233 research outputs found
Characterization of the free-carrier concentrations in doped Ξ²-SiC crystals by Raman scattering
X-Ray Magnetic Circular Dichroism at the K edge of Mn3GaC
We theoretically investigate the origin of the x-ray magnetic circular
dichroism (XMCD) spectra at the K edges of Mn and Ga in the ferromagnetic phase
of Mn3GaC on the basis of an ab initio calculation. Taking account of the
spin-orbit interaction in the LDA scheme, we obtain the XMCD spectra in
excellent agreement with the recent experiment. We have analyzed the origin of
each structure, and thus elucidated the mechanism of inducing the orbital
polarization in the p symmetric states. We also discuss a simple sum rule
connecting the XMCD spectra with the orbital moment in the p symmetric states.Comment: 5 pages, 5 figures, accepted for publication in Physical Review
Π‘ΠΈΠ½ΡΠ΅Π· Π½ΠΈΠ·ΠΊΠΎΠ·Π°ΡΡΡΠ²Π°ΡΡΠΈΡ ΠΌΠ°ΡΠ΅Π» Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΎΠ»ΠΈΠ³ΠΎΠΌΠ΅ΡΠΎΠ² Π΄Π΅ΡΠ΅Π½Π° Π½Π° ΠΌΠΈΠΊΡΠΎ- ΠΈ ΠΌΠΈΠΊΡΠΎ-ΠΌΠ΅Π·ΠΎΠΏΠΎΡΠΈΡΡΡΡ ΡΠ΅ΠΎΠ»ΠΈΡΠ°Ρ Y
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ Π±ΡΡΠΎΠ²Π·ΡΡΠ²Π½ΡΡ ΡΠ°Π±ΠΎΡ Ρ ΠΏΡΡΠΌΡΠΌΠΈ Π²ΡΡΠ±Π°ΠΌΠΈ ΠΏΡΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠΈ Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ°Π»ΡΠ½ΡΡ Π³ΠΎΡΠ½ΠΎ-ΡΠ°Π·Π²Π΅Π΄ΠΎΡΠ½ΡΡ Π²ΡΡΠ°Π±ΠΎΡΠΎΠΊ
Phase-field approach to heterogeneous nucleation
We consider the problem of heterogeneous nucleation and growth. The system is
described by a phase field model in which the temperature is included through
thermal noise. We show that this phase field approach is suitable to describe
homogeneous as well as heterogeneous nucleation starting from several general
hypotheses. Thus we can investigate the influence of grain boundaries,
localized impurities, or any general kind of imperfections in a systematic way.
We also put forward the applicability of our model to study other physical
situations such as island formation, amorphous crystallization, or
recrystallization.Comment: 8 pages including 7 figures. Accepted for publication in Physical
Review
A meta-analysis of vitrectomy with or without internal limiting membrane peeling for macular hole retinal detachment in the highly myopic eyes
Diversity in the Visible-NIR Absorption Band Characteristics of Lunar and Asteroidal Plagioclase
Studying the visible and near-infrared (VNIR) spectral properties of plagioclase has been challenging because of the difficulty in obtaining good plagioclase separates from pristine planetary materials such as meteorites and returned lunar samples. After an early study indicated that the 1.25 m band position of plagioclase spectrum might be correlated with the molar percentage of anorthite (An#) [1], there have been few studies which dealt with the band center behavior. In this study, the VNIR absorption band parameters of plagioclase samples have been derived using the modified Gaussian model (MGM) [2] following a pioneering study by [3]
Sheath capacitance observed by impedance probes onboard sounding rockets: Its application to ionospheric plasma diagnostics
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