Universität zu Köln

Ulbrich, Holger and Braden, Markus ORCID: 0000-0002-9284-6585 (2012). Neutron scattering studies on stripe phases in non-cuprate materials. Physica C, 481. S. 31 - 46. AMSTERDAM: ELSEVIER. ISSN 1873-2143

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Abstract

Several non-cuprates layered transition-metal oxides exhibit clear evidence for stripe ordering of charges and magnetic moments. Therefore, stripe order should be considered as the typical consequence of doping a layered Mott insulator, but only in cuprates stripe order or fluctuating stripes coexist with metallic properties. A linear relationship between the charge concentration and the incommensurate structural and magnetic modulations can be considered as the finger print of stripe ordering with localized degrees of freedom. In nickelates and in cobaltates with K2NiF4 structure, doping suppresses the nearest-neighbor antiferromagnetism and induces stripe order. The higher amount of doping needed to induce stripe phases in these non-cuprates series can be attributed to reduced charge mobility. Also manganites exhibit clear evidence for stripe phases with further enhanced complexity, because orbital degrees of freedom are involved. Orbital ordering is the key element of stripe order in manganites since it is associated with the strongest structural distortion and with the perfectly fulfilled relation between doping and incommensurability. Magnetic excitations in insulating stripe phases exhibit strong similarity with those in the cuprates, but only for sufficiently short magnetic correlation lengths reflecting well-defined magnetic stripes that are only loosely coupled. (C) 2012 Elsevier B. V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ulbrich, Holger UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, Markus UNSPECIFIED orcid.org/0000-0002-9284-6585 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-480763
DOI:	10.1016/j.physc.2012.04.039
Journal or Publication Title:	Physica C
Volume:	481
Page Range:	S. 31 - 46
Date:	2012
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1873-2143
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INCOMMENSURATE MAGNETIC CORRELATIONS; DENSITY-OF-STATES; CHARGE-ORDERED STRIPES; X-RAY-SCATTERING; SPIN DYNAMICS; COPPER-OXIDE; WAVE ANTIFERROMAGNETISM; ELECTRICAL-PROPERTIES; MANGANESE OXIDES; ORBITAL ORDER Multiple languages Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48076