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[理论室报告] Magnetism and Superconductivity on Depleted Lattices
时间: 2019年01月30日 10:30
地点: M830
报告人: Richard Scalettar

Distinguished Professor, University of California, Davis

http://scalettar.physics.ucdavis.edu

Abstract: Understanding magnetic and pairing order in several interesting classes of materials involves the geometry formed by regular depletion of sites from a square lattice. The CuO$_2$ sheets of cuprate superconductors form a "Lieb" lattice where 1/4 of the sites of a square lattice are absent. Similarly the vanadium atoms of CaV$4$O$9$ and the Ni atoms in La$_4$Ni$_3$O$_8$ involve 1/5 and 1/3 depletion, respectively. In this talk I will describe the band structures which arise in the noninteracting limit and then use Quantum Monte Carlo to understand the effects of strong correlation.

Host: Zi Yang Meng (9331)


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