Chemical potential shift in La(1-x)Sr(x)MnO(3): Photoemission test of the phase separation scenario

Abstract

We have studied the chemical potential shift in La(1-x)Sr(x)MnO(3) as a function of doped hole concentration by core-level x-ray photoemission. The shift is monotonous, which means that there is no electronic phase separation on a macroscopic scale, whereas it is consistent with the nano-meter scale cluster formation induced by chemical disorder. Comparison of the observed shift with the shift deduced from the electronic specific heat indicates that hole doping in La(1-x)Sr(x)MnO(3) is well described by the rigid-band picture. In particular no mass enhancement toward the metal-insulator boundary was implied by the chemical potential shift, consistent with the electronic specific heat data.

7 pages, 3 figures, to be published in Europhysics Letters

Cited by in corpus (15)

• Nature of Well-Screened State in Hard X-ray Mn 2$p$ Core-Level Photoemission of La${}_{1-x}$Sr${}_x$MnO${}_3$ Films
• Hole-doping-induced changes in the electronic structure of La${}_{1-x}$Sr${}_x$FeO${}_3$ : soft x-ray photoemission and absorption study of epitaxial thin films
• Electron Doping of Cuprates via Interfaces with Manganites
• In situ photoemission study on atomically-controlled La${}_{1-x}$Sr${}_x$MnO${}_3$ thin films: Composition dependence of the electronic structure
• Chemical potential shift and spectral weight transfer in Pr${}_{1-x}$Ca${}_x$MnO${}_3$ revealed by photoemission spectroscopy
• Hidden relationship between the electrical conductivity and the Mn 2p core-level photoemission spectra in La1-xSrxMnO3
• Gradual Disappearance of the Fermi Surface near the Metal-Insulator Transition in La${}_{1-x}$Sr${}_x$MnO${}_3$
• Valence changes associated with the metal-insulator transition in Bi${}_{1-x}$La${}_x$NiO${}_3$
• Empirical relationship between x-ray photoemission spectra and electrical conductivity in a colossal magnetoresistive manganite La_{1-x}Sr_{x}MnO_{3}
• In-situ photoemission study of Pr_{1-x}Ca_xMnO_3 epitaxial thin films with suppressed charge fluctuations
• Spectroscopic studies on the electronic and magnetic states of Co-doped perovskite manganite Pr0.8Ca0.2Mn1-yCoyO3 thin films
• A high resolution, hard x-ray photoemission investigation of La_(2-2x)Sr_(1+2x)Mn_2O_7 (0.30<x<0.50): on microscopic phase separation and the surface electronic structure of a bilayered CMR manganite
• Effect of Sr-doping of LaMnO3 spacer on modulation-doped two-dimensional electron gases at oxide interfaces
• Laboratory hard X-ray photoelectron spectroscopy of La${}_{1-x}$Sr${}_x$MnO${}_3$
• Chemical potential landscape in band filling and bandwidth-control of manganites: Photoemission spectroscopy measurements