Academic Journal
Why scanning tunneling spectroscopy of Sr2RuO4 sometimes doesn’t see the superconducting gap
| العنوان: | Why scanning tunneling spectroscopy of Sr2RuO4 sometimes doesn’t see the superconducting gap |
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| المؤلفون: | Adrian Valadkhani, Jonas B. Profe, Andreas Kreisel, P. J. Hirschfeld, Roser Valentí |
| المصدر: | npj Quantum Materials, Vol 9, Iss 1, Pp 1-7 (2024) |
| بيانات النشر: | Nature Portfolio, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Atomic physics. Constitution and properties of matter |
| مصطلحات موضوعية: | Materials of engineering and construction. Mechanics of materials, TA401-492, Atomic physics. Constitution and properties of matter, QC170-197 |
| الوصف: | Abstract Scanning tunneling spectroscopy (STS) and scanning tunneling microscopy (STM) are perhaps the most promising ways to detect the superconducting gap size and structure in the canonical unconventional superconductor Sr2RuO4 directly. However, in many cases, researchers have reported being unable to detect the gap at all in STM conductance measurements. Recently, an investigation of this issue on various local topographic structures on a Sr-terminated surface found that superconducting spectra appeared only in the region of small nanoscale canyons, corresponding to the removal of one RuO surface layer. Here, we analyze the electronic structure of various possible surface structures using first principles methods, and argue that bulk conditions favorable for superconductivity can be achieved when removal of the RuO layer suppresses the RuO4 octahedral rotation locally. We further propose alternative terminations to the most frequently reported Sr termination where superconductivity surfaces should be observed. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2397-4648 |
| Relation: | https://doaj.org/toc/2397-4648 |
| DOI: | 10.1038/s41535-024-00687-7 |
| URL الوصول: | https://doaj.org/article/37b80afa72a5482893e370ebb7e7b3f0 |
| رقم الانضمام: | edsdoj.37b80afa72a5482893e370ebb7e7b3f0 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 23974648 |
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| DOI: | 10.1038/s41535-024-00687-7 |