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Updated: Aug 16, 2026
08:45
Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Stripes induced by orbital ordering in layered manganites
T Hotta1, A Feiguin, E Dagotto
1Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan.
Physical Review Letters
|June 1, 2001
Summary
Researchers explored spin-charge-orbital order in manganites using a double-exchange model. They discovered novel diagonal stripes driven by orbital ordering, similar to cuprates, and a new nonmagnetic phase with charge stripes.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- Doped layered manganites exhibit complex spin-charge-orbital ordered structures.
- Jahn-Teller distortions significantly influence these electronic properties.
- Understanding these interactions is key to developing novel electronic materials.
Purpose of the Study:
- To investigate spin-charge-orbital ordered structures in doped layered manganites.
- To elucidate the role of orbital degree of freedom and Jahn-Teller distortions.
- To identify novel phases and their underlying mechanisms.
Main Methods:
- Utilized an orbital-degenerate double-exchange model.
- Incorporated tight coupling to Jahn-Teller distortions.
- Analyzed magnetic and charge ordering phenomena.
Main Results:
- Observed unexpected diagonal stripes in the ferromagnetic phase (x = 1/m, m = integer).
- Identified orbital degree of freedom as the driver for these stripes, with a staggered pattern and pi shift.
- Discovered a new nonmagnetic phase with diagonal static charge stripes at x = 1/4 and 1/3.
Conclusions:
- The orbital degree of freedom plays a crucial role in forming stripe structures in manganites.
- The observed orbital order shift is analogous to spin order shifts in cuprates.
- New nonmagnetic phases with charge stripes emerge under specific doping and coupling conditions.
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