Сверхпроводимость, БКШ, успехи, странности и непонятности

Модераторы: morozov, mike@in-russia, Editor

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Re: ВТСП. Тема не сдохла, но затихла

Номер сообщения:#91   FENIMUS » Чт дек 20, 2018 10:24

Гидрид лантана сверхпроводимый при -23 С и давлении 150 ГПа.

https://www.dailytechinfo.org/news/1044 ... mosti.html

Тема поднималась пользователем morozov Чт дек 20, 2018 10:24.

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Re: Сверхпроводимость, БКШ, успехи, странности и непонятности

Номер сообщения:#92   morozov » Чт дек 20, 2018 16:26

Magnetic-Field-Induced Superconductivity in Ultrathin Pb Films with Magnetic Impurities
Masato Niwata, Ryuichi Masutomi, Tohru Okamoto
(Submitted on 23 Oct 2017)

It is well known that external magnetic fields and magnetic moments of impurities both suppress superconductivity. Here, we demonstrate that their combined effect enhances the superconductivity of a few atomic layer thick Pb films grown on a cleaved GaAs(110) surface. A Ce-doped film, where superconductivity is totally suppressed at zero-field, actually turns superconducting when an external magnetic field is applied parallel to the conducting plane. For films with Mn adatoms, the screening of the magnetic moment by conduction electrons, i.e., the Kondo singlet formation, becomes important. We found that the degree of screening can be reduced by capping the Pb film with a Au layer, and observed the positive magnetic field dependence of the superconducting transition temperature.

Comments: 5 pages, 3 figures, submitted to PRL
Subjects: Superconductivity (cond-mat.supr-con)
Cite as: arXiv:1710.08210 [cond-mat.supr-con]
(or arXiv:1710.08210v1 [cond-mat.supr-con] for this version)

С уважением, Морозов Валерий Борисович


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