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Energy Band and Absorption Coefficient of Quantum Dots in a Well Structure

100%
Zhang P., Lu X., Zhang C., Yao J.
Acta Physica Polonica A
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2012
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vol. 122
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issue 1
197-201
EN
Building on the effective-mass envelope function theory, this paper focuses on the study of the energy band and the absorption coefficient of InAs/In_{x}Ga_{1 - x}As quantum dots in a well (DWELL) structure. In contrast to InAs/In_{0.15}Ga_{0.85}As quantum DWELL, the InAs/In_{0.2}Ga_{0.8}As quantum DWELL has lower ground states. With the thickness of In_{0.15}Ga_{0.85}As layer changing from 7 nm to 9 nm and In_{0.2}Ga_{0.8}As layer changing from 9 nm to 12 nm, the calculation shows that their absorption coefficient spectra takes a red shift in the long-wave infrared and far-infrared ranges, respectively. Moreover, when the thickness of the In_{x}Ga_{1 - x}As layer is defined as 9 nm, the absorption coefficient spectra of InAs/In_{0.2}Ga_{0.8}As DWELL shows a obvious red shift comparing with that of InAs/In_{0.15}Ga_{0.85}As DWELL.
2
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Effect of Granule Shape on the Giant Magnetoresistance for Ferromagnetic Metal-Metal Granular Films

100%
Wang C., Zhang P., Zhang Y., Rong Y.
Acta Physica Polonica A
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2007
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vol. 112
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issue 6
1231-1238
EN
In order to investigate the effect of granule shape on the giant magnetoresistance, assuming that granular films consist of ellipsoidal ferromagnetic granules embedded in a nonmagnetic metal matrix and the ellipsoidal granules have different demagnetizing factors in three directions, we combined two-current model with the effective medium theory to investigate the effect of granule shape on the giant magnetoresistance. The results revealed that the giant magnetoresistance in granular films depended strongly on the granule shape and was between those for current perpendicular to the plane of the layers and current in the plane of the layers in magnetic multilayers.
3
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The Interaction of Water with Glycine: A Combined Inelastic Neutron Scattering and Raman Spectra Studies

88%
Zhang P., Zhang Y., Han S., Yan Q., Li J.
Acta Physica Polonica A
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2006
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vol. 109
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issue 3
399-404
EN
The vibrational dynamics of water around glycine was investigated by using Raman spectroscopy and inelastic neutron scattering. Experiments of deuterated glycine versus deuterium were performed as comparison. The study shows that for glycine, the exchange of proton-deuteron on the active NH_3^+ side was easy, whereas there was hardly exchange on the CH_2 side. Comparing different proportion of glycine vs. water molecules we obtained that the presence of water hardly changes the main features of glycine illustrating its hydrophobic character. The intralayer hydrogen bonds of glycine crystal are difficult to be replaced due to its stronger bond than water.
4
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Expression analysis of multifunctional RNA-binding protein hnRNP K during development of mammalian testis

76%
Xu H., Zhang P., Li R., Wu W., Wang S., Xu Y.
Polish Journal of Veterinary Sciences
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2018
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vol. 21
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issue 2
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