Optical response from charge-density waves in Weyl semimetals

@article{McKay2021OpticalRF,
  title={Optical response from charge-density waves in Weyl semimetals},
  author={Robert C. McKay and Barry Bradlyn},
  journal={Physical Review B},
  year={2021}
}
The study of charge-density wave (CDW) distortions in Weyl semimetals has recently returned to the forefront, inspired by experimental interest in materials such as (TaSe4)2I. However, the interplay between collective phonon excitations and charge transport in Weyl-CDW systems has not been systematically studied. In this paper, we examine the longitudinal electromagnetic response due to collective modes in a Weyl semimetal gapped by a quasi-one-dimensional charge-density wave order, using both… 

References

SHOWING 1-10 OF 127 REFERENCES
Axionic charge-density wave in the Weyl semimetal (TaSe4)2I
TLDR
The results show that it is possible to find experimental evidence for axions in strongly correlated topological condensed matter systems, which have so far been elusive in any other context.
Dynamics of charge density wave order in the quasi one dimensional conductor (TaSe4)2I probed by femtosecond optical spectroscopy
Carrier and collective mode dynamics in the quasi one-dimensional charge density wave (CDW) system (TaSe4)2I have been investigated by means of time-resolved optical pump-probe spectroscopy. In the
Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals
An optical second-harmonic generation study of a series of transition metal monopnictide Weyl semimetals reveals a giant, anisotropic nonlinear optical response in these systems. Although Weyl
Quantized circular photogalvanic effect in Weyl semimetals
TLDR
In a class of Weyl semimetals and three-dimensional Rashba materials without inversion and mirror symmetries, the injection contribution to the CPGE trace is effectively quantized in terms of the fundamental constants e, h, c and with no material-dependent parameters.
The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi.
TLDR
A large negative LMR with the field-steering properties specific to the chiral anomaly is observed in the half-Heusler GdPtBi, and the scheme of creating Weyl nodes from quadratic bands suggests that the Chiral anomaly may be observable in a broad class of semimetals.
Observation of Weyl nodes in TaAs
Experiments show that TaAs is a three-dimensional topological Weyl semimetal. In 1929, H. Weyl proposed that the massless solution of the Dirac equation represents a pair of a new type of particles,
Three-dimensional quantum Hall effect and metal–insulator transition in ZrTe5
TLDR
Evidence of the three-dimensional quantum Hall effect and a magnetic-field-driven quantum phase transition are observed in zirconium pentatelluride crystals, providing experimental evidence of the 3D QHE and a promising platform for further exploration of exotic quantum phases and transitions in 3D systems.
Charge Density Waves as a Tool for Creating Idealized (Magnetic) Topological Semimetals
New developments in the field of topological matter are often driven by materials discovery. In the last few years, large efforts have been performed to classify all known inorganic materials with
Magnetic Weyl semimetal phase in a Kagomé crystal
TLDR
Using angle-resolved photoemission spectroscopy, the electronic structure of the ferromagnetic crystal Co3Sn2S2 is visualized and discovered its characteristic surface Fermi-arcs and linear bulk band dispersions across the Weyl points, establishing Co3 Sn 2S2 as a magnetic Weyl semimetal that may serve as a platform for realizing phenomena.
Topological nature of nonlinear optical effects in solids
TLDR
Various nonlinear optical effects, such as the shift current in noncentrosymmetric materials, photovoltaic Hall response, and photo-induced change of order parameters under the continuous irradiation of monochromatic light are described in a unified fashion by topological quantities involving the Berry connection and Berry curvature.
...
1
2
3
4
5
...