Universität zu Köln

Vojta, M. (2010). Tendencies toward nematic order in YBa2Cu3O6+delta: Uniform distortion vs. incipient charge stripes. Eur. Phys. J.-Spec. Top., 188 (1). S. 49 - 60. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1951-6355

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Abstract

Recent neutron scattering and transport data obtained on underdoped YBa2Cu3O6+delta, with strong signatures of rotation symmetry breaking at low temperatures, point toward electron-nematic order in the charge sector. Such order may originate from a uniform distortion with d-wave symmetry or as a precursor of a uni-directional stripe phase. Here, we discuss whether the neutron scattering data can be linked to incipient charge stripes. We employ and extend a phenomenological model for collective spin and charge fluctuations and analyze the resulting spin excitation spectrum under the influence of lattice anisotropies. Our results show that the experimentally observed temperature-dependent magnetic incommensurability is compatible with a scenario of incipient stripes, the temperature dependence being due to the temperature variation of both strength and correlation length of the charge stripes. Finally, we propose further experiments to distinguish the possible theoretical scenarios.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Vojta, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-495484
DOI:	10.1140/epjst/e2010-01296-9
Journal or Publication Title:	Eur. Phys. J.-Spec. Top.
Volume:	188
Number:	1
Page Range:	S. 49 - 60
Date:	2010
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	1951-6355
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIGH-TEMPERATURE SUPERCONDUCTORS; T-C SUPERCONDUCTOR; COPPER-OXIDE SUPERCONDUCTORS; PSEUDOGAP STATE; PHASES; SYMMETRY; MODEL; SPIN Multiple languages Physics, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49548