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The stability of hole-doped antiferromagnetic state in a two-orbital model

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Title
The stability of hole-doped antiferromagnetic state in a two-orbital model
Author(s)
Dheeraj Kumar Singh; Ara Go; Han-Yong Choi; Yunkyu Bang
Subject
cuprates, ; Hund&apos, ; s coupling, ; spin-wave excitations, ; antiferromagnetic state
Publication Date
2020-06
Journal
NEW JOURNAL OF PHYSICS, v.22, no.6, pp.063048
Publisher
IOP PUBLISHING LTD
Abstract
© 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. We investigate the hole-doped antiferromagnetic state in a two-orbital model of cuprates. The model also includes orbital. Unlike the one-orbital model, we find the antiferromagnetic state stable against the hole doping for the cuprates with orbital splitting between and orbitals being ∼1 eV. This results from the fact that the Hund's coupling enforces the filling of orbital ≈1 indicated by a significant reduction of spectral density at the Fermi level. This, in turn, leads to the suppression of intraband fluctuations detrimental to the antiferromagnetic phase. In this scenario, hole doping involves removal of mainly electrons that are comparatively more localized. One important caveat of our meanfield theoretic result and conclusion is that they are reliable only for a very low hole doping region
URI
https://pr.ibs.re.kr/handle/8788114/7799
DOI
10.1088/1367-2630/ab84b7
ISSN
1367-2630
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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