Direct imaging of lattice-strain-induced stripe phases in an optimally doped manganite film
Abstract
In a La0.75Ca0.25MnO3/MgO film without quenched disorder, we show insulating and metallic stripes above and below the Curie temperature (TC) , respectively, by a high-resolution scanning tunneling microscopy (STM) and/or spectroscopy measurement. Formation of these stripes involves competing charge, orbital, and lattice orders and is an outcome of an overlapping of electron wave functions mediated by the lattice strain. The presence of the quadrupolar contribution in the second-harmonic generation experiments supports the strain mediated charge-orbital stripes observed by STM.
- Publication:
-
Physical Review B
- Pub Date:
- May 2007
- DOI:
- arXiv:
- arXiv:cond-mat/0605712
- Bibcode:
- 2007PhRvB..75q2407S
- Keywords:
-
- 75.47.Lx;
- 68.37.Ef;
- 71.30.+h;
- 71.38.-k;
- Manganites;
- Scanning tunneling microscopy;
- Metal-insulator transitions and other electronic transitions;
- Polarons and electron-phonon interactions;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science