Resonant Excitonic State as a new concept for the pseudo-gap formation in cuprate superconductors - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Preprints, Working Papers, ... Year : 2015

Resonant Excitonic State as a new concept for the pseudo-gap formation in cuprate superconductors

Abstract

We propose a mechanism where the under-doped regime of cuprate superconductors is governed by an emergent SU(2) pseudo-spin symmetry connecting the $d$-wave superconducting state to a $d$-wave charge order. The specific SU(2) pairing fluctuations between the $d$-wave SC state and the charge sector lead to the formation of a new state of matter, where local patches of excitons are spontaneously generated and are responsible for the creation of Fermi arcs in the pseudo-gap phase of cuprate superconductors. In momentum space, each exciton patch is formed by a superposition of modulation wave vectors coming from the anti-nodal region. A form factor contrives the wave vectors to prefer the x and y axes, producing a typical checkerboard structure recently observed in the under-doped regime. When the amplitude of the new state vanishes, it becomes critical, and in this region a semiclassical Boltzmann calculation leads to a $T/\ln(T)$ scaling of the resistivity in three dimensions, which describes the strange-metal phase with its long-standing linear-$T$ resistivity anomaly.
Fichier principal
Vignette du fichier
1510.03038v4.pdf (1.14 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

cea-01337194 , version 1 (24-06-2016)

Identifiers

Cite

T. Kloss, X. Montiel, C. Pépin. Resonant Excitonic State as a new concept for the pseudo-gap formation in cuprate superconductors. 2015. ⟨cea-01337194⟩
77 View
47 Download

Altmetric

Share

Gmail Facebook X LinkedIn More