Electronic Structure and Optical Properties of Zinc-Blende In
 
 x
 
 Ga
 
 1−
 x
 
 N
 y
 As
 1−y
 by a First-Principles Study

Shen, Yue; Pan, Lu; Yu, Zhongyuan; Zhao, Liang; Ye, Han; Liu, Yumin; Yuan, Guifang

doi:10.1088/0253-6102/55/4/34

Cited by 11 publications

(4 citation statements)

References 26 publications

(16 reference statements)

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“…The short dash dot(green) line corresponds to the spherical form of the nucleus. For the spherical nucleus, it has already been known that the form factor obtained with the 2PF model is very close to that determined by the Folding model [17]. Thus we will also make a comparison between the E2PF and EF form factors at the end of the paper.…”

Section: B Extension Of the Folding Model(ef)mentioning

confidence: 69%

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Effects of nuclear deformation on the form factor for direct dark matter detection

Chen¹,

Chen²,

Luo³

et al. 2012

Chinese Phys. C

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For direct dark matter detections, to extract useful information about the fundamental interaction from data, it is crucial to properly determine the nuclear form factor. The form factor for spinindependent cross section of collisions between dark matter particle and nucleus is thoroughly studied by many authors. When the analysis was carried out, the nuclei are always supposed to be spherically symmetric. In this work, we investigate the effects of deformation of nuclei from a spherical shape to an elliptical shape on the form factor. Our results indicate that as long as the ellipticity is not too large, such effects cannot cause any substantial effects, especially as the nuclei are randomly orientated in a room temperature circumstance one can completely neglect them.

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Section: B Extension Of the Folding Model(ef)mentioning

confidence: 69%

“…A number of models have been proposed [16,17] to describe the nuclear charge density or mass density. Among them the two-Parameter Fermi distribution(2PF) is one of the simple models.…”

Section: A Extension Of the Two-parameter Fermi Distribution(e2pf)mentioning

confidence: 99%

Effects of nuclear deformation on the form factor for direct dark matter detection

Chen¹,

Chen²,

Luo³

et al. 2012

Chinese Phys. C

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“…The numerical results show [32] that the form factors determined by the various models for the nuclear density do not deviate much from each other, therefore for not very high accuracy of measurement, one can use either of the models.…”

Section: The Si Cross Sectionmentioning

confidence: 90%

Introduction to the CDEX experiment

Kang

Cheng

et al. 2013

Front. Phys.

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Weakly Interacting Massive Particles (WIMPs) are the candidates of dark matter in our universe. Up to now any direct interaction of WIMP with nuclei has not been observed yet. The exclusion limits of the spin-independent cross section of WIMP-nucleon which have been experimentally obtained is about 10 −7 pb at high mass region and only 10 −5 pb at low mass region. China Jin-Ping underground laboratory CJPL is the deepest underground lab in the world and provides a very promising environment for direct observation of dark matter. The China Dark Matter Experiment (CDEX) experiment is going to directly detect the WIMP flux with high sensitivity in the low mass region. Both CJPL and CDEX have achieved a remarkable progress in recent two years. The CDEX employs a point-contact germanium semi-conductor detector PCGe whose detection threshold is less than 300 eV. We report the measurement results of Muon flux, monitoring of radioactivity and Radon concentration carried out in CJPL, as well describe the structure and performance of the 1 kg PCGe detector CDEX-1 and 10kg detector array CDEX-10 including the detectors, electronics, shielding and cooling systems. Finally we discuss the physics goals of the CDEX-1, CDEX-10 and the future CDEX-1T detectors.

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“…To check the uncertainty of adsorption energy, we further calculated and compared the adsorption energies of the most stable structure through different methods (GGA-PBE, GGA-PW91, and LDA-CA-PZ). [49] As shown in Table 2, the differences range from 0.031 eV to 0.054 eV which is one order of magnitude smaller than the adsorption energy and can be safely neglected. The uncertainty of the adsorption energy is estimated to be around 7.4%-8.75%.…”

Section: Structural Propertiesmentioning

confidence: 97%

Insights into the adsorption of water and oxygen on the cubic CsPbBr₃ surfaces: A first-principles study

Zhang¹,

Quhe²,

Lei³

2022

Chinese Phys. B

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The degradation mechanism of the all-inorganic perovskite solar cells in the ambient environment remains unclear. In this paper, water and oxygen molecule adsorptions on the all-inorganic perovskite (CsPbBr3) surface are studied by density-functional theory calculations. In terms of the adsorption energy, the water molecules are more susceptible than the oxygen molecules to be adsorbed on the CsPbBr3 surface. The water molecules can be adsorbed on both the CsBr- and PbBr-terminated surfaces, but the oxygen molecules tend to be selectively adsorbed on the CsBr-terminated surface instead of the PbBr-terminated one due to the significant adsorption energy difference. While the adsorbed water molecules only contribute deep states, the oxygen molecules introduce interfacial states inside the bandgap of the perovskite, which would significantly impact the chemical and transport properties of the perovskite. Therefore, special attention should be paid to reduce the oxygen concentration in the environment during the device fabrication process so as to improve the stability and performance of the CsPbBr3 based devices.

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Electronic Structure and Optical Properties of Zinc-Blende In _x Ga _{1−
x} N _y As _1−y by a First-Principles Study

Cited by 11 publications

References 26 publications

Effects of nuclear deformation on the form factor for direct dark matter detection

Effects of nuclear deformation on the form factor for direct dark matter detection

Introduction to the CDEX experiment

Insights into the adsorption of water and oxygen on the cubic CsPbBr₃ surfaces: A first-principles study

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Electronic Structure and Optical Properties of Zinc-Blende In x Ga 1− x N y As 1−y by a First-Principles Study

Cited by 11 publications

References 26 publications

Effects of nuclear deformation on the form factor for direct dark matter detection

Effects of nuclear deformation on the form factor for direct dark matter detection

Introduction to the CDEX experiment

Insights into the adsorption of water and oxygen on the cubic CsPbBr3 surfaces: A first-principles study

Contact Info

Product

Resources

About

Electronic Structure and Optical Properties of Zinc-Blende In _x Ga _{1−
x} N _y As _1−y by a First-Principles Study

Insights into the adsorption of water and oxygen on the cubic CsPbBr₃ surfaces: A first-principles study