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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| Дата: | 2017 |
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| Автори: | , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2017
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| Назва видання: | Физика низких температур |
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| 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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irk-123456789-1746202021-01-27T01:25:57Z 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 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. 2017 Article 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 http://dspace.nbuv.gov.ua/handle/123456789/174620 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Low dimensionality and inhomogeneity effects in quantum matter Low dimensionality and inhomogeneity effects in quantum matter |
| spellingShingle |
Low dimensionality and inhomogeneity effects in quantum matter Low dimensionality and inhomogeneity effects in quantum matter Lotnyk, D. Onufriienko, O. Samuely, T. Shylenko, O. Komanický, V. Szabó, P. Feher, A. Samuely, P. Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM Физика низких температур |
| 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. |
| format |
Article |
| 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. |
| author_sort |
Lotnyk, D. |
| title |
Suppression of the superconductivity in ultrathin amorphous Mo₇₈Ge₂₂ films observed by STM |
| 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 |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2017 |
| topic_facet |
Low dimensionality and inhomogeneity effects in quantum matter |
| url |
http://dspace.nbuv.gov.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. |
| series |
Физика низких температур |
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