Orbital Ordering Transition in La 4 Ru 2 O 10

Autor:	Rongying Jin, Robert J. Cava, David Mandrus, Yang Liu, Raymond Osborn, Qingzhen Huang, Peter G. Khalifah, H. W. Zandbergen
Rok vydání:	2002
Předmět:	Superconductivity Quantum phase transition Multidisciplinary Condensed matter physics Chemical bond Non-bonding orbital Chemistry Electronic structure Neutron scattering Spin (physics) Metamagnetism
Zdroj:	Science. 297:2237-2240
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.1075556
Popis:	We report experimental evidence for a full orbital ordering transition in the two-dimensional lanthanum ruthenate La 4 Ru 2 O 10 . The observable consequences of this orbital ordering include the loss of the Ru local moment, a structural distortion which partitions Ru-O bonds into axially oriented short and long sets, a sharp jump in electrical resistivity, and the opening of a spin gap that is visible in neutron scattering experiments. This is a rare example of a discrete orbital ordering transition in a 4 d transition metal oxide and demonstrates that orbital effects can have an influence on the properties of layered ruthenates, a family of compounds that notably includes the p -wave superconductor Sr 2 RuO 4 and the field-tuned quantum critical metamagnet Sr 3 Ru 2 O 7 .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c30384c277978f45b73a35fd1d436360 https://doi.org/10.1126/science.1075556 Zobrazit plný text záznamu