2017/03/31 by Nitesh Kumar, Chandra Shekhar, Johannes Klotz +3
Chemistry · Materials Science · Physics and Astronomy · #2D Materials and Applications #Anisotropy #Band gap #Bismuth #Chemistry #Condensed matter physics #Electron #Electronic and Structural Properties of Oxides #Magnetic field #Magnetoresistance #Materials science #Optics #Physics #Polarization (electrochemistry) #Quantum mechanics #Semimetal #Topological Materials and Phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.96.161103
published as Phys. Rev. B 96, 161103(R) 2017 · 5 figures
arxiv created 2017/10/03 · openalex publication_date 2017/10/03 · arxiv updated 2017/10/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
LaBi is a three-dimensional rocksalt-type material with a surprisingly quasi-two-dimensional electronic structure. It exhibits excellent electronic properties such as the existence of nontrivial Dirac cones, extremely large magnetoresistance, and high charge-carrier mobility. The cigar-shaped electron valleys make the charge transport highly anisotropic when the magnetic field is varied from one crystallographic axis to another. We show that the electrons can be polarized effectively in these electron valleys under a rotating magnetic field. We achieved a polarization of 60% at 2 K despite the coexistence of three-dimensional hole pockets. The valley polarization in LaBi is compared to the sister compound LaSb where it is found to be smaller. The performance of LaBi is comparable to the highly efficient bismuth.