The pseudogap phase of the cuprate superconductors

Event Dates: 

Friday, January 23, 2015 - 10:30am

CTQM Seminar Type: 

  • CTQM Seminar

Seminar Location: 

  • Duane Physics Room G126

Speaker Name(s): 

Subir Sachdev

Speaker Affiliation(s): 

Harvard University

Abstract, Event Details: 

Recent experiments have shed much light on the nature of the ordering in the cuprate superconductors at low temperatures and low doping. I will review evidence that the order parameter in the non-Lanthanum-based cuprates is  a d-form factor density-wave.

This novel order acts as an unexpected window into the electronic structure  of the pseudogap phase at higher temperatures: we argue in favor of a `fractionalized  Fermi liquid' with 4 pockets of spin S=1/2, charge +e fermions enclosing an area  specified by the hole density away from the antiferromagnetic insulator.

 

 

Research Category: