KFU. Card publication. Synthesis of Thin Niobium Films on Silicon and Study of Their Superconducting Properties in the Dimensional Crossover Region

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SYNTHESIS OF THIN NIOBIUM FILMS ON SILICON AND STUDY OF THEIR SUPERCONDUCTING PROPERTIES IN THE DIMENSIONAL CROSSOVER REGION

Form of presentation

Articles in international journals and collections

Year of publication

2021

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Authors, employees of KFU

Gumarov Amir Ildusovich, author

Rogov Aleksey Mikhaylovich, author

Tagirov Lenar Rafgatovich, author

Yusupov Roman Valerevich, author

Yanilkin Igor Vitalevich, author

Bibliographic description in the original language

Synthesis of thin niobium films on silicon and study of their superconducting properties in the dimensional crossover region / I.V. Yanilkin, A.I. Gumarov, A.M. Rogov, R.V. Yusupov, L.R. Tagirov // Technical Physics. – 2021. – V.66,N2. – P.263–268. DOI: 10.1134/S1063784221020249

Annotation

Niobium films with a thickness of 4—100 nm are synthesized on a silicon substrate under ultrahigh vacuum conditions. Measurements of the electrical resistance show a high superconducting transition temperature Tc in the range of 4.7—9.1 � and record-breaking small transition widths ATC in the range of 260— 11 mK. The dependences of Tc and ATC on the magnetic field are investigated, and the superconducting coherence lengths and mean free paths of conduction electrons for different thicknesses of the synthesized films are determined. A significant influence of the magnetic field on ATC is found, which reveals the transition from three- to two-dimensional superconductivity at thicknesses below 10 nm. The dependences of Tc and t?Tc on the thickness of the films and the magnitude of the magnetic field are discussed within the framework of existing theories of superconductivity in thin films of superconducting metals.

Keywords

niobium films, superconductivity

The name of the journal

Technical Physics

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101886809&doi=10.1134%2fS1063784221020249&partnerID=40&md5=405fd5fb963ab74c3c0dcc6644186a1f

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=251402&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Gumarov Amir Ildusovich	ru_RU
dc.contributor.author	Rogov Aleksey Mikhaylovich	ru_RU
dc.contributor.author	Tagirov Lenar Rafgatovich	ru_RU
dc.contributor.author	Yusupov Roman Valerevich	ru_RU
dc.contributor.author	Yanilkin Igor Vitalevich	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	Synthesis of thin niobium films on silicon and study of their superconducting properties in the dimensional crossover region / I.V. Yanilkin, A.I. Gumarov, A.M. Rogov, R.V. Yusupov, L.R. Tagirov // Technical Physics. – 2021. – V.66,N2. – P.263–268. DOI: 10.1134/S1063784221020249	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=251402&p_lang=2	ru_RU
dc.description.abstract	Technical Physics	ru_RU
dc.description.abstract	Niobium films with a thickness of 4—100 nm are synthesized on a silicon substrate under ultrahigh vacuum conditions. Measurements of the electrical resistance show a high superconducting transition temperature Tc in the range of 4.7—9.1 � and record-breaking small transition widths ATC in the range of 260— 11 mK. The dependences of Tc and ATC on the magnetic field are investigated, and the superconducting coherence lengths and mean free paths of conduction electrons for different thicknesses of the synthesized films are determined. A significant influence of the magnetic field on ATC is found, which reveals the transition from three- to two-dimensional superconductivity at thicknesses below 10 nm. The dependences of Tc and t?Tc on the thickness of the films and the magnitude of the magnetic field are discussed within the framework of existing theories of superconductivity in thin films of superconducting metals.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	niobium films	ru_RU
dc.subject	superconductivity	ru_RU
dc.title	Synthesis of Thin Niobium Films on Silicon and Study of Their Superconducting Properties in the Dimensional Crossover Region	ru_RU
dc.type	Articles in international journals and collections	ru_RU