Výsledky vyhledávání - "Jacob Szeftel"

Autor: Jacob Szeftel

The energies of spin singlet and triplet bound electron pairs are reckoned for electrons interacting through the Coulomb interaction, while sitting on neigbouring lattice sites. It is concluded that triplet pairs are unlikely to be observed due to sc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbd991a11032121671252b72b3441f8d
https://doi.org/10.20944/preprints202207.0074.v1

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A Novel Treatment of the Josephson Effect

Autor: Nicolas Sandeau, Michel Abou Ganthous, Jacob Szeftel

Publikováno v: Journal of Superconductivity and Novel Magnetism
Journal of Superconductivity and Novel Magnetism, 2022, 35 (1), pp.65-72. ⟨10.1007/s10948-021-06037-z⟩

A new picture of the Josephson effect is devised. The radio-frequency (RF) signal, observed in a Josephson junction, is shown to stem from bound electrons, tunneling periodically through the insulating film. This holds also for the microwave mediated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e706a003e9509f39206d37f28488d2e

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Towards room-temperature superconductivity

Autor: Michel Abou Ghantous, Muhammad El Saba, Nicolas Sandeau, Jacob Szeftel

Publikováno v: EPL-Europhysics Letters
EPL-Europhysics Letters, 2021, 134 (2), pp.27002. ⟨10.1209/0295-5075/134/27002⟩
EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2021, 134 (2), pp.27002. ⟨10.1209/0295-5075/134/27002⟩

By taking advantage of a stability criterion established recently, the critical temperature $T_c$ is reckoned with help of the microscopic parameters, characterising the normal and superconducting electrons, namely the independent-electron band struc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78e84551468af780c52128bc833b30b2
https://hal.science/hal-03235460/document

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Comment on ''Inconsistency of the conventional theory of superconductivity'' by Hirsch J.E

Autor: Michel Abou Ghantous, Jacob Szeftel, Antoine Khater, Nicolas Sandeau

Publikováno v: EPL-Europhysics Letters
EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2020, 131 (1), pp.17003. ⟨10.1209/0295-5075/131/17003⟩
EPL-Europhysics Letters, 2020, 131 (1), pp.17003. ⟨10.1209/0295-5075/131/17003⟩

A rebuttal of a recent article by Hirsch J.E. is presented below. To begin with, the main assumption, regarding the Meissner effect, which the whole argument relies upon, is disproved. Besides, the subsequent analysis misconstrues an original view of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3e80f4dadbc7a8789373a80be3e5f93
http://arxiv.org/abs/2003.00811

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Thermal Stability of Superconductors

Autor: Michel Abou Ghantous, Muhammad El-Saba, Nicolas Sandeau, Jacob Szeftel

Publikováno v: Journal of Superconductivity and Novel Magnetism
Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2021, 34 (1), pp.37-42. ⟨10.1007/s10948-020-05743-4⟩
Journal of Superconductivity and Novel Magnetism, 2021, 34 (1), pp.37-42. ⟨10.1007/s10948-020-05743-4⟩

A stability criterion is worked out for the superconducting phase. The validity of a prerequisite, established previously for persistent currents, is thereby confirmed. Temperature dependence is given for the specific heat and concentration of superc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9461e668d68cb897a3c3452fbc5faf5d

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Study of the Superconducting to Normal Transition

Autor: Nicolas Sandeau, Jacob Szeftel, Michel Abou Ghantous

Publikováno v: Journal of Superconductivity and Novel Magnetism
Journal of Superconductivity and Novel Magnetism, 2020, 33 (5), pp.1307-1316. ⟨10.1007/s10948-019-05393-1⟩
Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2020, 33 (5), pp.1307-1316. ⟨10.1007/s10948-019-05393-1⟩

A model, based on classical mechanics and thermodynamics and valid for \textit{all} superconductors, is devised to investigate the properties of the \textit{current-driven}, superconducting to normal transition. This process is shown to be reversible

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13f71900b5b2487f490b582321c9c1b5
https://hal.science/hal-02568151

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An observable prerequisite for the existence of persistent currents

Autor: Michel Abou Ghantous, Jacob Szeftel, Nicolas Sandeau

Publikováno v: The European Physical Journal B: Condensed Matter and Complex Systems
The European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2019, 92 (4), pp.67. ⟨10.1140/epjb/e2019-100033-8⟩
The European Physical Journal B: Condensed Matter and Complex Systems, 2019, 92 (4), pp.67. ⟨10.1140/epjb/e2019-100033-8⟩

A classical model is presented for persistent currents in superconductors. Their existence is argued to be warranted because their decay would violate the second law of thermodynamics. This conclusion is achieved by analyzing comparatively Ohm's law

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fec7548e863f6259ae3d7df96e5aeee
https://hal.archives-ouvertes.fr/hal-02085943/document

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Revisiting Low-Frequency Susceptibility Data in Superconducting Materials

Autor: Nicolas Sandeau, Michel Abou Ghantous, Jacob Szeftel

Publikováno v: Progress In Electromagnetics Research Letters
Progress In Electromagnetics Research Letters, 2019, 81, pp.1-8. ⟨10.2528/PIERL18100808⟩
Progress In Electromagnetics Research Letters, EMW Publishing, 2019, 81, pp.1-8. ⟨10.2528/PIERL18100808⟩

Old susceptibility data, measured in superconducting materials at low-frequency, are shown to be accounted for consistently within the framework of a recently published\cite{sz1} analysis of the skin effect. Their main merit is to emphasize the signi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c22a7236baa00d551bd31a56b86ae39
https://hal.science/hal-02053934

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Comparative Study of the Meissner and Skin Effects in Superconductors

Autor: Nicolas Sandeau, and Antoine Khater, Jacob Szeftel

Publikováno v: Progress In Electromagnetics Research M
Progress In Electromagnetics Research M, EMW Publishing, 2018, 69, pp.69-76. ⟨10.2528/PIERM18012805⟩
Progress In Electromagnetics Research M, 2018, 69, pp.69-76. ⟨10.2528/PIERM18012805⟩
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The Meissner effect is studied by using an approach based on Newton and Maxwell's equations. The objective is to assess the relevance of London's equation and shed light on the connection between the Meissner and skin effects. The properties of a sup

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04076239f0ee2f455c1bffe2b31d08d0
https://hal.archives-ouvertes.fr/hal-01866579

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