2018/05/31 by Peng-Lu Zhao, An Min Wang, An-Min Wang +1 · 1 citation
Physics and Astronomy · #Condensed matter physics #Dirac fermion #Electron #Fermi energy #Fermion #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Topological Materials and Phenomena #cond-mat.dis-nn #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.98.085150
published as Phys. Rev. B 98, 085150 (2018) · 9+9 pages,7 figures,published version
openalex created_date 2018/06/01 · openalex publication_date 2018/08/29 · arxiv created 2018/08/30 · arxiv updated 2018/08/31 · openalex updated_date 2026/08/05
We present a renormalization group analysis of the disorder effects on the low-energy behaviors of two-dimensional tilted Dirac-fermion systems, in which the fermions have two distinct orbitals unrelated by any symmetry. Four types of disordered potential, two interorbital and two intraorbital, are considered. If there is only one type of interorbital disorder, the fermion-disorder scattering induces logarithmic or power-law corrections to the fermion density of states and specific heat. In contrast, the intraorbital disorder can turn the system into a strongly disordered phase. In this disordered phase, calculations based on self-consistent Born approximation reveal that the Dirac point is destroyed and replaced by a bulk Fermi arc. We also study the interplay of four types of disorder, and find that the Dirac point can either remain intact or give place to a Fermi arc. We obtain the condition for the emergence of a Fermi arc in this case. Our results indicate that disorders can result in rich low-energy properties of tilted Dirac fermions.