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Density-wave instabilities of fractionalized Fermi liquids

Cornell Affiliated Author(s)

Author

Debanjan Chowdhury
S. Sachdev

Abstract

Recent experiments in the underdoped regime of the hole-doped cuprates have found evidence for an incommensurate charge density-wave state. We 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∗) has wave vectors of the form (±Q0,0),(0,±Q0), with a predominantly d-form factor, in agreement with experiments on a number of different families of the cuprates. In contrast, as previously shown, the charge density-wave instability of a nearly antiferromagnetic metal with a large Fermi surface, interacting via short-range interactions, has wave vectors of the type (±Q0,±Q0). 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. © 2014 American Physical Society.

Date Published

Journal

Physical Review B - Condensed Matter and Materials Physics

Volume

90

Issue

24

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84919630712&doi=10.1103%2fPhysRevB.90.245136&partnerID=40&md5=7f8a1623f7fc4131d8b6032d018b8369

DOI

10.1103/PhysRevB.90.245136

Group (Lab)

Debanjan Chowdhury Group

Funding Source

DMR-1360789
1360789

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