Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM
In contact with a superconductor a normal metal modifies its properties due to Andreev reflection. In the current work the local density of states (LDOS) of superconductor–normal metal Mo₇₈Ge₂₂–Au bilayers are studied by means of STM applied from the Au side. Three bilayers have been prepared on sil...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2017 |
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| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2017
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM / D. Lotnyk, O. Onufriienko, T. Samuely, O. Shylenko, V. Komanický, P. Szabó, A. Feher, P. Samuely // Физика низких температур. — 2017. — Т. 43, № 8. — С. 1146-1150. — Бібліогр.: 16 назв. — англ. |
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Lotnyk, D. Onufriienko, O. Samuely, T. Shylenko, O. Komanický, V. Szabó, P. Feher, A. Samuely, P. 2021-01-26T07:51:05Z 2021-01-26T07:51:05Z 2017 Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM / D. Lotnyk, O. Onufriienko, T. Samuely, O. Shylenko, V. Komanický, P. Szabó, A. Feher, P. Samuely // Физика низких температур. — 2017. — Т. 43, № 8. — С. 1146-1150. — Бібліогр.: 16 назв. — англ. 0132-6414 PACS: 74.45.+c, 74.78.–w, 74.81.Bd https://nasplib.isofts.kiev.ua/handle/123456789/174620 In contact with a superconductor a normal metal modifies its properties due to Andreev reflection. In the current work the local density of states (LDOS) of superconductor–normal metal Mo₇₈Ge₂₂–Au bilayers are studied by means of STM applied from the Au side. Three bilayers have been prepared on silicate glass substrate consisting of 100, 10 and 5 nm MoGe thin films covered always by 5 nm Au layer. The tunneling spectra were measured at temperatures from 0.5 to 7 K. The two-dimensional cross-correlation between topography and normalized zero-bias conductance indicates a proximity effect between 100 and 10 nm MoGe thin films and Au layer where a superconducting gap slightly smaller than that of bulk MoGe is observed. The effect of the thinnest 5 nm MoGe layer on Au leads to much smaller gap moreover the LDOS reveals almost completely suppressed coherence peaks. This is attributed to a strong pair-breaking effect of spin-flip processes at the interface between MoGe films and the substrate. This paper is dedicated to Professor Viktor Valentinovich Eremenko on the occasion of his 85th birthday. Authors (A.F. and P.S.) are very thankful to Prof. Eremenko for decades of fruitful collaboration. Viktor Valentinovich was and still is an excellent mentor in the field of magnetism for the whole Kosice Low Temperature Group. This work was supported by Project Nos. APVV-0605-14, VEGA 1/0409/15, Vega 2/0149/16 and U.S. Steel Košice. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Low dimensionality and inhomogeneity effects in quantum matter Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM |
| spellingShingle |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM Lotnyk, D. Onufriienko, O. Samuely, T. Shylenko, O. Komanický, V. Szabó, P. Feher, A. Samuely, P. Low dimensionality and inhomogeneity effects in quantum matter |
| title_short |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM |
| title_full |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM |
| title_fullStr |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM |
| title_full_unstemmed |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM |
| title_sort |
suppression of the superconductivity in ultrathin amorphous mo₇₈ge₂₂ films observed by stm |
| author |
Lotnyk, D. Onufriienko, O. Samuely, T. Shylenko, O. Komanický, V. Szabó, P. Feher, A. Samuely, P. |
| author_facet |
Lotnyk, D. Onufriienko, O. Samuely, T. Shylenko, O. Komanický, V. Szabó, P. Feher, A. Samuely, P. |
| topic |
Low dimensionality and inhomogeneity effects in quantum matter |
| topic_facet |
Low dimensionality and inhomogeneity effects in quantum matter |
| publishDate |
2017 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
In contact with a superconductor a normal metal modifies its properties due to Andreev reflection. In the current work the local density of states (LDOS) of superconductor–normal metal Mo₇₈Ge₂₂–Au bilayers are studied by means of STM applied from the Au side. Three bilayers have been prepared on silicate glass substrate consisting of 100, 10 and 5 nm MoGe thin films covered always by 5 nm Au layer. The tunneling spectra were measured at temperatures from 0.5 to 7 K. The two-dimensional cross-correlation between topography and normalized zero-bias conductance indicates a proximity effect between 100 and 10 nm MoGe thin films and Au layer where a superconducting gap slightly smaller than that of bulk MoGe is observed. The effect of the thinnest 5 nm MoGe layer on Au leads to much smaller gap moreover the LDOS reveals almost completely suppressed coherence peaks. This is attributed to a strong pair-breaking effect of spin-flip processes at the interface between MoGe films and the substrate.
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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/174620 |
| citation_txt |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM / D. Lotnyk, O. Onufriienko, T. Samuely, O. Shylenko, V. Komanický, P. Szabó, A. Feher, P. Samuely // Физика низких температур. — 2017. — Т. 43, № 8. — С. 1146-1150. — Бібліогр.: 16 назв. — англ. |
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