On the electronic structure of the charge-ordered phase in epitaxial and polycrystalline La1-xCaxMnO3 (x = 0.55, 0.67) perovskite manganites

Abstract

In this work the charge transport properties of charge ordered (CO) La1-xCaxMnO3 (LCMO) (x= 0.55, 0.67) epitaxial thin films and polycrystals are discussed following the recent controversy of localised electron states vs. weakly or de- localised charge density wave (CDW) states in CO manganites. The transport properties were investigated by current vs. voltage, direct current resistivity vs. temperature, local activation energy vs. temperature, magnetoresistance and admittance spectroscopy measurements, which all indicated a localised electronic structure in the single CO phase. Delocalised charge anomalies observed previously may be restricted to phase separated materials.

Physical Review B, to be published

References in corpus (13)

• Charge ordered ferromagnetic phase in La0.5Ca0.5MnO3
• Coexisting charge modulation and ferromagnetism produces long period phases in manganites: new example of electronic soft matter
• Sliding charge density wave in manganites
• Weak charge-lattice coupling requires reinterpretation of stripes of charge order in La1-xCaxMnO3
• Spectroscopic evidence for a charge-density-wave condensate in a charge-ordered manganite: Observation of collective excitation mode in Pr${}_{\text{0.7}}$Ca${}_{\text{0.3}}$MnO${}_{\text{3}}$ by using THz time-domain spectroscopy
• Charge order, metallic behavior and superconductivity in La_{2-x}Ba_xCuO_4 with x=1/8
• Nanometer-sized Regions of Charge Ordering and Charge Melting in La2/3Ca1/3MnO3 Revealed by Electron Micro-diffraction
• Charge Ordering Fluctuation and Optical Pseudogap in La${}_{1-x}$Ca${}_x$MnO${}_3$
• Continuous Charge Modulated Diagonal Phase in Manganites
• Negative hopping magnetoresistance of two-dimensional electron gas in a smooth random potential
• Strain control of superlattice implies weak charge-lattice coupling in La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Non-linear electrical response in a charge/orbital ordered ${\mathrm{Pr}}_{0.63}$Ca${}_{0.37}$MnO${}_3$ crystal : the charge density wave analogy
• High resolution determination of ferromagnetic metallic limit in epitaxial La1-xCaxMnO3 films on NdGaO3

Cited by in corpus (8)

• Nonlinear current-voltage behavior and electrically driven phase transition in charge frustrated LuFe2O4
• Charge density waves enhance the electronic noise of manganites
• Boson peak in overdoped manganites La_{1-x}Ca_{x}MnO_{3}
• Magnetotransport properties of La${}_{1-x}$Ca${}_x$MnO${}_3$ (0.52 $\le x\le$ 0.75): signature of phase coexistence
• Origin of Low-Energy Excitations in Charge-Ordered Manganites
• Current-induced electroresistance in Nd0.5Ca0.5Mn0.95Ni0.05O3
• Absence of charge-density-wave sliding in epitaxial charge-ordered Pr0.48Ca0.52MnO3 films
• Charge density wave breakdown in a heterostructure with electron-phonon coupling