Role of Dirac nodal lines and strain on the high spin Hall conductivity of epitaxial IrO 2 thin films Arnab Bose 1* ,Jocienne N.Nelson 2 ,Xiyue S.Zhang 1 ,Rakshit Jain 2 ,D.G.Schlom 3,4 (PDF) Tunable two-dimensional Dirac nodal netsOct 05,2018·(f) Combination of the double zipper and double eye mask Dirac nodal lines forming tunable 2D Dirac nodal nets.(a) Crystal structure of K 2 SnBi.(b) The structure
Strain Related Effects on the Band Structure In this chapter a short introduction to the theory of stress and strain in elastic bodies is given.To improve the performance of FBMC simulations it is important to take advantage of the symmetry properties of the band structure.Therefore,the symmetry properties of the reciprocal diamond lattice 2.Strain Related Effects on the Band Structure - TU WienStrain Related Effects on the Band Structure In this chapter a short introduction to the theory of stress and strain in elastic bodies is given.To improve the performance of FBMC simulations it is important to take advantage of the symmetry properties of the band structure.Therefore,the symmetry properties of the reciprocal diamond lattice 3.Strain Effects on the Electronic Band StructureFinally,the effect of strain on the band structure is presented in Section 3.3.The strain-induced shift in the energy levels of the conduction and valence bands is discussed within the framework of the deformation potential theory and the method.Different stress configurations including biaxial stress as well as uniaxial stress applied along high-symmetry and arbitrary directions are then analyzed.
Request PDF 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 Author Bernardus Rendy,Eddwi H.HasdeoPublish Year 2020Strain 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-lineCreation of Dirac nodal line by extrinsic symmetryCreation of Dirac nodal line by extrinsic symmetry engineering  phase of Bi adlayer on Cu(111),2 but its effect on Cu band structure has not been studied yet.The Cu atoms in the central 7 layer were fixed.In order to avoid the interaction between the slabs,a vacuum of 24 Å was used.
peaks.(c) The calculated band structure by GGA +SOC along a selected high symmetry path.The nodal lines discussed in this work are marked by the dashed boxes.The -X and R-Adirections normal to the lines are shown twice for representing the characteristic Dirac crossings,marked by circles superposed to the band structure.EveryDirac nodal surfaces and nodal lines in ZrSiS Science Figure 2C plots a schematic band structure in an arbitrary k x-k y plane near the nodal surface.The degenerated band splits into two away from the nodal surface,and the bands show a Dirac-like crossing in the normal direction of the nodal surface.As discussed later,these features are observed in our experimental data.Effect of Mechanical Strain on the Optical Properties of Effect of Mechanical Strain on the Optical Properties of Nodal-Line Semimetal ZrSiS In comparison to Dirac and Weyl semimetals,band crossing in nodal-line semimetals occurs along continuous lines.Since 2011,several materials were proposed to be nodal- Calculated band structure and orbital-resolved density of states in the vicinity
·Despite that the formation of a Dirac point and a band gap in monolayer FeSe were predicted by the DFT-based calculations and supported by experimental studies ,,our results for the FeS monolayer in equilibrium suggest that its electronic structure is different from that of FeSe.Nevertheless,the band gap occurs under tensile strain,i.e Effects of Anisotropic Strain on Spin-Orbit Torque Nov 24,2020·Effects of Anisotropic Strain on Spin-Orbit Torque Produced by the Dirac Nodal Line Semimetal IrO2.Arnab Bose School of Applied and Engineering Physics,Cornell University,Ithaca,New York 14853,United States.Effects of Anisotropic Strain on SpinOrbit Torque We report spin-torque ferromagnetic resonance studies of the efficiency of the damping-like (DL) spinorbit torque exerted on an adjacent ferromagnet film by current flowing in epitaxial (001) and (110) IrO2 thin films.IrO2 possesses Dirac nodal lines (DNLs) in the band structure that are gapped by spinorbit coupling,which could enable a very high spin Hall conductivity,SH.We find
We report spin-torque ferromagnetic resonance studies of the efficiency of the damping-like (DL) spinorbit torque exerted on an adjacent ferromagnet film by current flowing in epitaxial (001) and (110) IrO2 thin films.IrO2 possesses Dirac nodal lines (DNLs) in the band structure that are gapped by spinorbit coupling,which could enable a very high spin Hall conductivity,SH.We find Ferromagnetic two-dimensional metal-chlorides MCl (M = Sc Aug 01,2020·For example,nodal lines can have different band dispersions around the band crossing,which produces their classification of type-I,type-II ,,,critical type ,and hybrid nodal lines ,.In addition,according to the different degeneracies of band crossings,nodal lines can be termed as Dirac nodal lines (with fourfold degeneracy) and Weyl Nodal ring spin gapless semiconductor New member of Multiple nodal rings located exactly at Fermi level with all hourglass shape dispersions. Very clean spin gapless band structures and nodal ring states with no other band interferences. Strong robustness against both the spin orbit coupling effect and strain conditions. A novel concept of nodal ring spin gapless semiconductor is
·Nodal-line semimetals are characterized by symmetry-protected band crossing lines and are expected to exhibit nontrivial electronic properties.Connections of the multiple nodal lines,resulting in nodal nets,chains,or links,are envisioned to produce even more exotic quantum states.In this work,we propose a feasible approach to realize tunable nodal-line connections in real materials.Pseudo-Landau levels of Bogoliubov quasiparticles in pseudo-LLs [22,23],and interaction effects which can lead to exotic correlated states [24,25].Strain effects have also been generalized to three-dimensional (3D) Dirac and Weyl semimetals ,Kitaev spin liquids ,and atoms in optical lattices [31,32].InRole of Dirac nodal lines and strain on the high spin Hall Here we experimentally study strong SOT from the topological semimetal IrO2 in (001) and (110) normal films,which exhibit distinctly different SHE strengths.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).
exhibits Dirac nodal lines (DNL) in the band structure,which could enable a very high spin Hall conductivity,.The (001) films exhibit exceptionally high DL ranging from 0.45 at 293 K to 0.65 at 30 K which sets the lower bounds of Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextTopological phase transitions driven by strain in Sep 06,2018·The 2D square tellurium system shows three structural phases via strain effect,i.e.,buckled square,buckled rectangular,and planar square phases,which exhibit extraordinary topological properties.There are four anisotropic Dirac points in the buckled square phase,in which the Fermi velocity can be as high as 9.44 × 10 5 m / s.The buckled rectangular phase can behave as aStrain Effects on Band Structure and Dirac Nodal-Line We found that the Dirac nodal-line of ZrSiSe is robust to all strain with reasonable magnitude.Although,there are significant changes in gap,amplitude,and energy relative to Fermi energy.We also found the effective strains to tune the nodal-line and band structures are
The Dirac nodal-line semimetals are new promising materials for technological applications due to their exotic properties,which originate from band structure dispersion and nodal-line behavior.WeStrain-Tuned Nodal Ring in Two-Dimensional Zn3C6S6By analyzing the energy band,we found that the energy band characteristics satisfy the conditions for forming the nodal ring,and then,the strain control of the structure is found.Under certain compressive strain,as we expected,the nodal ring was regulated near the Fermi surface.Strain-induced nonsymmorphic symmetry breaking and removal A new type of 3D Dirac material,nodal-ring has a larger density of states near to the Dirac cones due to it having more Dirac cones compared to Dirac semimetals.We developed a modified RD law to
Aug 01,2018·Elastics strain has a remarkable effect on Dirac and Weyl fermions in solids,initially found in 2D Dirac semimetal graphene it induces scalar potential and vector (to be more precise,pseudovector) potential having exactly the form of potential induced by external magnetic field ,.It is called pseudomagnetic field (PMF); the only difference between PMF and real magnetic field is thatTopological piezoelectric effect and parity anomaly in PHYSICAL REVIEW RESEARCH2,043311 (2020) Topological piezoelectric effect and parity anomaly in nodal line semimetals Taiki Matsushita,1Satoshi Fujimoto,and Andreas P.Schnyder2 1Department of Materials Engineering Science,Osaka University,Toyonaka,Osaka 560-8531,Japan 2Max-Planck-Institute for Solid State Research,Heisenbergstrasse 1,70569 Stuttgart,GermanyTunable Weyl and Dirac states in the nonsymmorphic Recent interest in topological semimetals has led to the proposal of many new topological phases that can be realized in real materials.Next to Dirac and Weyl systems,these include more exotic phases based on manifold band degeneracies in the bulk electronic structure.The exotic states in topological semimetals are usually protected by some sort of crystal symmetry,and the introduction of
FIG.3.(a) Band structure of YN along the high-symmetry lines of the Brillouin zone without SOC.Red and green dots in band structures indicate the projection onto the N p zand Y d 2 orbitals,respectively.(b) The 3D plot of the band structure around the Fermi level.The bottom[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