Magneto-optical conductivity of a topological nodal ring semimetal in a tilted magnetic field

Duan, Wenye; Ma, Zhongshui; Zhang, Chao

doi:10.1103/physrevb.102.195123

Cited by 6 publications

(3 citation statements)

References 58 publications

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“…2, we carefully label each LL transition, and observe that, the selection rules are n → n in the longitudinal conductivity Re(σ xx ), and n → n ± 2 in the transverse conductivity Re(σ zz ). The former selection rules are the same as the previous magneto-optic studies of E B [19,[28][29][30][31]; whereas the latter ones are distinctively different from the previous studies of E ⊥ B with conventional selection rules given as n → n ± 1 [10,16,19,[26][27][28][29][30]32].…”

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confidence: 89%

Unconventional Optical Selection Rules in ZrTe5 under an In-plane Magnetic Field

Wang¹,

Li²

2022

Preprint

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The optical selection rules of an electron system under a magnetic field play key roles in determining its optical properties, from which the band structures and underlying symmetries can be derived. In this Letter, based on a three-dimensional strong topological insulator model describing ZrTe5, we study the Landau levels (LLs) and magneto-optical conductivity under an in-plane magnetic field. We reveal that in the transverse conductivity Re(σzz), the unconventional optical selection rules n → n ± 2 dominate, with n being the LL index. We attribute the unconventional selection rules to the peculiar distribution of parity carried by the LLs, resulting from the chiral symmetry of the sub-Hamiltonians. Moreover, we predict that, if the strong anisotropic system is tuned to be nearly isotropic, the LLs would redistribute and the conventional selection rules n → n ± 1 can be recovered.

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confidence: 89%

Unconventional Optical Selection Rules in ZrTe5 under an In-plane Magnetic Field

Wang¹,

Li²

2022

Preprint

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“…The magneto-optical conductivity has been shown to be a valuable technique in identifying the band structures as well as the topological properties of various materials [27,[33][34][35][36][37]. We focus on the diagonal terms of the optical conductivity tensor, which can be calculated by using the linear-response Kubo formula [30,32],…”

Section: Magneto-optical Conductivitymentioning

confidence: 99%

Magneto-optic signatures in the gapped Dirac semimetal with mixed linear and parabolic dispersions of ZrTe₅

2021

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In this paper, we give a systematic theoretical study on the Landau levels (LLs) and magneto-optical conductivity Re(σαα) in a gapped Dirac semimetal model with mixed linear and parabolic dispersions under a magnetic field, which was recently proposed by Jiang et al. [Phys. Rev. Lett. 125, 046403 (2020)] to explain the experimental magnetoinfrared spectroscopy in the three-dimensional ZrTe5 crystal. We find that the strong magnetic field can drive the LLs become noninverted and thus the strong topological insulator phase in ZrTe5 turns to be a trivial insulator. In the different magnetic field regions, the density of states and Re(σαα) can exhibit distinct signatures. Moreover, when the magnetic field is weak, a qualitative relation in Re(σzz) between the peaks at the saddle points is revealed as Re(σzz ζn) >Re(σzz Γ) , which is in good agreement with the experiment.

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“…In experiments, these resonance peaks can reflect the basic band structure [ 36 , 37 , 38 ], and the magneto-optical properties as a response function are also a particular experimental measure for topological materials [ 39 , 40 ]. Recent studies on magneto-optical properties have provided very useful information for topological semimetals [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. Therefore, this work based on Kubo formula to study the magneto-optical transport properties of type-II NLS is valuable.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Optical Transport Properties of Type-II Nodal Line Semimetals

Sun

Zhao

et al. 2021

Materials

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We investigate the magneto-optical transport properties and Landau levels of type-II nodal line semimetals. The tilted liner dispersion in type-II nodal line semimetals makes the conduction band and valence band asymmetric, and Landau levels are coupling in the presence of a magnetic field. We find the background of absorption peaks is curved. The oscillation peaks are tailless with the change of magnetic field. Through tuning tilt term, we find the absorption peaks of optical conductivity change from incomplete degenerate structure to splitting double peaks structure. We also find interband absorption peaks is no longer zero in the imaginary part of Hall conductivity. With the change of the tilt term, the contribution of the absorption peak has two forms, one is that the negative peak only appears at high frequencies, and the other is two adjacent peaks with opposite signs. In addition, the resistivity, circularly polarized light and magnetic oscillation of Hall conductivity are studied.

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Magneto-optical conductivity of a topological nodal ring semimetal in a tilted magnetic field

Cited by 6 publications

References 58 publications

Unconventional Optical Selection Rules in ZrTe5 under an In-plane Magnetic Field

Unconventional Optical Selection Rules in ZrTe5 under an In-plane Magnetic Field

Magneto-optic signatures in the gapped Dirac semimetal with mixed linear and parabolic dispersions of ZrTe₅

Magneto-Optical Transport Properties of Type-II Nodal Line Semimetals

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Magneto-optical conductivity of a topological nodal ring semimetal in a tilted magnetic field

Cited by 6 publications

References 58 publications

Unconventional Optical Selection Rules in ZrTe5 under an In-plane Magnetic Field

Unconventional Optical Selection Rules in ZrTe5 under an In-plane Magnetic Field

Magneto-optic signatures in the gapped Dirac semimetal with mixed linear and parabolic dispersions of ZrTe5

Magneto-Optical Transport Properties of Type-II Nodal Line Semimetals

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Magneto-optic signatures in the gapped Dirac semimetal with mixed linear and parabolic dispersions of ZrTe₅