Zheng-Cheng Gu Seminar

Date/Time
Date(s) - Oct 10 2014
3:30 PM - 4:30 PM

Location
Shasta Room, Bldg. 40, Room 361

Category(ies)


Emergence of p+ip superconductivity in 2D strongly correlated Dirac systems

Zheng-Cheng Gu

Perimeter Institute, Canada

Search for p+ip superconducting(SC) state has become a fascinating subject in condensed matter physics, as a dream application awaits in topological quantum computation. In this talk, I report the theoretical discovery of a p+ip SCĀ ground state (coexisting with ferromagnetic order) in honeycomb lattice Hubbard model with infinite repulsive interaction at low doping(\delta< 0.2), by using both the state-of-art Grassmann tensor product state(GTPS) approach and a quantum field theory approach. Our discovery suggests a new mechanism for p+ip SC state in generic strongly correlated systems and opens a new door towards experimental realization. The p+ip SC state has an instability towards a potential non-Fermi liquid below a large but finite U; however, a small in-plan Zeeman field stabilizes the p+ip SC state. Relevant realistic materials are also proposed.