Transport properties of the topological Kondo insulator SmB ₆ under the irradiation of light

Abstract

In this paper, we study transport properties of the X point in the Brillouin zone of the topological Kondo insulator SmB 6 under the application of a circularly polarized light. The transport properties at high-frequency regime and lowfrequency regime as a function of the ratio (κ) of the Dresselhaus-like and Rashba-like spin-orbit parameter are studied based on the Floquet theory and Boltzmann equation respectively. The sign of Hall conductivity at high-frequency regime can be reversed by the ratio κ and the amplitude of the light. The amplitude of the current can be enhanced by the ratio κ.Our findings provide a way to control the transport properties of the Dirac materials at low-frequency regime.

Spin-orbit coupling effects over thermoelectric transport properties in quantum dots

“…(ii) what is the role played by the leads dimensionality in the sizable increase of the figure of merit observed for 1D leads; (iii) the Rashba and Dresselhaus conduction band SOC results obtained here can be extended to study two-dimensional (2D) systems, like the surface states of the Kondo insulator SmB 6 . Some recent experimental results point out that a combination of Rashba-and Dresselhaus-like SOC [52][53][54][55] can describe the states around the X point of the Brillouin zone; (iv) finally, we would like to study the TE properties of an SET embedded in a 2D electron gas at the Persistent Spin Helix point (α = β) [81].…”

“…The strong correlation between localized 4f states and the conduction 5d band gives rise to a bulk insulating state at low temperatures while the surface remains metallic. Recent experimental results points out that the surface states around the X point of the Brillouin zone can be described by a combination of Rashbaand Dresselhaus-like SOC [52][53][54][55]. As mentioned above, in this work, the authors use the NRG method [15] to study in an unbiased manner the TE properties of a QD in the Kondo regime under the influence of SOC.…”

Magnetoresistance hysteresis in topological Kondo insulator SmB6 nanowire*

“…SmB 6 , a Kondo insulator that had been investigated for several decades, was recently predicted theoretically and confirmed experimentally to be a candidate of topological Kondo insulator. [1][2][3][4][5][6][7][8][9][10][11][12] In this strongly correlated system, the hybridization of 5f electrons and 4d electrons opens a bulk gap and the spin-momentum-locked topological surface state emerges. [13,14] The spin-texture of surface states has been observed by spin-resolved angle-resolved photoemission spectroscopy (SRARPES).…”