Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex
The iron-chalcogenide superconductor FeSe₁–xTex (0.5 < x < 1) was investigated by scanning-tunneling microscopy/
 spectroscopy (STM/STS) and break-junction techniques. In the STM topography of the samples, randomly
 distributed Te and Se surface atomic structure pattern...
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| Published in: | Физика низких температур |
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| Date: | 2013 |
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2013
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/118228 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex / T. Ekino, A. Sugimoto, A.M. Gabovich // Физика низких температур. — 2013. — Т. 39, № 3. — С. 343–353. — Бібліогр.: 50 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862549568980254720 |
|---|---|
| author | Ekino, T. Sugimoto, A. Gabovich, A.M. |
| author_facet | Ekino, T. Sugimoto, A. Gabovich, A.M. |
| citation_txt | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex / T. Ekino, A. Sugimoto, A.M. Gabovich // Физика низких температур. — 2013. — Т. 39, № 3. — С. 343–353. — Бібліогр.: 50 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | The iron-chalcogenide superconductor FeSe₁–xTex (0.5 < x < 1) was investigated by scanning-tunneling microscopy/
spectroscopy (STM/STS) and break-junction techniques. In the STM topography of the samples, randomly
distributed Te and Se surface atomic structure patterns correlate well with the bulk composition, demonstrating
that nanoscale surface features directly reflect bulk properties. The high-bias STS measurements
clarified the gap-like structure at ≈ 100–300 meV, which is consistent with the break-junction data. These highenergy
structures were also found in sulfur substituted FeS₀.₁Te₀.₉. Possible origin of such spectral peculiarities
is discussed. The superconducting gap 2Δ ≈ 3.4 ± 0.2 meV at temperature T = 4.2 K was found in the break junction
of FeSe₁–xTex with the critical temperature Tc ≈ 10 K. The corresponding characteristic gap to Tc ratio
2Δ/kBTc ≈ 4 ± 0.2 indicates moderate superconducting coupling (kB is the Boltzmann constant).
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| first_indexed | 2025-11-25T20:35:27Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-118228 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-25T20:35:27Z |
| publishDate | 2013 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Ekino, T. Sugimoto, A. Gabovich, A.M. 2017-05-29T13:17:38Z 2017-05-29T13:17:38Z 2013 Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex / T. Ekino, A. Sugimoto, A.M. Gabovich // Физика низких температур. — 2013. — Т. 39, № 3. — С. 343–353. — Бібліогр.: 50 назв. — англ. 0132-6414 PACS: 74.50.+r, 74.55.+v, 74.70.–b, 74.70.Xa https://nasplib.isofts.kiev.ua/handle/123456789/118228 The iron-chalcogenide superconductor FeSe₁–xTex (0.5 < x < 1) was investigated by scanning-tunneling microscopy/
 spectroscopy (STM/STS) and break-junction techniques. In the STM topography of the samples, randomly
 distributed Te and Se surface atomic structure patterns correlate well with the bulk composition, demonstrating
 that nanoscale surface features directly reflect bulk properties. The high-bias STS measurements
 clarified the gap-like structure at ≈ 100–300 meV, which is consistent with the break-junction data. These highenergy
 structures were also found in sulfur substituted FeS₀.₁Te₀.₉. Possible origin of such spectral peculiarities
 is discussed. The superconducting gap 2Δ ≈ 3.4 ± 0.2 meV at temperature T = 4.2 K was found in the break junction
 of FeSe₁–xTex with the critical temperature Tc ≈ 10 K. The corresponding characteristic gap to Tc ratio
 2Δ/kBTc ≈ 4 ± 0.2 indicates moderate superconducting coupling (kB is the Boltzmann constant). We thank the Natural Science Center for Basic Research
 and Development, Hiroshima University for EPMA analysis
 and supplying liquid helium. This work was supported by a Grand-in-Aid for Scientific Research (245403770) of the
 Ministry of Education, Culture, Sports, Science, and Technology
 (MEXT) of Japan. The work was partially supported
 by the Project N 8 of the 2012-2014 Scientific Cooperation
 Agreement between Poland and Ukraine. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 75-летию со дня рождения И. К. Янсона Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex Article published earlier |
| spellingShingle | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex Ekino, T. Sugimoto, A. Gabovich, A.M. К 75-летию со дня рождения И. К. Янсона |
| title | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex |
| title_full | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex |
| title_fullStr | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex |
| title_full_unstemmed | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex |
| title_short | Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex |
| title_sort | scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of fese₁–xtex |
| topic | К 75-летию со дня рождения И. К. Янсона |
| topic_facet | К 75-летию со дня рождения И. К. Янсона |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/118228 |
| work_keys_str_mv | AT ekinot scanningtunnelingmicroscopyspectroscopyandbreakjunctiontunnelingspectroscopyoffese1xtex AT sugimotoa scanningtunnelingmicroscopyspectroscopyandbreakjunctiontunnelingspectroscopyoffese1xtex AT gabovicham scanningtunnelingmicroscopyspectroscopyandbreakjunctiontunnelingspectroscopyoffese1xtex |