GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Effect of alloy scattering on the longitudinal hot electron drift velocity in n-Hg0.8Cd0.2Te in the extreme-quantum-limit magnetic fields at low temperatures (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 1231-1233 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Longitudinal hot electron drift velocity in n-Hg0.8Cd0.2Te in the extreme quantum limit has been investigated at low temperatures using displaced Maxwellian approximation. The model includes various complexities such as band nonparabolicity, quantum screening due to magnetic quantization, and Landau level broadening due to impurity fluctuations. The influence of alloy scattering on the drift velocity has been examined. The field dependences of hot electron drift velocity in n-Hg0.8Cd0.2Te have also been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356463
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Energy- and momentum-loss rates of one-dimensional hot electrons in semiconductor quantum-well wires (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 1598-1601 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Energy- and momentum-loss rates of degenerate hot electrons moving one-dimensionally in a quantum-well wire structure of square cross section of side length L are calculated theoretically considering polar coupling to longitudinal-optic (LO) phonons and deformation potential and piezoelectric couplings to acoustic phonons. Piezoelectric scattering contributes the least, while the effect of deformation potential scattering in energy loss is unimportant compared to that of LO phonon scattering for electron temperatures (Te) above about 50 K. In momentum-loss rate, however, acoustic scattering continues to be important at higher values of Te. The nonequilibrium distribution of LO phonons is found to reduce both the energy- and momentum-loss rates. The reduction factor of the total energy-loss rate is 4.4 for L=10 nm and 6.2 for L=6 nm at Te =100 K. The corresponding values for the net momentum-loss rate are 2.3 and 2.5, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342951
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Thermoelectric power of two-dimensional electron gas in heterojunctions at low temperatures (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 5080-5083 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The low-temperature thermopower of two-dimensional electron gas has been calculated by using the expression obtained from the Boltzmann equation. The relevant scattering mechanisms are taken into account. It is found that the calculated thermopower increases almost linearly with temperature in the GaAs-AlGaAs and InGaAs-InP structures, but in all cases the results differ widely from the values given by the Mott formula and also from the experimental values. The results are not influenced by phonon scattering and are slightly affected if the impurity density is changed by the order of magnitude. For high-mobility samples, the experimental values are higher than the theoretical ones and it seems that phonon drag thermopower may account for the difference. For low-mobility samples, however, the experimental values are lower and in some cases decrease with temperature. The present model is then inadequate. Possible refinements of the theory are suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338332
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Hot-electron conduction in Hg0.8Cd0.2Te in the extreme magnetic quantum limit at low temperatures (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4041-4045 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A theoretical analysis of hot-electron transport in narrow-gap semiconductors under a large magnetic field is developed at low temperatures. The energy relaxation time and the electric-field dependence of the drift velocity of hot electrons in Hg0.8Cd0.2Te at 1.5 K in the extreme quantum limit, i.e., when all the electrons occupy the lowest Landau subband, are calculated. The model includes scattering by the acoustic phonons and other complexities such as the band nonparabolicity, free-carrier screening, nonequipartition of phonons, and the level broadening due to electron-impurity interactions. The theoretical results are compared with the experimental data on the energy relaxation time in Hg0.8Cd0.2Te for magnetic flux densities of 4 and 6 T. When the equilibrium phonon distribution is considered, the theoretical values are found to be several times less than the experimental values. The discrepancy is attributed to the nonequilibrium phonons or "hot phonons'' that exist under hot-electron conditions. Including the hot-phonon effects, the theoretical results are in satisfactory agreement with the experimental data, giving a reasonable estimate of the phonon life time. The model has been applied to calculate the electric field dependence of the drift velocity of hot electrons in Hg0.8Cd0.2Te at 1.5 K in the extreme quantum limit by assuming scattering by the nonequilibrium acoustic phonons and ionized impurities, and a satisfactory agreement with the experimental results is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341337
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Low field mobility and thermopower in one-dimensional electron gas (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 1070-1074 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A scattering theory of one-dimensional electron gas formed in a narrow channel GaAs-AlGaAs high electron mobility transistor has been developed. The mobility values for the different scattering mechanisms have been computed and their variation with temperature has been presented. The various scattering processes include acoustic phonon scattering for both deformation potential and piezoelectric scattering mechanisms, impurity scattering, and surface roughness scattering at lower temperatures and polar optic phonon scattering at higher temperatures. The effect of dynamic screening has also been included. Finally, the temperature variation of thermopower for different 1D electron concentrations has been shown and attempts have been made to interpret the results obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346746
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Estimation of the alloy scattering strength in Hg0.8Cd0.2Te from the magnetic field dependence of the longitudinal resistivity in the extreme quantum limit (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 1467-1470 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic field dependence of the longitudinal resistivity in Hg0.8Cd0.2Te at a lattice temperature of 4.2 K has been studied theoretically in the extreme quantum limit (EQL) considering the electron scattering by the acoustic phonons, the ionized impurities and the alloy disorder. The calculation includes band nonparabolicity, free carrier screening and nonequipartition of acoustic phonons. The theoretical longitudinal resistivity of Hg0.8Cd0.2Te in the EQL shows a magnetic field dependence as Bn where n=0.24. The alloy scattering strength is estimated by fitting the theoretical results with the experimental results of the longitudinal resistivity of Hg0.8Cd0.2Te in the EQL at 4.2 K, where Hg0.8Cd0.2Te behaves as a free electron gas and the Wigner crystallization is not observed. Its value is found to be exactly the difference in the band-gap energies of HgTe and CdTe in agreement with the other calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349559
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Correlation between the gate bias dependence of the probability of anode hole injection and breakdown in thin silicon dioxide films (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 4350-4352 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Hole injection from the anode in thin silicon dioxide (SiO2) films in n+-polycrystalline silicon gate–oxide–silicon structures has been theoretically investigated during high-field Fowler–Nordheim electron injection from both substrate (positive gate bias) and gate (negative gate bias). Theoretical results of the gate bias dependence of the probability of anode hole injection per injected electron αh as a function of electric field or injection current density are shown to be directly correlated to experimentally observed polarity dependence of destructive breakdown in thin SiO2 films. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1332838
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    EFFECT OF DELTA-9-TETRAHYDROCANNABINOL ON GANGLIOSIDES AND SIALOGLYCOPROTEINS IN SUBCELLULAR FRACTIONS OF RAT BRAIN (1976)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 26 (1976), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: —The present paper reports the result of studies undertaken to determine the effects of the in vivo administration of Δ9-THC on the ganglioside and sialoglycoprotein contents of rat brain subcellular fractions. Results indicate that the administration of the drug under both acute and chronic conditions brings about characteristic changes in the sialoglycoproteins and ganglioside content in all the subcellular fractions. Both sialoglycoproteins and ganglioside contents were markedly increased in microsomal and synaptosomal fractions and decreased in the mitochondrial fractions although the increase in the synaptosomal fractions has been found to be most striking.After chronic treatment, both ganglioside and sialoglycoprotein content did not change substantially in all the fractions except for a small increase in case of synaptosomal fractions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1976.tb04442.x-i1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    EFFECT OF DELTA-9-TETRAHYDROCANNABINOL ADMINISTRATION ON THE LIPID CONSTITUENTS OF RAT BRAIN SUBCELLULAR FRACTIONS (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 24 (1975), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An investigation on the effects of acute (10 mg/kg) and chronic (10 mg/kg for 15 days) treatment with Δ9-THC administration by the intraperitoneal route, on the cholesterol, cerebroside and individual phospholipid contents in microsomal, synaptosomal, mitochodrial and myelin fractions from adult rat brain, is reported. The drug has been found to affect the different subcellular membranous lipid and phospholipid components in a characteristic manner.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1975.tb11891.x
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Plasmacytoma of anterior maxilla mimicking periapical cyst (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Dental traumatology 8 (1992), S. 0 
    Details
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract An unusual case of plasmacytoma mimicking a large periapical cyst in the anterior maxilla is described. Of the involved teeth, 22 was discoloured and had an open, immature apex, a feature strongly suggestive of the lesion being of pulpal origin. The case was treated by a conservative endodontic approach, but failed to show any improvement. Apical surgery comprising complete enucleation of the cystic lesion and extraction of the involved tooth was carried out. The unexpected histopathological finding was a plasmacytoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-9657.1992.tb00225.x
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...