Sitemap   |  Contact  |  Home  |  中文  |  CAS
ABOUT US
 
RESEARCH
 
PEOPLE
 
POSITIONS AVAILABLE
News & Events
  Events
  Upcoming Events
  Location:Home > News & Events > Upcoming Events
Flat-Band Materials
Author:
Update time: 2019-01-21
Close Text Size: A A A Print

Speaker:Prof.LIUfeng,The University of Utah
Time:Tuesday,10:00a.m.,22nd Janurary
Place:Shangshan yuan 201

Abstract:Unlike a localized state induced by defect in a crystalline solid, the so-called flat band is truly a Bloch state but yet without band dispersion. It arises from destructive interference of Bloch wave functions, independent of the single-particle crystalline Hamiltonian (i.e., the strength of lattice hopping). Flat band can host a range of exotic quantum phases, such as ferromagnetism, Wigner crystallization, superconductivity and high-temperature fractional quantum Hall effect. In this talk, He will first briefly review lattice models which give rise to 2D/3D flat bands including a new Coloring-Triangle lattice they found recently. He will then discuss real flat-band materials including their recent work on pyrochlore Sn2Nb2O7 which hosts 3D flat bands. As an interesting physical manifestation of flat bands, a novel mechanism for the formation of Weyl points enabled by doping of doubly degenerated 3D flat bands, instead of symmetry breaking of a Dirac point, will be discussed.

NEWS & EVENTS
 
INTERNATIONAL COOPERATION
 
EDUCATION & TRAINING
 
RESOURCES
Copyright ©2008-2011 Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), CAS
Address: 398 Ruoshui Road, SEID, SIP, Suzhou, 215123, China|Tel:+86512 6287 2509|Fax:+86512 6260 3079|Email: administrator@sinano.ac.cn