Magneto-optical probe of the fully gapped Dirac band in ZrSiS

Uykur, Ece; Maulana, Lucky Zaehir; Schoop, Leslie M.; Lotsch, Bettina V.; Dressel, Martin; Pronin, A. V.

doi:10.1103/physrevresearch.1.032015

Cited by 10 publications

(11 citation statements)

References 27 publications

(39 reference statements)

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“…The sharp dip in the 10 K spectra could be interpreted as either a Pauli edge or the spin‐orbit gap, enabling hence the upper estimate for the gap of ≈30 meV. Our later magneto‐optical investigations provide a more accurate value of 26 meV, [ 89 ] in a reasonable agreement with the calculated value of 15 meV. [ 86 ]…”

Section: Linear Optical Response: Review Of Experimental Resultssupporting

confidence: 71%

“…Our later magneto-optical investigations provide a more accurate value of 26 meV [89], in a reasonable agrement with the calculated value of 15 meV [86].…”

Section: B Nodal-line Semimetalssupporting

confidence: 83%

“…Measurements of the optical conductivity in ZrSiS have been reported in previous studies. [ 26,84,88,89 ] Figure 4 shows the real part of the optical conductivity obtained in the study by Schilling et al [ 26 ] The striking feature of the spectra is the flat, frequency‐independent, region, spanning from 250 to 2500 cm −1 (30–300 meV) for almost all temperatures investigated (at T ≥ 100 K, the flat region starts at a bit higher frequencies because of a broadened free‐electron Drude mode). This observation is in perfect agreement with the simple‐model predictions for NLSMs discussed above (Equation (1) and (5)).…”

Section: Linear Optical Response: Review Of Experimental Resultsmentioning

confidence: 99%

“…Measurements of the optical conductivity in ZrSiS have been reported in Refs. [26,84,88,89]. In Fig.…”

Section: B Nodal-line Semimetalsmentioning

confidence: 97%

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Nodal Semimetals: A Survey on Optical Conductivity

Pronin

Dressel

2020

Physica Status Solidi (b)

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Among different topological and related phases of condensed matter, nodal semimetals occupy a special place -the electronic band topology in these materials is related to three-dimensional bulk, rather than to surface, states. A great variety of different realizations of electronic band crossings (the nodes) leads to a plethora of different electronic properties, ranging from the chiral anomaly to solid-state realizations of a black-hole horizon. The different nodal phases have similar low-energy band structure and quasiparticle dynamics, which both can be accessed experimentally by a number of methods. Optical measurements with their large penetration depth and high energy resolution are ideally suited as such a bulk probe; especially at low energies where other spectroscopic methods often lack the required resolution. In this contribution, we review recent optical-conductivity studies of different nodal semimetals, discuss possible limitations of such measurements, and provide a comparison between the experimental results, simple theoretical models, and band-structure-based calculations.

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Section: Linear Optical Response: Review Of Experimental Resultssupporting

confidence: 71%

“…Our later magneto-optical investigations provide a more accurate value of 26 meV [89], in a reasonable agrement with the calculated value of 15 meV [86].…”

Section: B Nodal-line Semimetalssupporting

confidence: 83%

Section: Linear Optical Response: Review Of Experimental Resultsmentioning

confidence: 99%

“…Measurements of the optical conductivity in ZrSiS have been reported in Refs. [26,84,88,89]. In Fig.…”

Section: B Nodal-line Semimetalsmentioning

confidence: 97%

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Nodal Semimetals: A Survey on Optical Conductivity

Pronin

Dressel

2020

Physica Status Solidi (b)

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“…Recently, the spin-orbit gap in ZrSiS, 2∆ so = 26 meV, was measured with the magneto-optical spectroscopy [52]. Although this value gives the gap averaged along the lines S-U and Σ-∆, we shall use it below in the estimates near the points Σ and ∆.…”

Section: Extremal Cross Sections Are On Two Different Necksmentioning

confidence: 99%

Crossing points of nodal lines in topological semimetals and Fermi surface of ZrSiS

Mikitik,

Sharlai

2020

Preprint

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We investigate the electron spectra, Fermi surfaces and their characteristics near crossing points of two band-contact lines in nodal-line semimetals. In particular, the extremal cross-sectional areas, and the appropriate cyclotron masses are calculated. We also find the phase of the quantum oscillations associated with the electron orbits near the crossing point. The analysis of all these quantities is carried out both without and with consideration of the spin-orbit interaction. To illustrate the obtained results, we apply them to ZrSiS in which the crossing of the nodal lines occurs.

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Transient Drude Response Dominates Near-Infrared Pump–Probe Reflectivity in Nodal-Line Semimetals ZrSiS and ZrSiSe

Kirby

Ferrenti

Weinberg

et al. 2020

J. Phys. Chem. Lett.

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The ultrafast optical response of two nodal-line semimetals, ZrSiS and ZrSiSe, was studied in the near-infrared using transient reflectivity. The two materials exhibit similar responses, characterized by two features, well resolved in time and energy. The first transient feature decays after a few hundred femtoseconds, while the second lasts for nanoseconds. Using Drude-Lorentz fits of the materials' equilibrium reflectance, we show that the fast response is well-represented by a decrease of the Drude plasma 1 arXiv:2005.04248v1 [cond-mat.mtrl-sci] 8 May 2020 frequency, and the second feature by an increase of the Drude scattering rate. This directly connects the transient data to a physical picture in which carriers, after being excited away from the Fermi energy, return to that vicinity within a few hundred femtoseconds by sharing their excess energy with the phonon bath, resulting in a hot lattice that relaxes only through slow diffusion processes (ns). The emerging picture reveals that the sudden change of the density of carriers at the Fermi level instantaneously modifies the transport properties of the materials on a timescale not compatible with electron phonon thermalization and is largely driven by the reduced density of states at the nodal line.

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Magneto-optical probe of the fully gapped Dirac band in ZrSiS

Cited by 10 publications

References 27 publications

Nodal Semimetals: A Survey on Optical Conductivity

Nodal Semimetals: A Survey on Optical Conductivity

Crossing points of nodal lines in topological semimetals and Fermi surface of ZrSiS

Transient Drude Response Dominates Near-Infrared Pump–Probe Reflectivity in Nodal-Line Semimetals ZrSiS and ZrSiSe

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