Universität zu Köln

Engelmayer, Johannes ORCID: 0000-0002-3454-1601, Lin, Xiao, Grams, Christoph P., German, Raphael, Froehlich, Tobias, Hemberger, Joachim, Behnia, Kamran ORCID: 0000-0001-8997-5645 and Lorenz, Thomas ORCID: 0000-0003-4832-5157 (2019). Charge transport in oxygen-deficient EuTiO3: The emerging picture of dilute metallicity in quantum-paraelectric perovskite oxides. Phys. Rev. Mater., 3 (5). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2475-9953

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Abstract

We report on a study of charge transport in EuTiO3-delta single crystals with carrier density tuned across several orders of magnitude. Comparing this system with other quasicubic perovskites, in particular strontium titanate, we draw a comprehensive picture of metal-insulator transition and dilute metallicity in this ABO(3) family. Because of a lower electric permittivity, the metal-insulator transition in EuTiO3-delta occurs at higher carrier densities compared to SrTiO3. At low temperature, a distinct T-2 resistivity is visible. Its prefactor A smoothly decreases with increasing carrier concentration in a similar manner in three different perovskites. Our results draw a comprehensive picture of charge transport in doped quantum paraelectrics.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Engelmayer, Johannes UNSPECIFIED orcid.org/0000-0002-3454-1601 UNSPECIFIED Lin, Xiao UNSPECIFIED UNSPECIFIED UNSPECIFIED Grams, Christoph P. UNSPECIFIED UNSPECIFIED UNSPECIFIED German, Raphael UNSPECIFIED UNSPECIFIED UNSPECIFIED Froehlich, Tobias UNSPECIFIED UNSPECIFIED UNSPECIFIED Hemberger, Joachim UNSPECIFIED UNSPECIFIED UNSPECIFIED Behnia, Kamran UNSPECIFIED orcid.org/0000-0001-8997-5645 UNSPECIFIED Lorenz, Thomas UNSPECIFIED orcid.org/0000-0003-4832-5157 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-148652
DOI:	10.1103/PhysRevMaterials.3.051401
Journal or Publication Title:	Phys. Rev. Mater.
Volume:	3
Number:	5
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2475-9953
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language METAL-NONMETAL TRANSITION; SUPERCONDUCTIVITY; SRTIO3; RESISTIVITY Multiple languages Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14865