Study of the yellow emission of natural α-HgS

Massé, G.; Aicardi, J.P.; Leyris, J.P.

doi:10.1016/0022-2313(78)90024-8

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…Cinnabar is transparent in the red and has an optical gap of ∼2.275 eV. 14 We shall not discuss it here any further since we confine ourselves to the chalcogenides with zincblende structure. It will be discussed in a later publication.…”

Section: Introductionmentioning

confidence: 99%

Electronic, vibrational, and thermodynamic properties of metacinnabarβ-HgS, HgSe, and HgTe

et al. 2009

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We report ab initio calculations of the electronic band structure and the phonon dispersion relations of the zincblende-type mercury chalcogenides ͑␤-HgS, HgSe, and HgTe͒. The latter have been used to evaluate the temperature dependence of the specific heat, which has been compared with experimental data. The electronic band structure of these materials has been confirmed to have an inverted direct gap of the ␣-tin type, which makes HgSe and HgTe semimetallic. For ␤-HgS, however, our calculations predict a negative spin-orbit splitting that restores semiconducting properties to the material in spite of the inverted gap. We have calculated the spin-orbit induced linear terms in k, which appear at the ⌫ 8 valence bands. We have also investigated the pressure dependence of the crystal structure and the phonons.

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Section: Introductionmentioning

confidence: 99%

Electronic, vibrational, and thermodynamic properties of metacinnabarβ-HgS, HgSe, and HgTe

et al. 2009

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“…14 Large single crystals of α-HgS can be grown, which makes us hopeful that our chirality-dependent nonlinear Hall effect may be measurable in this system. However, doping 82 will be required to tune the Fermi level out of the gap and allow transport measurements. In this regard, it is worth mentioning that n-doped quantum dots of β-HgS have been successfully synthesized.…”

Section: ■ Computational Methodsmentioning

confidence: 99%

Chirality-Tunable Nonlinear Hall Effect

Joseph,

Bandyopadhyay,

Narayan

2024

Chem. Mater.

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The nonlinear generalization of the Hall effect has recently gained much attention, with a rapidly growing list of noncentrosymmetric materials that display higher-order Hall responses under time-reversal invariant conditions. The intrinsic second-order Hall response arises due to the first-order moment of Berry curvature� termed Berry curvature dipole�which requires broken inversion and low crystal symmetries. Chiral materials are characterized by their lack of improper symmetries such as inversion, mirror plane, and rotoinversion. Owing to this absence of symmetries, in this work, we propose chiral systems as ideal platforms to study the Berry curvature dipole-induced nonlinear Hall effects. We use state-of-the-art firstprinciples computations, in conjunction with symmetry analyses, to explore a variety of chiral material classes�metallic NbSi 2 , semiconducting elemental Te, insulating HgS, and topological multifold semimetal CoSi. We present the emergence and tunability of the Berry curvature dipole in these chiral materials. In particular, we demonstrate that the two enantiomeric pairs exhibit an exactly opposite sign of the Berry curvature dipole. We complement our ab initio findings with a general tight-binding minimal model and give estimates for nonlinear Hall voltages, which are experimentally accessible. Our predictions put forward chiral materials as an emerging class of materials to realize nonlinear Hall phenomena and highlight an as-yet-unexplored aspect of these systems.

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