densitywave
(CDW) order “intertwined” with superconductivity (SC). Additionally, transport, STM, and
neutron-scattering have indicated the existence of long-range point-group symmetry breaking
with an electron-nematic character, associated with CDW fluctuations. In this talk I will first
present theoretical analysis of an effective field theory model of classical incommensurate
CDW in the presence of weak quenched disorder. While long-range CDW order is precluded in
such systems, any discrete symmetry breaking (nematic phase in this case) can generally
survive up to a non-zero critical disorder strength. Implications of such “vestigial order” in the
context of cuprates experiments will be discussed. The results of a generalized model
including SC will be introduced as the second part of the talk.
报告人简介：
Laimei Nie received her Bachelor degree in physics from Tsinghua University in 2011, with a
focus on theoretical condensed matter in Prof. Zheng-Yu Weng’s group. From 2011 to present
she is a PhD student in Prof. Steven Kivelson’s group at Stanford University. Her main
research interests include intertwined orders in cuprates and other unconventional
superconductors, renormalization group approach to non-Fermi liquid behaviors, and
applications of DMRG method to strongly correlated systems. |
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