&lt;title&gt;Nanoindentation of CAM:OMA polymer thermoplastic layers&lt;/title&gt;

Palistrant, N. A.; Meinhard, Holger; Grau, P.; Bivol, V. V.; Robu, Ştefan

doi:10.1117/12.583025

Cited by 2 publications

(6 citation statements)

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“…In this work, the results are presented briefly and concisely, they allow understanding the overall picture of occurring processes. For more details of this problem, in addition to [9], see [27] and [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

The Upper Critical Field H c2 in Advanced Superconductors with Anisotropic Energy Spectrum

Palistrant

2010

J Supercond Nov Magn

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A brief review of works on the microscopic theory of determining the upper critical field in twoband isotropic and anisotropic superconductors is given. The research is based on a set of the Ginzburg-Landau equations for the order parameters in a magnetic field that are studied in terms of the classical approach to a superconducting system in a magnetic field. Two inequivalent energy bands with different topology of Fermi surface cavities overlapping on the Fermi surface are discussed. The cases of the direction of the external magnetic field // the (ab) plane and // the crystallographic c axis are studied. The equations for determining H c2 (ab) and H c2 (c) for a pure superconductor and a superconductor doped with electrons and holes are derived. The analytical solutions to these equations in the vicinity of the superconducting transition temperature (T c -T<

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Section: Introductionmentioning

confidence: 99%

The Upper Critical Field H c2 in Advanced Superconductors with Anisotropic Energy Spectrum

Palistrant

2010

J Supercond Nov Magn

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“…were µ 0 (T ) is the chemical potential of the normal phase, and R 0 is determined from the constancy of the carrier density in the superconducting and normal phases. Substituting (7) in (8) we readily obtain a jumplike change of dµ/dT . Contributions to this change are made by all the order parameters ∆ nm , so that the results can differ from those for the case of one band [40].…”

Section: System Hamiltonian and Basic Equationsmentioning

confidence: 99%

“…To investigate the properties of a two-band system near the superconducting -transition temperature we expand in Eqs. (2) and (6)in terms of the small parameters ∆ nm ∆ mn with account taken of expansions (7) and (8).…”

Section: Self-consistent System Of Equations For T = Tcmentioning

confidence: 99%

“…On the basis of this model Moscalenco and his colleagues have made a great number of studies long before the discovery the compound MgB 2 . Many modern authors to our pity represent their own results as originally new ones not making any references on the pioneer works of Moscalenco and his colleagues (see [7], [22]).…”

Section: Electron-phonon Mechanism Of Superconductivitymentioning

confidence: 99%

“…The main development stages of the superconducting theory of the systems with overlapping energy bands are presented in comment [7].…”

Section: Introductionmentioning

confidence: 99%

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Superconductivity in Two-Band System With Low Carrier Density

Palistrant

2005

Int. J. Mod. Phys. B

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In the article a review over the theory of superconductors with energy bands that overlap on Fermi surface at arbitrary densities of charge carriers (including reduced and very low) is done. All pairings of electrons that result in formation Cooper pairs of electrons from different energy bands as well as in every energy band are considered.The system of equations for four order parameters ∆ 11 , ∆ 22 , ∆ 12 , ∆ 21 and chemical potential µ is derived. Self-consistent approach is strictly necessary at µ ∼ ∆ nm . Transition to the effective four-band model leading to the temperature of superconducting transition is performed. Analytic and numeric solutions have been performed for two mechanisms of superconducting pairing -non-phonon and phonon one. The account of the additional in regards to Moscalenco model pairings of electrons from different bands or their hybridization gives an option to obtain the high values of T C even at reduced density of charge carriers. This hybridization influences greatly the form of the dependence of the quantity T C on the density of charge carriers as well as the jump of the electron heat capacity at the point T = T C . High and low values of the relative jump of electronic heat capacity at the point An application of the path integral method to the two-band model is developed and on this basis, the process of transition from the Fermi to the Bose pattern of elementary exitations at T = 0 in the presence of a two-particll bound state in the system is demonstratied.The expression for the temperature of Bose condensation T k is obtained and the contribution of the residual boson interactions is estimated for systems with different dimensions.The overlappining of the energy bands on the fermi surface is favorable for superconductivity and intensify some peculiarities of thermodinamic properties at low carrier density. This halps to their experimental confirmation.

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<title>Nanoindentation of CAM:OMA polymer thermoplastic layers</title>

Cited by 2 publications

References 0 publications

The Upper Critical Field H c2 in Advanced Superconductors with Anisotropic Energy Spectrum

The Upper Critical Field H c2 in Advanced Superconductors with Anisotropic Energy Spectrum

Superconductivity in Two-Band System With Low Carrier Density

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