Two-dimensional Dirac semimetals with tunable edge states

Abstract

We theoretically propose a design for two-dimensional Dirac semimetals using a bilayer-modified Bernevig-Hughes-Zhang (BHZ) model. By introducing new sites into the BHZ model, we engineer flat bands at the Fermi energy. In the bilayer system, interlayer coupling separates these flat bands, resulting in two Dirac points that preserve time-reversal and inversion symmetries. Two Dirac points are connected by a one-dimensional Fermi arc edge state, whose bound nature is confirmed by quantized transmission resonance peaks. Notably, the position of the Dirac points can be precisely tuned by adjusting interlayer coupling strengths and symmetries.

References in corpus (48)

• Electric Field Effect in Atomically Thin Carbon Films
• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Effect in Graphene
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Berry Phase Effects on Electronic Properties
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Weyl Semimetal in a Topological Insulator Multilayer
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Experimental discovery of Weyl semimetal TaAs
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Colloquium: The transport properties of graphene: An introduction
• Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
• Dirac Line Nodes in Inversion Symmetric Crystals
• Topological nodal line semimetals
• Dirac Semimetals in Two Dimensions
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Colossal Bulk Photovoltaic Effect in a Weyl Semimetal
• Topological Semimetals Predicted from First-principles Calculations
• Spin-orbit-free Weyl-loop and Weyl-point semimetals in a stable three-dimensional carbon allotrope
• Berry Curvature Enhanced Nonlinear Photogalvanic Response of Type-II Weyl Cone
• Gate-Tunable Negative Longitudinal Magnetoresistance in the Predicted Type-II Weyl Semimetal WTe2
• Giant Planar Hall Effect in Topological Metals
• Topological surface Fermi arcs in the magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Symmetry Demanded Topological Nodal-line Materials
• Nonsymmorphic-symmetry-protected hourglass Dirac loop, nodal line, and Dirac point in bulk and monolayer $X_3$SiTe${}_6$ ($X=$ Ta, Nb)
• Quantum transport through a graphene nanoribbon-superconductor junction
• Green's function technique for studying electron flow in 2D mesoscopic samples
• Two-dimensional Spin-Orbit Dirac Point in Monolayer HfGeTe
• Filling-enforced Magnetic Dirac Semimetals in Two Dimensions
• Two-dimensional Dirac Semimetals without Inversion Symmetry
• Two-dimensional antiferromagnetic Dirac fermions in monolayer TaCoTe${}_2$
• Emergence of Topological Nodal Lines and Type II Weyl Nodes in Strong Spin--Orbit Coupling System InNbX2(X=S,Se)
• Two-dimensional Massless Dirac Fermions in Antiferromagnetic AFe2As2 (A = Ba, Sr)
• Engineering second-order topological insulators via coupling two first-order topological insulators
• Plasmons in a two-dimensional nonsymmorphic nodal-line semimetal
• Edge states in a two-dimensional non-symmorphic semimetal

Cited by in corpus (1)

• Tunable two-dimensional Dirac-Weyl semimetal phase induced by altermagnetism