In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films
Abstract The structural and transport properties of vacancy‐ordered monoclinic superconducting titanium oxide (TiO) thin films grown by molecular beam epitaxy are investigated. The evolution of the crystal structure during growth is monitored by in situ synchrotron X‐ray diffraction. Long‐range orde...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2024-03-01
|
| Series: | Advanced Physics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/apxr.202300086 |
| _version_ | 1797270045978525696 |
|---|---|
| author | Merve Baksi Hawoong Hong Divine P. Kumah |
| author_facet | Merve Baksi Hawoong Hong Divine P. Kumah |
| author_sort | Merve Baksi |
| collection | DOAJ |
| description | Abstract The structural and transport properties of vacancy‐ordered monoclinic superconducting titanium oxide (TiO) thin films grown by molecular beam epitaxy are investigated. The evolution of the crystal structure during growth is monitored by in situ synchrotron X‐ray diffraction. Long‐range ordering of Ti and O vacancies in the disordered cubic phase stabilizes the vacancy‐ordered monoclinic TiO phase. The reduced structural disorder arising from vacancy‐ordering is correlated with a superconductor‐metal transition (SMT) in contrast to the superconductor‐insulator transition (SIT) observed in cubic TiO, orthorhombic Ti2O3, and the Magneli γ − Ti3O5 and γ − Ti4O7 phase. Magnetoresistance measurements for the SIT phases indicate superconducting fluctuations persisting in the normal phase. These results confirm the role of disorder related to Ti and O vacancies and structural inhomogeneity in determining the electronic properties of the normal state of titanium oxide‐based superconductors. |
| first_indexed | 2024-04-25T01:58:02Z |
| format | Article |
| id | doaj.art-f6a3035ea6f34b05b26f8e8cda8ac9df |
| institution | Directory Open Access Journal |
| issn | 2751-1200 |
| language | English |
| last_indexed | 2024-04-25T01:58:02Z |
| publishDate | 2024-03-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Physics Research |
| spelling | doaj.art-f6a3035ea6f34b05b26f8e8cda8ac9df2024-03-07T15:43:41ZengWiley-VCHAdvanced Physics Research2751-12002024-03-0133n/an/a10.1002/apxr.202300086In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin FilmsMerve Baksi0Hawoong Hong1Divine P. Kumah2Department of Physics North Carolina State University Raleigh NC 27695 USAAdvanced Photon Source Lemont IL 76019 USADepartment of Physics North Carolina State University Raleigh NC 27695 USAAbstract The structural and transport properties of vacancy‐ordered monoclinic superconducting titanium oxide (TiO) thin films grown by molecular beam epitaxy are investigated. The evolution of the crystal structure during growth is monitored by in situ synchrotron X‐ray diffraction. Long‐range ordering of Ti and O vacancies in the disordered cubic phase stabilizes the vacancy‐ordered monoclinic TiO phase. The reduced structural disorder arising from vacancy‐ordering is correlated with a superconductor‐metal transition (SMT) in contrast to the superconductor‐insulator transition (SIT) observed in cubic TiO, orthorhombic Ti2O3, and the Magneli γ − Ti3O5 and γ − Ti4O7 phase. Magnetoresistance measurements for the SIT phases indicate superconducting fluctuations persisting in the normal phase. These results confirm the role of disorder related to Ti and O vacancies and structural inhomogeneity in determining the electronic properties of the normal state of titanium oxide‐based superconductors.https://doi.org/10.1002/apxr.202300086molecular beam epitaxysuperconductivitysynchrotron diffractiontitanium oxide |
| spellingShingle | Merve Baksi Hawoong Hong Divine P. Kumah In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films Advanced Physics Research molecular beam epitaxy superconductivity synchrotron diffraction titanium oxide |
| title | In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films |
| title_full | In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films |
| title_fullStr | In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films |
| title_full_unstemmed | In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films |
| title_short | In Situ Scattering Studies of Superconducting Vacancy‐Ordered Monoclinic TiO Thin Films |
| title_sort | in situ scattering studies of superconducting vacancy ordered monoclinic tio thin films |
| topic | molecular beam epitaxy superconductivity synchrotron diffraction titanium oxide |
| url | https://doi.org/10.1002/apxr.202300086 |
| work_keys_str_mv | AT mervebaksi insituscatteringstudiesofsuperconductingvacancyorderedmonoclinictiothinfilms AT hawoonghong insituscatteringstudiesofsuperconductingvacancyorderedmonoclinictiothinfilms AT divinepkumah insituscatteringstudiesofsuperconductingvacancyorderedmonoclinictiothinfilms |