669 research outputs found
An Unfinished Canvas: Teacher Preparation, Instructional Delivery, and Professional Development in the Arts
Based on surveys, interviews, and secondary data analyses, identifies deficiencies in teacher preparation, instruction, and development in the arts in California, and recommends minimum training requirements and support for professional development
Are Household Food Expenditures Responsive to Entry Into the Supplemental Nutrition Assistance Program?*
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/115937/1/ssqu12197.pd
X-ray induced electronic structure change in CuIrS
The electronic structure of CuIrS has been investigated using various
bulk-sensitive x-ray spectroscopic methods near the Ir -edge: resonant
inelastic x-ray scattering (RIXS), x-ray absorption spectroscopy in the partial
fluorescence yield (PFY-XAS) mode, and resonant x-ray emission spectroscopy
(RXES). A strong RIXS signal (0.75 eV) resulting from a charge-density-wave gap
opening is observed below the metal-insulator transition temperature of 230 K.
The resultant modification of electronic structure is consistent with the
density functional theory prediction. In the spin- and charge- dimer disordered
phase induced by x-ray irradiation below 50 K, we find that a broad peak around
0.4 eV appears in the RIXS spectrum.Comment: 4 pages and 4 figure
Resonant inelastic X-ray scattering study of overdoped LaSrCuO
Resonant inelastic x-ray scattering (RIXS) at the copper K absorption edge
has been performed for heavily overdoped samples of LaSrCuO
with and 0.30. We have observed the charge transfer and
molecular-orbital excitations which exhibit resonances at incident energies of
and 8.998 keV, respectively. From a comparison with previous
results on undoped and optimally-doped samples, we determine that the
charge-transfer excitation energy increases monotonically as doping increases.
In addition, the -dependences of the RIXS spectral weight and absorption
spectrum exhibit no clear peak at keV in contrast to results in
the underdoped samples. The low-energy ( eV) continuum excitation
intensity has been studied utilizing the high energy resolution of 0.13 eV
(FWHM). A comparison of the RIXS profiles at and
indicates that the continuum intensity exists even at in the
overdoped samples, whereas it has been reported only at and
for the sample. Furthermore, we also found an additional excitation on
top of the continuum intensity at the and positions.Comment: 7 pages, 7 figure
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