Spin-orbital magnetic response of relativistic fermions with band hybridization

Abstract

Spins of relativistic fermions are related to their orbital degrees of freedom. In order to quantify the effect of hybridization between relativistic and nonrelativistic degrees of freedom on spin-orbit coupling, we focus on the spin-orbital (SO) crossed susceptibility arising from spin-orbit coupling. The SO crossed susceptibility is defined as the response function of their spin polarization to the "orbital" magnetic field, namely the effect of magnetic field on the orbital motion of particles as the vector potential. Once relativistic and nonrelativistic fermions are hybridized, their SO crossed susceptibility gets modified at the Fermi energy around the band hybridization point, leading to spin polarization of nonrelativistic fermions as well. These effects are enhanced under a dynamical magnetic field that violates thermal equilibrium, arising from the interband process permitted by the band hybridization. Its experimental realization is discussed for Dirac electrons in solids with slight breaking of crystalline symmetry or doping, and also for quark matter including dilute heavy quarks strongly hybridized with light quarks, arising in a relativistic heavy-ion collision process.

19 pages, 4 figures

References in corpus (28)

• The Chiral Magnetic Effect
• Dissipationless Quantum Spin Current at Room Temperature
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• Berry phase effect in anomalous thermoelectric transport
• Charge separation induced by P-odd bubbles in QCD matter
• Orbital magnetization in periodic insulators
• Quantum Anomalies in Dense Matter
• Chiral Magnetic conductivity
• Quantum Theory of Orbital Magnetization and its Generalization to Interacting Systems
• Orbital diamagnetism in multilayer graphenes: Systematic study with the effective mass approximation
• Single particle relaxation time versus transport scattering time in a 2D graphene layer
• Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd${}_2$As${}_2$
• Experimental searches for the chiral magnetic effect in heavy-ion collisions
• Chiral magnetic effect in two-band lattice model of Weyl semimetal
• Orbital magnetism of coupled bands models
• Magnetic textures and dynamics in magnetic Weyl semimetals
• Spin and Orbital Magnetic Response on the Surface of a Topological Insulator
• Streda-like formula in spin Hall effect
• Overscreened Kondo effect, (color) superconductivity and Shiba states in Dirac metals and quark matter
• Transport coefficients from QCD Kondo effect
• Kondo effect of ${\bar{D}}_s$ and ${\bar{D}}_s^{\ast }$ mesons in nuclear matter
• Interplay between chiral symmetry breaking and the QCD Kondo effect
• Emergent QCD Kondo effect in two-flavor color superconducting phase
• Universal Quantization of Magnetic Susceptibility Jump at Topological Phase Transition
• Chiral separation effect catalyzed by heavy impurities
• Two relativistic Kondo effects: Classification with particle and antiparticle impurities

Cited by in corpus (8)

• Spin accumulation without spin current
• Kondo effect with Wilson fermions
• Delineating chiral separation effect in two-color dense QCD
• Heavy-quark spin polarization induced by the Kondo effect in a magnetic field
• Dirac Kondo effect under magnetic catalysis
• Magneto-nonlinear Hall effect in time-reversal breaking system
• QCD Kondo effect for single heavy quark in chiral-symmetry broken phase
• Quantum theory of nonlinear electromagnetic response