Dynamical conductivity of lithium-intercalated hexagonal boron nitride films: A memory function approach

Rukelj, Zoran

doi:10.1103/physrevb.102.205108

Cited by 7 publications

(5 citation statements)

References 50 publications

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“…In the high energy limit ω F ≫ ω t , the bands (2.2) are free-electron-like with the effective mass m * . In this limit we recover a well known property n αα /n = m e /m * [24].…”

Section: B Effective Charge Carrier Concentration Nααsupporting

confidence: 71%

Carrier concentrations and optical conductivity of a band-inverted semimetal in two and three dimensions

Rukelj,

Akrap

2021

Preprint

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Here we study the single-particle, electronic transport and optical properties of a gapped system described by a simple two-band Hamiltonian with inverted valence bands. We analyze its properties in the three-dimensional (3D) and the two-dimensional (2D) case. The insulating phase changes into a metallic phase when the band gap is set to zero. The metallic phase in the 3D case is characterized by a nodal surface. This nodal surface is equivalent to a nodal ring in two dimensions. Within a simple theoretical framework, we calculate the density of state, the total and effective charge carrier concentration, the Hall concentration and the Hall coefficient, for both 2D and 3D cases. The main result is that the three concentrations always differ from one another in the present model. These concentrations can then be used to resolve the nature of the electronic ground state. Similarly, the optical conductivity is calculated and discussed for the insulating phase. We show that there are no optical excitations in the metallic phase. Finally, we compare the calculated optical conductivity with the rule-of-thumb derivation using the joint density of states.

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“…In the high energy limit ω F ≫ ω t , the bands (2.2) are free-electron-like with the effective mass m * . In this limit we recover a well known property n αα /n = m e /m * [24].…”

Section: B Effective Charge Carrier Concentration Nααsupporting

confidence: 71%

Carrier concentrations and optical conductivity of a band-inverted semimetal in two and three dimensions

Rukelj,

Akrap

2021

Preprint

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“…The connection with the experiment here is simple since the Drude weight is measured in the reflectivity experiments (plasma edge). In a free electron-like system this concentration is trivially related with the total concentration of electrons [7], but in the system described by more 'exotic' bands like equation (2.6), the two may differ significantly as seen in graphene for example [14]. Finally, the Seebeck coefficient or thermoelectric power S α is calculated in the T = 0 limit using the Mott formula.…”

Section: Carrier Concentrations and Low-t Thermopowermentioning

confidence: 99%

“…In the 2D case the recently proposed layered heterostructure LiBN [4][5][6][7] has a single parabolic conduction band. The effective mass, the Fermi energy E F and correspondingly Fermi wave vector k F depend on the type of the alkali metal and on its concentration relative to the underlying BN hexagonal net.…”

Section: Introductionmentioning

confidence: 99%

DC and optical signatures of the reconstructed Fermi surface for electrons with parabolic band

Rukelj

Radić

2022

New J. Phys.

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We study the main intra-band and inter-band transport properties at zero temperature of free electron-like system undergoing a topological reconstruction of the Fermi surface for the two-dimensional and three-dimensional case. The calculated intra-band properties include the single-particle density of states, the total and the effective concentrations of electrons and the thermopower. As for the inter-band case, the real part of the conductivity has been calculated within the vanishing inter-band relaxation approximation as a function of the incident photon energy. Within this approach, it is shown that the optical conductivity has a nonvanishing component parallel to the reconstruction wave vector and the shape which depends on the value of the Fermi energy. Each dimensionality has its particular features in the transport quantities presented in the paper, which are discussed and compared with those in the free electron scenario. Finally, we identify the signature of the topological reconstruction of the Fermi surface in the intra-band and inter-band transport functions.

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“…The connection with the experiment here is simple since the Drude weight is measured in the reflectivity experiments (plasma edge). In a free electron-like system this concentration is trivially related with the total concentration of electrons [7], but in the system described by more "exotic" bands like Eq. (2.6), the two may differ significantly as seen in graphene for example [14].…”

Section: Carrier Concentrations and Low-t Thermopowermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DC and optical signatures of the topological reconstruction of the Fermi surface for electrons with parabolic band dispersion

Rukelj,

Radić

2021

Preprint

Self Cite

View full text Add to dashboard Cite

We study the main intra-band and inter-band transport properties at zero temperature of free electron-like system undergoing a topological reconstruction of the Fermi surface for the twodimensional and three-dimensional case. The calculated intra-band properties include the singleparticle density of states, the total and the effective concentrations of electrons and the thermopower. As for the inter-band case, the real part of the conductivity has been calculated within the vanishing inter-band relaxation approximation as a function of the incident photon energy. Within this approach, it is shown that the optical conductivity has a nonvanishing component parallel to the reconstruction wave vector and the shape which depends on the value of the Fermi energy. Each dimensionality has its particular features in the transport quantities presented in the paper, which are discussed and compared with those in the free electron scenario. Finally, we identify the signature of the topological reconstruction of the Fermi surface in the intra-band and inter-band transport functions.

show abstract

Dynamical conductivity of lithium-intercalated hexagonal boron nitride films: A memory function approach

Cited by 7 publications

References 50 publications

Carrier concentrations and optical conductivity of a band-inverted semimetal in two and three dimensions

Carrier concentrations and optical conductivity of a band-inverted semimetal in two and three dimensions

DC and optical signatures of the reconstructed Fermi surface for electrons with parabolic band

DC and optical signatures of the topological reconstruction of the Fermi surface for electrons with parabolic band dispersion

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