Optical detection of the rotation of orbital stripes in a charge-orbital ordered bilayer manganite at half-doping
- Authors
- Lee, Y. S.; Tokunaga, Y.; Arima, T.; Tokura, Y.
- Issue Date
- 1-Apr-2008
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- charge-orbital ordering; rotation of orbital stripe; in-plane optical anisotropy
- Citation
- PHYSICA B-CONDENSED MATTER, v.403, no.5-9, pp.1579 - 1581
- Journal Title
- PHYSICA B-CONDENSED MATTER
- Volume
- 403
- Number
- 5-9
- Start Page
- 1579
- End Page
- 1581
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/16877
- DOI
- 10.1016/j.physb.2007.10.199
- ISSN
- 0921-4526
- Abstract
- The CE magnetic order of charge-orbital ordering pattern in half-doped manganites is characterized by the formation of orbital stripe as well as the checkerboard-type charge ordering. The quasi-one-dimensionality in the orbital arrangement results in the in-plane anisotropy of physical properties, e.g., optical spectra with light polarization along the orbital stripe exhibits the larger energy-gap state than those along the orbital chain. It has been recently reported that the spontaneous rotation of orbital stripe with variation of temperature (T) occurs in a bilayer manganite, Pr(Sr0.1Ca0.9)(2)Mn2O7. To confirm this peculiar behavior, we performed optical measurements of a single domain sample with polarization dependence. While the in-plane optical anisotropy is identified together with the initial formation of the charge-orbital ordering, it is reversed at a lower T, where the orbital stripe is rotated by 90 degrees. (C) 2007 Elsevier B.V. All rights reserved.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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