Inverse-perovskites A3BO (A = Sr, Ca, Eu/B = Pb, Sn): A platform for control of Dirac and Weyl Fermions
| Autor: | S. Suetsugu, Juergen Nuss, Kentaro Kitagawa, A. W. Rost, H. Takagi, Jan A. N. Bruin, Vahideh Abdolazimi, J. H. Kim, Claus Mühle, K. Hayama, Alexander Yaresko |
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| Přispěvatelé: | EPSRC, University of St Andrews. Centre for Designer Quantum Materials, University of St Andrews. School of Physics and Astronomy |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Current (mathematics) Magnetism TK lcsh:Biotechnology Dirac (software) NDAS Correlated Electron Systems 02 engineering and technology Correlated Electron Systems / High Field Magnet Laboratory (HFML) 01 natural sciences TK Electrical engineering. Electronics Nuclear engineering lcsh:TP248.13-248.65 0103 physical sciences Dispersion (optics) General Materials Science Anisotropy QC Surface states 010302 applied physics Condensed matter physics General Engineering Fermi energy Fermion 021001 nanoscience & nanotechnology lcsh:QC1-999 QC Physics 0210 nano-technology lcsh:Physics |
| Zdroj: | APL Materials, Vol 7, Iss 12, Pp 121114-121114-7 (2019) Apl Materials, 7, 12 Apl Materials, 7 |
| ISSN: | 2166-532X |
| Popis: | Bulk Dirac electron systems have attracted strong interest for their unique magnetoelectric properties as well as their close relation to topological (crystalline) insulators. Recently, the focus has been shifting toward the role of magnetism in stabilizing Weyl fermions as well as chiral surface states in such materials. While a number of nonmagnetic systems are well known, experimental realizations of magnetic analogs are a key focus of current studies. Here, we report on the physical properties of a large family of inverse perovskites A3BO (A = Sr, Ca, Eu/B = Pb, Sn) in which we are able to not only stabilize 3D Dirac electrons at the Fermi energy but also chemically control their properties. In particular, it is possible to introduce a controllable Dirac gap, change the Fermi velocity, tune the anisotropy of the Dirac dispersion, and—crucially—introduce complex magnetism into the system. This family of compounds therefore opens up unique possibilities for the chemical control and systematic investigation of the fascinating properties of such topological semimetals.Bulk Dirac electron systems have attracted strong interest for their unique magnetoelectric properties as well as their close relation to topological (crystalline) insulators. Recently, the focus has been shifting toward the role of magnetism in stabilizing Weyl fermions as well as chiral surface states in such materials. While a number of nonmagnetic systems are well known, experimental realizations of magnetic analogs are a key focus of current studies. Here, we report on the physical properties of a large family of inverse perovskites A3BO (A = Sr, Ca, Eu/B = Pb, Sn) in which we are able to not only stabilize 3D Dirac electrons at the Fermi energy but also chemically control their properties. In particular, it is possible to introduce a controllable Dirac gap, change the Fermi velocity, tune the anisotropy of the Dirac dispersion, and—crucially—introduce complex magnetism into the system. This family of compounds therefore opens up unique possibilities for the chemical control and systematic investigat... |
| Databáze: | OpenAIRE |
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