2016/10/31 by Alberto Cortijo · 4 citations
Chemistry · Engineering · Physics and Astronomy · #Band bending #Band gap #Chemistry #Condensed matter physics #Dirac (video compression format) #Magnetic field #Nonlinear system #Observable #Physics #Point reflection #Polarization (electrochemistry) #Quantum Mechanics and Non-Hermitian Physics #Quantum electrodynamics #Quantum mechanics #Second-harmonic generation #Semimetal #Terahertz technology and applications #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.94.235123
published as Phys. Rev. B 94, 235123 (2016) · Expanded version with new results added
arxiv created 2016/11/14 · openalex publication_date 2016/12/08 · arxiv updated 2016/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that under the effect of an external magnetic field, a photogalvanic effect and the generation of a second harmonic wave can be induced in inversion symmetric and time-reversal invariant Dirac semimetals and it is linear with the magnetic field. The mechanisms responsible for these nonlinear optical responses are the magnetochiral effect and the chiral magnetic effect. What makes possible that these two effects give rise to the discussed nonlinear optical effects is the presence of band bending effects in the dispersion relation in real Dirac semimetals. Some observable consequences of this phenomenon are the appearance of a dc current on the surface of the system when it is irradiated with linearly polarized light or a rotation of the polarization plane of the reflected second harmonic wave.