Library

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
    Giant negative magnetoresistance in a nonmagnetic semiconductor (1999)
    Springer
    JETP letters 69 (1999), S. 386-391 
    Details
    ISSN: 1090-6487
    Keywords: 75.30.Vn ; 72.20.My
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Studies of a classical III–V semiconductor (InSb) doped with 3d magnetic ions (Mn2+, having a localized spin S=55/2) reveal some unexpected transport properties. It is found that the transition from the metallic to the low-temperature insulator phase occurs at an impurity concentration N Mn∼N cr=2× 1017 cm−3 and a temperature T〈T cr∼1 K. Under these conditions a giant negative magnetoresistance arises. The experimental results can be explained in terms of the onset of a hard Mott-Hubbard gap Δ in the impurity band formed by the shallow manganese acceptor in InSb at N Mn∼N cr. A model describing the gap formation is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.568039
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Strong luminescence from Tamm states in modulation-doped superlattices (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 691-693 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Calculations are presented for the photoluminescence spectrum of InP/In0.53Ga0.47As superlattices doped with Si. When doping is confined to the inner barriers, the photoluminescence is dominated by transitions between Tamm states in the electron and valence bands, which contribute with an optical band at energies higher than the In0.53Ga0.47As band gap. These results are in good agreement with experimental observations. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1346627
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Intermediate 16+16 multiplets inN=1 supergravity (1986)
    Springer
    The European physical journal 31 (1986), S. 245-248 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the formalism developed by Ogievetsky and Sokatchev forN=1 Supergravity, we analyse the intermediate 16+16 sets (with one auxiliary spinor).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01479533
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Compactification on non-symmetric six dimensional coset spaces with torsion (1988)
    Springer
    The European physical journal 40 (1988), S. 259-272 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The equations of motion of a ten dimensional model based on the Chapline-Manton lagrangian, modified by higher derivative terms, are solved using six dimensional coset spaces with torsion. Minkowski space, anti-de Sitter, de Sitter and Einstein static cosmology with negative curvature are possible four dimensional cosmologies. In all case symmetry breaking schemesE 8×E 8→E 8×E 6 with chiral 27's ofE 6 can be obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01555888
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Spin forces in mesons made up of quarks of different mass (1981)
    Springer
    The European physical journal 11 (1981), S. 31-36 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract With the help of a variational method we apply the standard Coulomb + Linear potential to the analysis of mesons constructed from quarks of different mass. Fine and hyperfine splittings are discussed, with particular emphasis on their asymptotic behaviour. Striking differences in this behaviour are predicted to occur compared with the case of mesons built up from equal mass quarks, with the spin-orbit mixing force playing here a fundamental role. Such predictions may be tested within the bottom $$(b\bar u)$$ meson family. Our considerations are also extended to the strange and charmed mesons. Our model favours ak(O+) below theK * (1.430), and predicts a partial inversion in the ordering of theP-wave states of the charmed mesons $$(c\bar u)$$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01571554
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    A study of the charmonium, upsilon and strangeonium systems (1979)
    Springer
    The European physical journal 2 (1979), S. 309-312 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the charmonium, upsilon and strangeonium systems with a linear+Coulomb potential, in the high α s regime. Our approach is based on the Bethe-Salpeter equation, in ladder approximation, and the most interesting conclusion of our work seems to be that it is not possible to fit these three families of mesons using the same set of values for the parameters defining the potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01545891
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Light-mesons with a non-relativistic potential model (1983)
    Springer
    The European physical journal 18 (1983), S. 213-218 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A non-relativistic potential model is applied to the study of light-meson spectroscopy. The general agreement between the predictions of the model and the data is good, but some resonances, among them the ε(1.300), ϕ(1.640) andS *(0.980), are not easily explained. Another potential source of problems concerns the situation of the 1D-wave states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01571362
    Library Location Call Number Volume/Issue/Year 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...