858 research outputs found
Testing the validity of THz reflection spectra by dispersion relations
Complex response function obtained in reflection spectroscopy at terahertz
range is examined with algorithms based on dispersion relations for integer
powers of complex reflection coefficient, which emerge as a powerful and yet
uncommon tools in examining the consistency of the spectroscopic data. It is
shown that these algorithms can be used in particular for checking the success
of correction of the spectra by the methods of Vartiainen et al [1] and
Lucarini et al [2] to remove the negative misplacement error in the terahertz
time-domain spectroscopy.Comment: 17 pages, 4 figure
Charge ordering and chemical potential shift in LaSrNiO studied by photoemission spectroscopy
We have studied the chemical potential shift in LaSrNiO and
the charge ordering transition in LaSrNiO by
photoemission spectroscopy. The result shows a large ( 1 eV/hole)
downward shift of the chemical potential with hole doping in the high-doping
regime ( 0.33) while the shift is suppressed in the low-doping
regime ( 0.33). This suppression is attributed to a
segregation of doped holes on a microscopic scale when the hole concentration
is lower than . In the sample, the
photoemission intensity at the chemical potential vanishes below the charge
ordering transition temperature 240 K.Comment: 5 pages, 4 figure
Survival Wolio Language in Adulthood in Baubau City: Sociolinguistic Study
The article is the result of a study that discusses the survival of Wolio language in adolescence in Baubau City. The focus of this study is adults aged between 17-20 years. As for the domain of the question is the family, association, education, government, transactions, neighbors, religion, culture, art. In this research, the approach used is the sociolinguistic approach. In this case, the approach (approach) of sociology, namely the study of language in the social context, which is studied is the behavior of groups rather than individual behavior. In analyzing the data is done by calculating the percentage following the calculation pattern, that is the calculation based on the number of incoming answers) The results are found Wolio language Based on the analysis shows that in the adult category the tendency of the use of Wolio language has been in the category even though on the defense side still last
Effect of Stripes on Electronic States in Underdoped La_{2-x}Sr_xCuO_4
We investigate the electronic states of underdoped La_{2-x}Sr_xCuO_4 (LSCO)
by using a microscopic model, i.e., t-t'-t''-J model, containing vertical
charge stripes. The numerically exact diagonalization calculation on small
clusters shows the consistent explanation of the physical properties in the
angle-resolved photoemission, neutron magnetic scattering and optical
conductivity experiments such as the antiphase domain and quasi-one-dimensional
charge transport. The pair correlation function of the d-channel is suppressed
by the stripes. These results demonstrate a crucial role of the stripes in LSCOComment: 4 pages, 4 EPS figures, revised version, to appear in Phys. Rev.
Lett. Vol.82, No.25, 199
Diffusion and activation of n-type dopants in germanium
The diffusion and activation of -type impurities (P and As) implanted into
-type Ge(100) substrates were examined under various dose and annealing
conditions. The secondary ion mass spectrometry profiles of chemical
concentrations indicated the existence of a sufficiently high number of
impurities with increasing implanted doses. However, spreading resistance probe
profiles of electrical concentrations showed electrical concentration
saturation in spite of increasing doses and indicated poor activation of As
relative to P in Ge. The relationships between the chemical and electrical
concentrations of P in Ge and Si were calculated, taking into account the
effect of incomplete ionization. The results indicated that the activation of P
was almost the same in Ge and Si. The activation ratios obtained experimentally
were similar to the calculated values, implying insufficient degeneration of
Ge. The profiles of P in Ge substrates with and without damage generated by Ge
ion implantation were compared, and it was clarified that the damage that may
compensate the activated -type dopants has no relationship with the
activation of P in Ge.Comment: 6 pages, 4 figure
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