strain effects on band structure and dirac nodal

2D BeP 2 monolayer:investigation of electronic and

  • IntroductionResults and DiscussionAcknowledgementsBeryllium di-phosphide (BeP2) has attracted significant attention recently due to its Dirac semimetal state, excellent stability in the ambient environment, thermal stability, and high carrier mobility. Herein, we concentrated on a P and Be atomic sheet because Be is generally utilized as one of the constituent components in 2D binary compounds, including h-BeS,14 Be2C,15 and Be5C2.16 Besides, a BeN2 nanosheet is considered to be stable with outstanding properties due to its high stability and direct banExperimental Observation and Spin Texture of Dirac Node May 14, 2021 · Here, we discuss the symmetry analysis, band connectivity along high-symmetry lines using group representations, band structure, the nature of the Dirac points and of a nodal line occurring near F which is protected by the crystalline symmetry. The de Haasvan Alphen effect indicates a Fermi surface in agreement with the calculations.

    A Theoretical Study on the Design, Structure, and

    -, -, - and 6,6,12-graphynes are well established one-atom-thick two-dimensional (2D) materials in the graphyne family. These 2D sheets have been mainly designed by incorporating an acetylenic linker (CC) in graphene with different ratios. The graphdiynes and their higher order 2D architectures have also been studied to elucidate the effect of length of linker (CCCC Coexistence of Triple Nodal Points, Nodal Links, and We investigate the electronic structure and several properties, and topological character, of the cubic time-reversal invariant intermetallic compounds PbPd3 and SnPd3 using density functional theory based methods. These compounds have a dispersionless band along the X line, forming the top of the Pd 4d bands and lying within a few meV of the Fermi level EF. Effects of the flat band on

    HUHG;,Q 3 &D 6U

    Jun 20, 2020 · The topological line-node semimetal could be driven into 3D TI or Dirac semimetal by the SOC and strain. For example, CaTe [32] is a TSM, possessing the nodal rings without SOC, exhibiting Dirac semimetal behavior when SOC is included. When it was applied by appropriate strain, it becomes a strong topological insulator [3233, ]. Journal of Physics:Condensed Matter, Volume 33, Number Jun 02, 2021 · The strain significantly alters the electronic structure of In 2 XY and their photocatalytic activity. Besides, the indirectdirect gap transitions can be found due to applied strain. The effect of the electric field on optical properties of In 2 XY is negligible.

    Novel topological nodal lines and exotic drum-head-like

    Mar 01, 2020 · The effect of uniform strain on the band structure of TiOs was investigated and the results are given in Fig. 7. The optimized lattice constants under different uniform strains can be seen in Table S1. As shown in Fig. 7(a)(d), 1 GPa, 6 GPa, 10 GPa, and 20 GPa, respectively, were added during the calculations of band structures. In order to PHYSICAL REVIEW B97, 155 (2018)by applying strain or pressure. Intuitively, the band gap of rigid effect on the band structure, namely, should be classied as a 3D nodal-line semimetal instead of a 3D Dirac semimetal in the absence of SOC. To further elaborate on the above statement, we have tted

    Phys. Rev. B 95, 081102(R) (2017) - Two-dimensional

    Feb 01, 2017 · Band dispersion calculations reveal a Dirac point and a Dirac nodal ring near the Fermi level. The Dirac point is ascribed to the hybridization of e 2 and e 2 * orbitals, and the Dirac ring is formed due to dispersion of s and e 1 * orbitals. Upon inclusion of spin-orbit coupling, these Dirac states open topologically nontrivial local band gaps Phys. Rev. B 96, 205433 (2017) - Intrinsic Dirac half Nov 27, 2017 · The quantum anomalous Hall (QAH) effect has attracted extensive attention due to time-reversal symmetry broken by a staggered magnetic flux emerging from ferromagnetic ordering and spin-orbit coupling. However, the experimental observations of the QAH effect are still challenging due to its small nontrivial bulk gap. Here, based on density functional theory and Berry curvature calculations,

    Strain engineering the topological type-II Dirac semimetal

    Mar 15, 2021 · Our results demonstrate the tunability of Dirac nodes' energy and momentum with strain and that it is possible to bring them closer to the Fermi level, while other metallic bands are suppressed. Strain-induced pseudomagnetic and scalar fields in Aug 01, 2018 · 1. Introduction. Dirac and Weyl semimetals, gapless materials with linear dispersion of low-energy electron excitations effectively described by Dirac-like or Weyl-like equation, are being extensively studied both theoretically and experimentally , , , .. Elastics strain has a remarkable effect on Dirac and Weyl fermions in solids, initially found in 2D Dirac semimetal graphene:it induces

    Topological quantum catalyst:Dirac nodal line states and

    Dec 22, 2017 · band 1 in Fig. 4a) appear when the slabs thickness is over eight atomic layers along the b-axis. From Fig. 4a, outside the Dirac nodal ring, the two-fold degenerated topologi-cal SF-band 1 is clearly separated:one goes to the un-occupied conduction bands integrating with the projection of the electronic bands of bulk phase and the Visualizing Dirac nodal-line band structure of topological May 14, 2019 · As a member of ZrHM (H = Si/Ge/Sn; M = O/S/Se/Te) family materials, which were predicted to be the candidates of topological Dirac nodal-line semimetals, ZrGeSe exhibited particular properties, such as magnetic breakdown effect in the transport measurement, different from its other isostructural compounds, informing an unique topology of the electronic band structure. However,

    [2006.04365] Role of Dirac nodal lines and strain on the

    Jun 08, 2020 · Angle resolved photoemission spectroscopy studies have shown IrO2 exhibits Dirac nodal lines (DNL) in the band structure, which could enable a very high spin Hall conductivity (SHC). The (001) films exhibit exceptionally high damping like torque efficiency ranging from 0.45 at 293 K to 0.65 at 30 K which sets the lower bound of SHC that is ten times higher and of opposite sign than the Strain Effects on Band Structure and Dirac Nodal-line Sep 16, 2020 · Strain Effects on Band Structure and Dirac Nodal-line Morphology of ZrSiSe. The Dirac nodal-line semimetals (DNLS) are new promising materials for technological applications due to its exotic properties, which originate from band structures dispersion and nodal-line behavior. We report a study on effects of several possibilities of strains in ZrSiSe DNLS on band structure dispersion and nodal-line

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