Evolution of the nematic susceptibility in LaFe\(_{1-x}\)Co\(_x\)AsO

The identification of electronic nematicity across series of iron-based superconductors raises the question of its relationship with superconductivity and other ordered states. Here, we report a systematic elastoresistivity study on LaFe\(_{1-x}\)Co\(_x\)AsO single crystals, which have well separate...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2020-08
Main Authors: Hong, Xiaochen, Caglieris, Federico, Kappenberger, Rhea, Wurmehl, Sabine, Aswartham, Saicharan, Scaravaggi, Francesco, Lepucki, Piotr, Wolter, Anja U B, Grafe, Hans-Joachim, Büchner, Bernd, Hess, Christian
Format: Article
Language:English
Subjects:
Critical point
Crystal structure
Crystals
Curie temperature
Doping
Magnetic permeability
Magnetic transitions
Nematic crystals
Single crystals
Superconductivity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The identification of electronic nematicity across series of iron-based superconductors raises the question of its relationship with superconductivity and other ordered states. Here, we report a systematic elastoresistivity study on LaFe\(_{1-x}\)Co\(_x\)AsO single crystals, which have well separated structural and magnetic transition lines. All crystals show Curie-Weiss-like nematic susceptibility in the tetragonal phase. The extracted nematic temperature is monotonically suppressed upon cobalt doping, and changes sign around the optimal doping level, indicating a possible nematic quantum critical point beneath the superconducting dome. The amplitude of nematic susceptibility shows a peculiar double-peak feature. This could be explained by a combined effect of different contributions to the nematic susceptibility, which are amplified at separated doping levels of LaFe\(_{1-x}\)Co\(_x\)AsO.
ISSN:2331-8422
DOI:10.48550/arxiv.1908.00484