| Autor: |
Mazzola F; Istituto Officina dei Materiali (IOM)-CNR, Laboratorio TASC, Area Science Park, S.S.14, km 163.5, I-34149 Trieste, Italy.; Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, I-30172 Venice, Italy., Zhang Y; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China., Olszowska N; National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Czerwone Maki 98, PL-30392 Kraków, Poland., Rosmus M; National Synchrotron Radiation Centre SOLARIS, Jagiellonian University, Czerwone Maki 98, PL-30392 Kraków, Poland., D'Olimpio G; Department of Physical and Chemical Sciences, University of L'Aquila, via Vetoio, I-67100 L'Aquila (AQ), Italy., Istrate MC; National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania., Politano GG; Department of Information Engineering, Infrastructures and Sustainable Energy (DIIES), University 'Mediterranea' of Reggio Calabria, Loc. Feo di Vito, I-89122 Reggio Calabria, Italy., Vobornik I; Istituto Officina dei Materiali (IOM)-CNR, Laboratorio TASC, Area Science Park, S.S.14, km 163.5, I-34149 Trieste, Italy., Sankar R; Institute of Physics, Academia Sinica Nankang, Taipei 11529, Taiwan., Ghica C; National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania., Gao J; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China., Politano A; Department of Physical and Chemical Sciences, University of L'Aquila, via Vetoio, I-67100 L'Aquila (AQ), Italy. |
| Abstrakt: |
Nonmagnetic chiral crystals are a new class of systems hosting Kramers-Weyl Fermions, arising from the combination of structural chirality, spin-orbit coupling (SOC), and time-reversal symmetry. These materials exhibit nontrivial Fermi surfaces with SOC-induced Chern gaps over a wide energy range, leading to exotic transport and optical properties. In this study, we investigate the electronic structure and transport properties of CdAs 2 , a newly reported chiral material. We use synchrotron-based angle-resolved photoelectron spectroscopy (ARPES) and density functional theory (DFT) to determine the Fermiology of the (110)-terminated CdAs 2 crystal. Our results, together with complementary magnetotransport measurements, suggest that CdAs 2 is a promising candidate for novel topological properties protected by the structural chirality of the system. Our work sheds light on the details of the Fermi surface and topology for this chiral quantum material, providing useful information for engineering novel spintronic and optical devices based on quantized chiral charges, negative longitudinal magnetoresistance, and nontrivial Chern numbers. |
