Reemergent metal-insulator transitions in manganites exposed with spatial confinement.
The metal-insulator transition is characterized as a single peak in the temperature-dependent resistivity measurements; exceptions to this have never been seen in any single crystal material system. We show that by reducing a single crystal manganite thin film to a wire with a width comparable to the mesoscopic phase-separated domains inherent in the material, a second and robust metal-insulator transition peak appears in the resistivity versus temperature measurement. This new observation suggests that spatial confinement is a promising route for the discovery of emergent physical phenomena in complex oxides.
Ward
T Z
TZ
Materials Sciences and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Liang
S
S
Fuchigami
K
K
Yin
L F
LF
Dagotto
E
E
Plummer
E W
EW
Shen
J
J