Helical scattering signatures of strain and electronic textures in YbFe2O4 from three-dimensional reciprocal space imaging

Autor:	Hearmon, Alexander J., Prabhakaran, Dharmalingam, Nowell, Harriott, Fabrizi, Federica, Gutmann, Matthias J., Radaelli, Paolo G.
Rok vydání:	2011
Předmět:	Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B 85, 014115 (2012)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.85.014115
Popis:	The insulating ternary oxide YbFe$_2$O$_4$ displays an unusual frustration-driven incommensurate charge-ordering (CO) transition, linked to possible ferroelectricity. Based on high-resolution synchrotron data, we report a detailed structural model showing that the CO phase is an incommensurate charge-density wave and cannot be ferroelectric, since the electrical dipole moments are also incommensurately modulated. The change between continuous and "spotty" helices of scattering at the CO transition is attributed to three-dimensional fluctuations of the direction of the ordering wavevector. Comment: 7 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1101.5600 Zobrazit plný text záznamu View this record from Arxiv