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Theory of Curie temperature enhancement in electron-doped EuO

Stollenwerk, Tobias and Kroha, Johann (2015) Theory of Curie temperature enhancement in electron-doped EuO. Physical Review B, 92, p. 205119. American Physical Society. ISSN 1098-0121

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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.92.205119

Abstract

We present a comparative, theoretical study of the doping dependence of the critical temperature TC of the ferromagnetic insulator-metal transitions in Gd-doped and O-deficient EuO, respectively. The strong TC enhancement in Eu1−xGdxO is due to Kondo-like spin fluctuations on the Gd sites, which are absent in EuO1−x. Moreover, we find that the TC saturation in Eu1−xGdxO for large x is due to a reduced activation of dopant electrons into the conduction band, in agreement with experiments, rather than antiferromagnetic long-range contributions of the RKKY interaction. The results shed light on possibilities for further increasing TC.

Item URL in elib:https://elib.dlr.de/100547/
Document Type:Article
Title:Theory of Curie temperature enhancement in electron-doped EuO
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stollenwerk, Tobiastobias.stollenwerk (at) dlr.deUNSPECIFIED
Kroha, JohannUniversity of BonnUNSPECIFIED
Date:17 November 2015
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:92
Page Range:p. 205119
Publisher:American Physical Society
ISSN:1098-0121
Status:Published
Keywords:Quantum Many Body Physics Condensed Matter Physics Numerical Methods
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben SISTEC
Location: Köln-Porz
Institutes and Institutions:Institut of Simulation and Software Technology > Distributed Systems and Component Software
Deposited By: Stollenwerk, Tobias
Deposited On:09 Dec 2015 16:18
Last Modified:06 Sep 2019 15:29

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