Superconductivity at epitaxial LaTiO3–KTaO3 interfaces
The design of epitaxial interfaces is a pivotal way to engineer artificial structures where new electronic phases can emerge. Here, we report a systematic emergence of an interfacial superconducting state in epitaxial heterostructures of LaTiO3 and KTaO3. The superconductivity transition temperature...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-06-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0151227 |
| _version_ | 1797771748691673088 |
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| author | D. Maryenko I. V. Maznichenko S. Ostanin M. Kawamura K. S. Takahashi M. Nakamura V. K. Dugaev E. Ya. Sherman A. Ernst M. Kawasaki |
| author_facet | D. Maryenko I. V. Maznichenko S. Ostanin M. Kawamura K. S. Takahashi M. Nakamura V. K. Dugaev E. Ya. Sherman A. Ernst M. Kawasaki |
| author_sort | D. Maryenko |
| collection | DOAJ |
| description | The design of epitaxial interfaces is a pivotal way to engineer artificial structures where new electronic phases can emerge. Here, we report a systematic emergence of an interfacial superconducting state in epitaxial heterostructures of LaTiO3 and KTaO3. The superconductivity transition temperature increases with decreasing thickness of LaTiO3. Such a behavior is observed for both (110) and (111) crystal oriented structures. For thick samples, the finite resistance developing below the superconducting transition temperature increases with increasing LaTiO3 thickness. Consistent with previous reports, the (001) oriented heterointerface features a high electron mobility of 250 cm2 V−1 s−1 and shows no superconducting transition down to 40 mK. Our results imply a non-trivial impact of LaTiO3 on the superconducting state and indicate how superconducting KTaO3 interfaces can be integrated with other oxide materials. |
| first_indexed | 2024-03-12T21:42:06Z |
| format | Article |
| id | doaj.art-2b56b1ef7d3a4e7390704461a5777ecc |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-03-12T21:42:06Z |
| publishDate | 2023-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-2b56b1ef7d3a4e7390704461a5777ecc2023-07-26T16:22:28ZengAIP Publishing LLCAPL Materials2166-532X2023-06-01116061102061102-710.1063/5.0151227Superconductivity at epitaxial LaTiO3–KTaO3 interfacesD. Maryenko0I. V. Maznichenko1S. Ostanin2M. Kawamura3K. S. Takahashi4M. Nakamura5V. K. Dugaev6E. Ya. Sherman7A. Ernst8M. Kawasaki9RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, JapanInstitute of Physics, Martin Luther University Halle-Wittenberg, 06120 Halle, GermanyInstitute of Physics, Martin Luther University Halle-Wittenberg, 06120 Halle, GermanyRIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, JapanRIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, JapanRIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, JapanDepartment of Physics and Medical Engineering, Rzeszów University of Technology, 35-959 Rzeszów, PolandDepartment of Physical Chemistry and EHU Quantum Center, University of the Basque Country, 48940 Leioa, SpainInstitute for Theoretical Physics, Johannes Kepler University, 4040 Linz, AustriaRIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, JapanThe design of epitaxial interfaces is a pivotal way to engineer artificial structures where new electronic phases can emerge. Here, we report a systematic emergence of an interfacial superconducting state in epitaxial heterostructures of LaTiO3 and KTaO3. The superconductivity transition temperature increases with decreasing thickness of LaTiO3. Such a behavior is observed for both (110) and (111) crystal oriented structures. For thick samples, the finite resistance developing below the superconducting transition temperature increases with increasing LaTiO3 thickness. Consistent with previous reports, the (001) oriented heterointerface features a high electron mobility of 250 cm2 V−1 s−1 and shows no superconducting transition down to 40 mK. Our results imply a non-trivial impact of LaTiO3 on the superconducting state and indicate how superconducting KTaO3 interfaces can be integrated with other oxide materials.http://dx.doi.org/10.1063/5.0151227 |
| spellingShingle | D. Maryenko I. V. Maznichenko S. Ostanin M. Kawamura K. S. Takahashi M. Nakamura V. K. Dugaev E. Ya. Sherman A. Ernst M. Kawasaki Superconductivity at epitaxial LaTiO3–KTaO3 interfaces APL Materials |
| title | Superconductivity at epitaxial LaTiO3–KTaO3 interfaces |
| title_full | Superconductivity at epitaxial LaTiO3–KTaO3 interfaces |
| title_fullStr | Superconductivity at epitaxial LaTiO3–KTaO3 interfaces |
| title_full_unstemmed | Superconductivity at epitaxial LaTiO3–KTaO3 interfaces |
| title_short | Superconductivity at epitaxial LaTiO3–KTaO3 interfaces |
| title_sort | superconductivity at epitaxial latio3 ktao3 interfaces |
| url | http://dx.doi.org/10.1063/5.0151227 |
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