Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session F18: Quantum Wires and 1-Dimensional Nanostructures: Transport and Electronic Properties
11:15 AM–2:03 PM,
Tuesday, March 6, 2018
LACC Room: 306B
Sponsoring Units: DCMP DMP
Chair: Joseph Hagmann, NIST -Natl Inst of Stds & Tech
Abstract: F18.00010 : Width Dependent Transport Properties of Manganite Nanostrips*
1:03 PM–1:15 PM
Manganites are known to have pronounced electronic phase separation (EPS) phenomena that dominate their physical properties. Under spatial confinement, the role of EPS may become different. In this work, we fabricate series of nanostrips with different widths from a single La5/12Pr5/24Ca3/8MnO3 thin film grown on LaAlO3 (001) substrate. The widths of the nanostrips range from 1.5um to 50nm. We measured the transport properties of the nanostrips at different temperatures and external magnetic fields. Interestingly, the resistivity of the strips decreases with decreasing width. The phase competition was observed to occur most dramatically at 700 nm wide nanostrip, which has the highest critical magnetic fields for metal-insulator-transition. The interplay between EPS and the edge effect of the nanostrips plays a critical role for the observed width dependence of the transport behavior.
*National Key Research Program of China (2016YFA0300702).
National Basic Research Program of China (973 Program) Grant 2014CB921104,
National Natural Science Foundation of China Grant 91121002,
Shanghai Municipal Natural Science Foundation Grant 14JC1400500.
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