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 patterns correlate well with th...
Збережено в:
| Дата: | 2013 |
|---|---|
| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2013
|
| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/118228 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-118228 |
|---|---|
| record_format |
dspace |
| fulltext |
|
| spelling |
nasplib_isofts_kiev_ua-123456789-1182282025-02-09T10:34:54Z 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 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. 2013 Article 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 en Физика низких температур application/pdf 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 |
К 75-летию со дня рождения И. К. Янсона К 75-летию со дня рождения И. К. Янсона |
| spellingShingle |
К 75-летию со дня рождения И. К. Янсона К 75-летию со дня рождения И. К. Янсона Ekino, T. Sugimoto, A. Gabovich, A.M. Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe₁–xTex 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). |
| format |
Article |
| author |
Ekino, T. Sugimoto, A. Gabovich, A.M. |
| author_facet |
Ekino, T. Sugimoto, A. Gabovich, A.M. |
| author_sort |
Ekino, T. |
| title |
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_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_sort |
scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of fese₁–xtex |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2013 |
| topic_facet |
К 75-летию со дня рождения И. К. Янсона |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/118228 |
| 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. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT ekinot scanningtunnelingmicroscopyspectroscopyandbreakjunctiontunnelingspectroscopyoffese1xtex AT sugimotoa scanningtunnelingmicroscopyspectroscopyandbreakjunctiontunnelingspectroscopyoffese1xtex AT gabovicham scanningtunnelingmicroscopyspectroscopyandbreakjunctiontunnelingspectroscopyoffese1xtex |
| first_indexed |
2025-11-25T20:35:27Z |
| last_indexed |
2025-11-25T20:35:27Z |
| _version_ |
1849795991006347264 |