conventional and unconventional criticality in strongly correlated systems
报告人:
许岑科
加州大学圣芭芭拉分校
报告时间:
2011-07-01 11:00
报告地点:
理科楼三楼报告厅（理科楼C-302）
主办单位:
物理系
简介:
报告人简介：Cenke Xu entered into the Academic Talent Program( 基础科学班）in 1999 and received his BSc in physics from Tsinghua University in 2003. He got his PhD in physics from University of California at Berkeley (2007) under Prof. Joel E. Moore . He was a Junior Fellow at Havard University from 2007-2010. He joined Department of physics, University of California at Santa Barbara in 2009 as an assistant professor. He is a recipient of Outstanding Young Research Award and Sloan Research Fellowship. His research interests include strongly correlated condensed matter systems, quantum phase transition and quantum criticality, topological insulator and topological superconductor and frustrated magnets and exotic quantum ground states. (http://www.physics.ucsb.edu/~xucenke/) 报告摘要：We will start with an introduction of critical phenomena, including scaling theory and renormalization group. Then we will discuss examples for both conventional and unconventional critical points in condensed matter systems. As an example of conventional critical point, we will discuss classical phase transitions in iron-pnictides superconductors; for unconventional critical points, we will discuss quantum phase transitions driven by topological defects which carry nontrivial quantum numbers. The theory for unconventional critical points will be applied to the phase diagram of Hubbard model on the honeycomb lattice.
