Intercalation and staging behavior in super-oxygenated La2CuO4 + δ
نویسندگان
چکیده
منابع مشابه
ar X iv : c on d - m at / 9 50 71 24 v 1 2 7 Ju l 1 99 5 Intercalation and Staging Behavior in Super - Oxygenated
A high temperature electrochemical oxidation process has been used to produce large single crystals of La 2 CuO 4+δ suitable for neutron scattering experiments. Below room temperature the oxygen-rich phases have structural superlattice scattering peaks which indicate new period-icities ranging from 2 to 6.6 layers perpendicular to the copper oxide planes. A model structure originally proposed f...
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First-principles band structure calculations for large supercells of Ba2CuO4−δ and La2CuO4−δ with different distributions and concentrations of oxygen vacancies show that the effective doping on copper sites strongly depends on where the vacancy is located. A vacancy within the Cu layer produces a weak doping effect while a vacancy located at an apical oxygen site acts as a stronger electron do...
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15 صفحه اولSpin waves and electronic interactions in La2CuO4.
The magnetic excitations of the square-lattice spin-1/2 antiferromagnet and high- T(c) parent compound La2CuO4 are determined using high-resolution inelastic neutron scattering. Sharp spin waves with absolute intensities in agreement with theory including quantum corrections are found throughout the Brillouin zone. The observed dispersion relation shows evidence for substantial interactions bey...
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ژورنال
عنوان ژورنال: Zeitschrift für Physik B Condensed Matter
سال: 1996
ISSN: 0722-3277,1431-584X
DOI: 10.1007/s002570050158