Orbital polaron lattice formation in lightly doped La1-xSrxMnO3

Abstract

By resonant x-ray scattering at the Mn K-edge on La7/8Sr1/8MnO3, we show that an orbital polaron lattice (OPL) develops at the metal-insulator transition of this compound. This orbital reordering explains consistently the unexpected coexistence of ferromagnetic and insulating properties at low temperatures, the quadrupling of the lattice structure parallel to the MnO2-planes, and the observed polarization and azimuthal dependencies. The OPL is a clear manifestation of strong orbital-hole interactions, which play a crucial role for the colossal magnetoresistance effect and the doped manganites in general.

References in corpus (7)

• Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in $L{a}_{1-x}{A}_{x}Mn{O}_3$
• Transition between two ferromagnetic states driven by orbital ordering in La_{0.88}Sr_{0.12}MnO_3
• Electronic origin of magnetic and orbital ordering in insulating LaMnO_3
• X-ray Resonant Scattering Studies of Orbital and Charge Ordering in Pr${}_{1-x}$Ca${}_x$MnO${}_3$
• Orbital Polarons in the Metal-Insulator Transition of Manganites
• Charge and orbital ordering in underdoped La1-xSrxMnO3
• Vertical Boundary at x ~ 0.11 in the Structural Phase Diagram of the La1-xSrxMnO3 System (0.08 <= x <= 0.125)

Cited by in corpus (11)

• Spin-Orbital Order Modified by Orbital Dilution in Transition Metal Oxides: From Spin Defects to Frustrated Spins Polarizing Host Orbitals
• Direct observation of oxygen superstructures in manganites
• Changeover from Glassy ferromagnetism of the orbital domain state to long range ferromagnetic ordering in La{_{0.9}}Sr_{0.1}MnO{_3}
• Fingerprints of spin-orbital polarons and of their disorder in the photoemission spectra of doped Mott insulators with orbital degeneracy
• Pressure-induced melting of the orbital polaron lattice in La1-xSrxMnO3
• Quantized spin waves in the metallic state of magnetoresistive manganites
• Observation of Colossal Terahertz Magnetoresistance and Magnetocapacitance in a Perovskite Manganite
• Tuning Crystal Field Potential by Orbital Dilution in $d^4$ Oxides
• Orbital Rotations induced by Charges of Polarons and Defects in Doped Vanadates
• Quasi-two-dimensional magnetism and antiferromagnetic ground state in Li${}_2$FeSiO${}_4$
• Octahedral tilts and electronic correlations in La_7/8Sr_1/8MnO_3