دورية أكاديمية
Strain-tunable triple point Fermions in diamagnetic rare-earth half-Heusler alloys.
| العنوان: | Strain-tunable triple point Fermions in diamagnetic rare-earth half-Heusler alloys. |
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| المؤلفون: | Bhattacharya A; Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India., Bhardwaj V; Department of Physics, Indian Institute of Technology Delhi, New Delhi, India., Mani BK; Department of Physics, Indian Institute of Technology Delhi, New Delhi, India. bkmani@physics.iitd.ac.in., Dutt JK; Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi, India., Chatterjee R; Department of Physics, Indian Institute of Technology Delhi, New Delhi, India. rmala@physics.iitd.ac.in. |
| المصدر: | Scientific reports [Sci Rep] 2021 Jun 08; Vol. 11 (1), pp. 12029. Date of Electronic Publication: 2021 Jun 08. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Original Publication: London : Nature Publishing Group, copyright 2011- |
| مستخلص: | Topologically non-trivial electronic structure is a feature of many rare-earth half-Heusler alloys, which host atoms with high spin-orbit coupling bringing in the non-triviality. In this article, using the first-principles simulations, rare-earth half-Heusler YPdBi, ScPdBi, LaPdBi, LuPdBi, YPtBi and LuPtBi alloys are studied under strain to reveal multiple band inversions associated with topological phase transitions. From our simulations we find that, as a result of first band-inversion, the Brillouin zone of the diamagnetic half-Heusler alloys hosts eight triple points whereas, the second band inversion causes the emergence of sixteen more triple points. These band-inversions are observed to be independent of the spin-orbit coupling and are the reason behind increasing occupation of bismuth 7s orbitals as volume of the unit cell increases. The surface electronic transport in different triple point semi-metallic phases is found to evolve under strain, as the number of Fermi arcs change due to multiple band inversions. Once the second band inversion occurs, further application of tensile strain does not increase the number of triple points and Fermi arcs. However, increasing tensile strain (or decreasing compressive strain) pushes the triple point crossing to higher momenta, making them more effective as source of highly mobile electrons. These observations make a pathway to tune the bulk as well as surface transport through these semi-metals by application of tensile or compressive strain depending on the unstrained relative band-inversion strength of the material. |
| التعليقات: | Erratum in: Sci Rep. 2021 Aug 4;11(1):16208. (PMID: 34349222) |
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| تواريخ الأحداث: | Date Created: 20210609 Latest Revision: 20231111 |
| رمز التحديث: | 20231215 |
| مُعرف محوري في PubMed: | PMC8187712 |
| DOI: | 10.1038/s41598-021-90850-y |
| PMID: | 34103556 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 2045-2322 |
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| DOI: | 10.1038/s41598-021-90850-y |