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

Abstract

Photoemission data taken with hard x-ray radiation on cleaved single crystals of the bilayered, colossal magnetoresistant manganite La_(2-2x)Sr_(1+2x)Mn_2O_7 (LSMO) with 0.30<x<0.50 are presented. Making use of the increased bulk-sensitivity upon hard x-ray excitation it is shown that the core level footprint of the electronic structure of the LSMO cleavage surface is identical to that of the bulk. Furthermore, by comparing the core level shift of the different elements as a function of doping level x, it is shown that microscopic phase separation is unlikely to occur for this particular manganite well above the Curie temperature.

7 pages, 5 figures

References in corpus (8)

• Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites
• Polarons and confinement of electronic motion to two dimensions in a layered transition metal oxide
• Polaron Coherence Condensation as the Mechanism for Colossal Magnetoresistance in Layered Manganites
• Quasiparticle-like peaks, kinks, and electron-phonon coupling at the ($\pi$,0) regions in the CMR oxide La${}_{2-2x}$Sr${}_{1+2x}$Mn${}_2$O${}_7$
• A local metallic state in globally insulating $L{a}_{1.24}S{r}_{1.76}M{n}_2{O}_7$ well above the metal-insulator transition
• Chemical potential shift and spectral weight transfer in Pr${}_{1-x}$Ca${}_x$MnO${}_3$ revealed by photoemission spectroscopy
• Non-gapped Fermi surfaces, quasiparticles and the anomalous temperature dependence of the near-$E_F$ electronic states in the CMR oxide La${}_{2-2x}$Sr${}_{1+2x}$Mn${}_2$O${}_7$ with $x=0.36$
• Polaronic state and nanometer-scale phase separation in colossal magnetoresistive manganites

Cited by in corpus (5)

• Hard x-ray photoemission and density functional theory study of the internal electric field in SrTiO3/LaAlO3 oxide heterostructures
• Bilayer manganites: polarons in the midst of a metallic breakdown
• Spin dynamics and unconventional magnetism in insulating La${}_{(1-2x)}$Sr${}_{2x}$Co${}_{(1-x)}$Nb${}_x$O${}_3$
• Laboratory hard X-ray photoelectron spectroscopy of La${}_{1-x}$Sr${}_x$MnO${}_3$
• On the origin of CE-type orbital fluctuations in the ferromagnetic metallic La${}_{1.2}$Sr${}_{1.8}$Mn${}_2$O${}_7$