Charge-order in the underdoped cuprates: a window into the normal state

Date

Jul 9, 2015

Time

3:00 PM - 4:00 PM

Speaker

Debanjan Chowdhury

Affiliation

Harvard

Language

en

Main Topic

Physik

Other Topics

Physik

Host

CMT seminars

Description

Recent experiments in the underdoped regime of the hole-doped cuprates have found evidence for an incommensurate charge density wave state. I'll present an analysis of the charge ordering instabilities in a metal with antiferromagnetic correlations, where the electronic excitations are coupled to the fractionalized excitations of a quantum fluctuating antiferromagnet on the square lattice. The resulting charge density wave state emerging out of such a fractionalized Fermi-liquid (FL*) is remarkably similar to the one observed in experiments on a number of different families of the cuprates. Our results show that the observed charge density wave appears as a low-energy instability of a "fractionalized" metallic state linked to the proximity to an antiferromagnetic insulator, and the pseudogap regime can be described by such a metal at least over intermediate length and energy scales. I'll discuss various theoretical approaches towards describing such a fractionalized metallic state in one-band models.

Last modified: Jul 9, 2015, 9:50:25 AM