Report
ZrOsSi: A $Z_2$ topological metal with a superconducting ground state
| العنوان: | ZrOsSi: A $Z_2$ topological metal with a superconducting ground state |
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| المؤلفون: | Ghosh, S. K., Li, B., Xu, C., Hillier, A. D., Biswas, P. K., Xu, X., Shiroka, T. |
| المصدر: | Front. Phys. 11, 1256166 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The silicide superconductors (Ta, Nb, Zr)OsSi are among the best candidate materials for investigating the interplay of topological order and superconductivity. Here, we investigate in detail the normal-state topological properties of (Ta, Nb, Zr)OsSi, focusing on ZrOsSi, by employing a combination of $^{29}$Si nuclear magnetic resonance (NMR) measurements and first-principles band-structure calculations. We show that, while (Ta, Nb)OsSi behave as almost ideal metals, characterized by weak electronic correlations and a relatively low density of states, the replacement of Ta (or Nb) with Zr expands the crystal lattice and shifts ZrOsSi towards an insulator. Our ab initio calculations indicate that ZrOsSi is a $Z_2$ topological metal with clear surface Dirac cones and properties similar to a doped strong topological insulator. Comment: 15 pages, 9 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3389/fphy.2023.1256166 |
| URL الوصول: | http://arxiv.org/abs/2310.04105 |
| رقم الانضمام: | edsarx.2310.04105 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3389/fphy.2023.1256166 |
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