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
Filter
  • Electronic Resource  (26)
Source
Material
  • Electronic Resource  (26)
Years
  • 11
    Electronic Resource
    Electronic Resource
    NMR in metals at low temperatures with particular emphasis on the finite skin depth
    Amsterdam : Elsevier
    Physica B: Physics of Condensed Matter 194-196 (1994), S. 321-322 
    Details
    ISSN: 0921-4526
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0921-4526(94)90490-1
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Density of states in type-II superconductors in high magnetic fields (1975)
    Springer
    The European physical journal 21 (1975), S. 263-267 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the Gorkov theory as modified by Eilenberger we derive a consistent calculation scheme for the density of states near the upper critical field. This method applies to arbitrary impurity concentration and becomes in particular simple in the clean limit. Special attention was paid to the effect of anisotropic impurity scattering (p-waves).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313306
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Depinning and wetting in two-dimensional Potts and chiral clock models (1987)
    Springer
    The European physical journal 69 (1987), S. 295-301 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The interplay of depinning and interfacial adsorption or wetting phenomena is studied for two-dimensional three-state Potts and chiral clock models where the variables on opposite boundaries are fixed in different states and the interactions near one of the surfaces are weakened compared to the ones in the bulk. Using a transfer matrix approach and Monte Carlo techniques a new interfacial multicritical point is found at which both interfacial properties become critical simultaneously. However, in general the two types of transitions are decoupled.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307288
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    Theory of the density of states of pure type-II superconductors in high magnetic fields (1967)
    Springer
    The European physical journal 201 (1967), S. 209-221 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper deals with the theory of the density of states of pure type-II superconductors in high magnetic fields. An approximate expression of theGreen's function is derived by using the fact that it has the periodicity of the lattice of flux lines in the center-of-mass coordinates. In comparison to the normal stateGreen's function a correction term proportional to the absolute square of the order parameter arises. This is seen to act as a self-energy part depending strongly on the polar angleΘ of the “quasiparticle” momentum relative to the direction of the field. The corresponding density of states, as a function of the excitation energy, is found to vary from the gapless to the BCS type as the parameterΘ changes fromπ/2 to zero (orπ). The averaged state density varies gradually from a uniform to a BCS-like state density as the external field decreases sufficiently far below the upper critical field. The results of the present theory for the averaged density of states agree fairly well with the results due to a conjecture byMaki if the field is very close to the upper critical field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326812
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 15
    Electronic Resource
    Electronic Resource
    On the roughening transition in the Potts model (q=2, 3) in two and three dimensions (1984)
    Springer
    The European physical journal 58 (1984), S. 63-68 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Roughening-respectively depinning-transitions of interfaces between regions of different phases are considered in theq-state Potts model (q=2, 3) in two and three dimensions. For two dimensions the depinning temperatureT R is obtained from transfer matrix calculations. In three dimensions we have used a low temperature expansion in a solid-on-solid type approximation to determine the roughening temperatureT R and the critical exponents for some moments of the interface profile nearT R .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01469438
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 16
    Electronic Resource
    Electronic Resource
    Transfer matrix analysis of the two-dimensional ANNNI model (1985)
    Springer
    The European physical journal 59 (1985), S. 317-323 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The two-dimensional axial next-nearest neighbour Ising (ANNNI) model is studied for the first time by a transfer matrix method for semi-infinite strips (N×∞;N≦13). One obtains the thermodynamic properties and, more important, the correlation functions, which display directly the various magnetic structures. In one part of the phase diagram where a disorder line is believed to follow closely the ferromagnetic transition line the critical exponents appear to deviate from the expected ones. ForN≧13 a variational procedure is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307437
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 17
    Electronic Resource
    Electronic Resource
    Nonlinear analysis of spatial structures in two-dimensional anisotropic pattern forming systems (1986)
    Springer
    The European physical journal 63 (1986), S. 121-130 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Motivated in particular by recent experiments on convective instabilities in nematic liquid crystals we examine the possible stationary patterns in anisotropic quasi-two-dimensional systems. The generalized SH-model we use exhibits the typical Lifshitz point, which separates the regions of normal and of oblique rolls at threshold. Above threshold the two-dimensional wavenumber regions of stable roll solutions take on interesting shapes in the vicinity of the Lifshitz point. Undulated (wavy) rolls also exist metastably in a narrow parameter range. We derive envelope equations which show that this scenario is general near threshold. Our results suggest experimental investigation, especially in the neighborhood of the Lifshitz point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01312586
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 18
    Electronic Resource
    Electronic Resource
    Thermodynamic behaviour of type II superconductors at low induction for arbitrary temperature and impurity content (1987)
    Springer
    The European physical journal 68 (1987), S. 49-56 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using Eilenberger's equations in vortex symmetry, we calculate numerically the structure of an isolated flux line and the lower critical field of a type II superconductor as functions of temperature and impurity content. In order to describe in addition the low-induction regime of the mixed state, a circular-cell approximation is introduced and compared with recent exact results of the Eilenberger theory. The agreement is excellent, if the flux-line overlap is weak. Within this approach it is shown that the nature of the phase transition at the lower critical field depends very sensitively on anisotropies of the Fermi surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307863
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 19
    Electronic Resource
    Electronic Resource
    Self-consistent approximations for itinerant ferromagnets above the phase transition point (1970)
    Springer
    The European physical journal 238 (1970), S. 121-129 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The “conserving and self-consistent” approximation scheme of Kadanoff and Baym is generalized to systems of particles of non-zero spin. The additional conservation law of the total spin of the system restricts the possible approximations for the self-energy part, and thus the approximations for the irreducible vertex part occuring in the equation for the correlation function. This guarantees, for instance, the correct behavior of the dynamical susceptibility in the long wave length limit. Two examples are discussed under these aspects: the Hartree-Fock and theT-matrix approximation for the self-energy part and the resulting susceptibility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01399298
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 20
    Electronic Resource
    Electronic Resource
    Temperature and purity dependence of the nuclear-spin relaxation rate in the gapless region of type-II superconductors (1966)
    Springer
    The European physical journal 197 (1966), S. 46-57 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The volume average of the nuclear-spin relaxation rate in type-II superconductors,R s, is calculated for magnetic fields slightly below the upper critical field and all mean free paths,l, and temperatures. It is found to be expressible solely in terms of the volume average of the density of states, $$\bar N(\omega )$$ , where the latter quantity has been determined recently byNeumann for alll. The derivation is based onHelfand andWerthamer's eigen-value equation for the order parameter,Δ. The deviation of $$\bar R_s $$ from the relaxation rate in the normal state,R n, is proportional to the quantity $$[|\overline {\Delta |^2 } /\Delta _{BCS}^2 (T)]R_n $$ (the bar denotes the spatial average). The proportionality factor is found to decrease monotonously as the temperature decreases and/orl increases. This behavior is closely related to the fact that $$\bar N(\omega )$$ shows no gap for the excitation energiesω and decreases asl increases, in particular at energiesω close to zero (ω=0 corresponds to the Fermi energy).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333085
    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...