LaNiO3: A study by electron spectroscopy

Kemp, J.P.; Cox, P. A.

doi:10.1016/0038-1098(90)90236-5

Cited by 34 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spectrum was recorded using He II radiation and at a sample temperature of 145 K. The broad band between ∼ 8 eV and ∼ 1 eV binding energies is principally of O 2p character and its general appearance is a familiar feature of photoemission spectra from transition metal oxides. To make a more specific comparison, the width and form of this feature compares favourably with previously published ultraviolet photoemission data from LaNiO 3 and NdNiO 3 [15], [16]. This is to be expected, given that the dominant contribution to the spectra in the 20-40 eV photon energy range is from oxygen and that the O site in the rare-earth nickelates is essentially identical.…”

supporting

confidence: 71%

A photoemission spectroscopy study of PrNiO ₃ through the metal-insulator transition

et al. 1997

View full text Add to dashboard Cite

In this paper we report ultraviolet photoemission data from PrNiO3, the first member of the rare-earth nickelate series to undergo a metal-to-insulator transition at a finite temperature, TMI. Photoemission spectra from the Fermi level region as a function of temperature show the clear opening-up of the gap in the quasi-particle density of states at TMI. A discontinuity in the slope of the integrated photoemission signal from the immediate Fermi level region allows an exact determination of TMI. Near Fermi level spectra from LaNiO3, which does not exhibit a metal-to-insulator transition, are shown alongside the PrNiO3 data for comparison.

show abstract

supporting

confidence: 71%

A photoemission spectroscopy study of PrNiO ₃ through the metal-insulator transition

et al. 1997

View full text Add to dashboard Cite

show abstract

“…3) gives the slope dS(T)/dT  -0.03888 V/K 2 . Using this slope value in equation ( 2) we obtained the Fermi energy EF  0.32 eV which is smaller than the EF  0.41 eV for NdNiO3 (HOP), EF  0.40 eV for PrNiO3, and EF  0.21 eV for LaNiO3 [30,39,40].…”

Section: Resultsmentioning

confidence: 92%

Electronic properties and the nature of metal–insulator transition in NdNiO3 prepared at ambient oxygen pressure

Hooda

Yadav

2016

Physica B: Condensed Matter

View full text Add to dashboard Cite

We report the electronic properties of the NdNiO3, prepared at the ambient oxygen pressure condition. The metal-insulator transition temperature is observed at 192 K, but the low temperature state is found to be less insulating compared to the NdNiO3 prepared at high oxygen pressure. The electric resistivity, Seebeck coefficient and thermal conductivity of the compound show large hysteresis below the metal-insulator transition. The large value of the effective mass (m* ~ 8me) in the metallic state indicate the narrow character of the 3d band. The electric conduction at low temperatures (T = 2 -20 K) is governed by the variable range hopping of the charge carriers.

show abstract

“…All of these peaks present a doublet due to a shakeup process, inducing a satellite peak for each O2p → La4f and O2p → Ni3d bond. 22 As represented in Fig. 10, the emission peaks in the binding energy range of 830-840 eV correspond to La 3d 5/2 states, whereas the binding energies from 848 to 868 eV can be attributed to La 3d 3/2 and Ni 2p 3/2 states with their satellites.…”

Section: B Ex Situ Structural Characterizationmentioning

confidence: 98%

Reversible phase transformation ofLaNiO3−xthin films studiedin situby spectroscopic ellipsometry

et al. 2007

View full text Add to dashboard Cite

An in situ spectroscopic ellipsometry study has been performed to investigate LaNiO 3−x phase transition associated with oxygenation and/or reduction reversible treatments. Epitaxial thin films of LaNiO 3 were deposited onto SrTiO 3 ͑001͒ substrates by pulsed laser deposition. Reduction of oxygen stoichiometry of these films under high vacuum, which leads to compound with the formula LaNiO 3−x , is realized in the deposition chamber and studied in situ by spectroscopic ellipsometry. Phases belonging to the series LaNiO 3−x with 0 ഛ x ഛ 1 appear at high temperatures and lead to modifications of the optical properties, such as the refractive index and the extinction coefficient, which can be monitored by spectroscopic in situ ellipsometry. These phase changes are associated with a metal-insulator transition. Specifically, modifications occur in the nickel environment, in particular, part of the Ni-polyhedron change from an octahedral symmetry ͑with Ni 3+ ͒ to partial squared plane symmetry ͑with Ni 2+ ͒. The reversible oxygenation process is observed by in situ ellipsometry in the temperature range from 473 to 573 K. The thermal variation of the refractive index exhibits a "first-orderlike" transition whose amplitude depends on the oxygen pressure. The sensitivity of the oxygen deficient LaNiO 3−x to the reoxygenation can be demonstrated not only through electrical properties, as commonly shown, but also through optical properties with a noncontact measurement. Ex situ x-ray photoelectron spectroscopy exhibits the presence of hydroxide, both La-OH and Ni-OH, at the surface, confirming the hygroscopic behavior of the lanthanum compound. In spite of this dominant surface reaction, a modification in the photoemission spectra can be observed for the oxygen deficient LaNiO 3−x samples. This seems to indicate a loss of oxygen atoms in the LaO plane, leading to a modified perovskite structure. Furthermore, a too long reduction process drives to the irreversible creation of the highly insulating La 2 NiO 4 phase with a segregation of NiO.

show abstract

LaNiO3: A study by electron spectroscopy

Cited by 34 publications

References 18 publications

A photoemission spectroscopy study of PrNiO ₃ through the metal-insulator transition

A photoemission spectroscopy study of PrNiO ₃ through the metal-insulator transition

Electronic properties and the nature of metal–insulator transition in NdNiO3 prepared at ambient oxygen pressure

Reversible phase transformation ofLaNiO3−xthin films studiedin situby spectroscopic ellipsometry

Contact Info

Product

Resources

About

LaNiO3: A study by electron spectroscopy

Cited by 34 publications

References 18 publications

A photoemission spectroscopy study of PrNiO 3 through the metal-insulator transition

A photoemission spectroscopy study of PrNiO 3 through the metal-insulator transition

Electronic properties and the nature of metal–insulator transition in NdNiO3 prepared at ambient oxygen pressure

Reversible phase transformation ofLaNiO3−xthin films studiedin situby spectroscopic ellipsometry

Contact Info

Product

Resources

About

A photoemission spectroscopy study of PrNiO ₃ through the metal-insulator transition

A photoemission spectroscopy study of PrNiO ₃ through the metal-insulator transition