Ambipolar gate effect and low temperature magnetoresistance of ultrathin La0.8Ca0.2MnO3 Films

Abstract

Ultrathin La0.8Ca0.2MnO3 films have been measured in a field-effect geometry. The electric field due to the gate produces a large ambipolar decrease in resistance at low temperatures. This is attributed to the development of a pseudogap in the density of states and the couple of localized charge to strain. The gate effect and mangetoresistance are interpreted in a consistent framework. The implications for the low temperature behavior of a manganite film in the two dimensional limit are discussed.

arXiv comment4 pages, 3 figures

References in corpus (12)

• Metallic behavior and related phenomena in two dimensions
• Thickness dependent magnetotransport in ultra-thin manganite films
• Colossal electroresistance and electronic phase separation in mixed-valent manganites
• Atomic-scale images of charge ordering in a mixed-valence manganite
• Martensitic accommodation strain and the metal-insulator transition in manganites
• Fermi Surface Nesting and Nanoscale Fluctuating Charge/Orbital Ordering in Colossal Magnetoresistive Oxides
• The Elusive Bose Metal
• Wigner Glass, Spin-liquids, and the Metal-Insulator Transition
• Coulomb Gap: How a Metal Film Becomes an Insulator
• Pseudogap Formation in Models for Manganites
• Temperature-Dependent Pseudogaps in Colossal Magnetoresistive Oxides
• Nanoscale Phase Coexistence and Percolative Quantum Transport

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• Low-Temperature Glassy Response of Ultrathin Manganite Films to Electric and Magnetic Fields
• Mesoscopic transport in ultrathin films of La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$
• Metastable Resistivity States and Conductivity Fluctuations in Low-doped La${}_{1-x}$Ca${}_x$MnO${}_3$ Manganite Single Crystals
• Novel dynamical effects and glassy response in strongly correlated electronic system
• Large electric field effects on the resistance of La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ microstructures