Reflection spectra of two polymorphic modifications of cadmium arsenide

Kozlov, A. I.; Соболев, В. В.; Knjazev, A. F.

doi:10.1134/1.1882787

Cited by 1 publication

(2 citation statements)

References 13 publications

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“…Namely, we used: (i) the polycrystalline data from Ref. [25]; (ii) the single-crystal data from the same reference; and (iii) the most recent single-crystal data from Kozlov et al [26]. All these data sets, as well as the data of Ref.…”

Section: Kramers-kronig Analysismentioning

confidence: 99%

“…Turner et al [16] identify a very narrow (130 meV) optical gap in the optical absorption. Another group of papers [22][23][24][25][26] mainly discusses absorption features at energies of a few electron volts and their relations to transitions between different (high-energy) parabolic bands. No optical conductivity was derived from these measurements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interband optical conductivity of the [001]-oriented Dirac semimetalCd3As2

Neubauer¹,

Ćarbotte²,

Nateprov³

et al. 2016

Phys. Rev. B

116

101

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We measured the optical reflectivity of [001]-oriented n-doped Cd3As2 in a broad frequency range (50 -22 000 cm −1 ) for temperatures from 10 to 300 K. The optical conductivity, σ(ω) = σ1(ω) + iσ2(ω), is isotropic within the (001) plane; its real part follows a power law, σ1(ω) ∝ ω 1.65 , in a large interval from 2000 to 8000 cm −1 . This behavior is caused by interband transitions between two Dirac bands, which are effectively described by a sublinear dispersion relation, E(k) ∝ |k| 0.6 . The momentum-averaged Fermi velocity of the carriers in these bands is energy dependent and ranges from 1.2 × 10 5 to 3 × 10 5 m/s, depending on the distance from the Dirac points. We detect a gaplike feature in σ1(ω) and associate it with the Fermi level positioned around 100 meV above the Dirac points.

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Section: Kramers-kronig Analysismentioning

confidence: 99%