Thermal difference reflectivity of tilted 2D Dirac materials

Abstract

Deviation from perfect conical dispersion in Dirac materials, such as the presence of mass or tilting, enhances control and directionality of electronic transport. To identify these signatures, we analyze the thermal derivative spectra of optical reflectivity in doped massive tilted Dirac systems. The density of states and chemical potential are determined as preliminary steps to calculate the optical conductivity tensor at finite temperature using thermal convolution. Changes in reflection caused by temperature variations enable clear identification of critical frequencies in the optical response. By measuring these spectral features in the thermoderivative spectrum, energy gaps and band structure tilting can be determined. A comparison is presented between the spectra of various low-energy Dirac Hamiltonians. Our findings suggest that thermal difference spectroscopy holds promise as a valuable technique for probing interband transitions of 2D Dirac fermions

References in corpus (11)

• Band signatures for strong nonlinear Hall effect in bilayer WTe${}_2$
• Micro-reflectance and transmittance spectroscopy: a versatile and powerful tool to characterize 2D materials
• Observation of an anisotropic Dirac cone reshaping and ferrimagnetic spin polarization in an organic conductor
• Effect of electron-hole asymmetry on optical conductivity in 8-Pmmn borophene
• The Optical Properties and Plasmonics of Anisotropic 2-Dimensional Materials
• Optical properties of massive anisotropic tilted Dirac systems
• Probing quantum criticality using nonlinear Hall effect in a metallic Dirac system
• Anisotropic longitudinal optical conductivities of tilted Dirac bands in 1T${}^{\prime }$-MoS${}_2$
• Synthetic non-Abelian gauge fields and gravitomagnetic effects in tilted Dirac cone systems
• 2D Ladder polyborane: an ideal Dirac semimetal with a multi-feld-tunable band gap
• Experimental Confirmation of Massive Dirac Fermions in Weak Charge-Ordering State in α-(BEDT-TTF)_2I_3

Cited by in corpus (1)

• Non-trivial phonon dynamics and significant electron-phonon coupling of the high frequency modes in a Dirac semimetal