Epitaxial binding and strain effects of monolayer stanene on the 
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 surface

Eltinge, Stephen; Ismail‐Beigi, Sohrab

doi:10.1103/physrevmaterials.6.014007

Cited by 4 publications

(1 citation statement)

References 47 publications

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“…We can clearly see a pair of helical edge states which is consistent with the value of C S =1. We also calculated the Wannier charge centers (WCCs) [38,[42][43][44] which is shown in figure 9. There is an odd number of crossing between WCCs (red thick lines) and gap function (thin blue line) which further confirms the non trivial band topology in YBM QLs.…”

Section: D Ybmg 2 Bimentioning

confidence: 99%

First principles prediction of novel quantum topological insulator state in two-dimensional XMg₂Bi₂ (X=Eu/Yb)

Choudhury,

Maitra

2024

J. Phys.: Condens. Matter

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Topological insulator, a novel quantum state of materials, has a lot of signiﬁcance in the development of low-power electronic equipments as the conducting edge states display exceptional endurance against back-scattering. The absence of suitable materials with high fabrication feasibility and signiﬁcant nontrivial bandgap, is now the biggest hurdle in their potential applications in devices. Here, we illustrate using ﬁrst principles density functional calculations that the quintuplet layers of EuMg2Bi2 and YbMg2Bi2 crystals are potential two-dimensional topological insulators with a sizeable nontrivial gaps of 72 meV and 147 meV respectively. Dynamical stability of these quintuplet layers of EuMg2Bi2and YbMg2Bi2 is conﬁrmed by our phonon calculations. The weakly coupled layered structure of parent compounds makes it possible for simple exfoliation from a three-dimensional structure. We observed gapless edge states inside the bulk band gap in both the systems which indicate their topological insulator nature. Further, we observed the anomalous and spin Hall conductivities to be quantized in two dimensional EuMg2Bi2 and YbMg2Bi2 respectively. Our ﬁndings predict two viable candidate materials as two dimensional quantum topological insulators which can be explored by future experimental investigations and possible applications of quantized spin and anomalous Hall conductance in spintronics.

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Section: D Ybmg 2 Bimentioning

confidence: 99%

First principles prediction of novel quantum topological insulator state in two-dimensional XMg₂Bi₂ (X=Eu/Yb)

Choudhury,

Maitra

2024

J. Phys.: Condens. Matter

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First-principles study of the effect of S-atom doping on the optoelectronic properties of stanene

Ma,

Liu,

Gao

et al. 2024

J Mol Model

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Spin-filtering properties of topological structures based on stanene and bismuthene nanoribbons with one edge magnetism

Akhoundi,

Houssa,

Afzalian

2024

Discov Electron

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The transport properties of spin filters based on two-dimensional magnetic topological insulators (TI) with magnetism at one edge are theoretically studied. The non-equilibrium-Green’s-function (NEGF) formalism based on density functional theory (DFT) derived Hamiltonian is used to study the one-way helical edge states in these structures. We investigated the electronic and magnetic properties of stanene and bismuthene nanoribbons with various metal edge modifications. Our DFT simulations predict the formation of one-way helical edge states in stanene nanoribbons with asymmetric edge passivation. Our results suggest that the spin filtering properties of such structures outperform a comparable spin filter based on spin-polarized quantum-anomalous-Hall effect, as it bypasses a need for a strict interplay of magnetism, topology, and a large electric field (around 2 V gate voltage difference).

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Epitaxial binding and strain effects of monolayer stanene on the Al2O3(0001) surface

Cited by 4 publications

References 47 publications

First principles prediction of novel quantum topological insulator state in two-dimensional XMg₂Bi₂ (X=Eu/Yb)

First principles prediction of novel quantum topological insulator state in two-dimensional XMg₂Bi₂ (X=Eu/Yb)

First-principles study of the effect of S-atom doping on the optoelectronic properties of stanene

Spin-filtering properties of topological structures based on stanene and bismuthene nanoribbons with one edge magnetism

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Epitaxial binding and strain effects of monolayer stanene on the Al2O3(0001) surface

Cited by 4 publications

References 47 publications

First principles prediction of novel quantum topological insulator state in two-dimensional XMg2Bi2 (X=Eu/Yb)

First principles prediction of novel quantum topological insulator state in two-dimensional XMg2Bi2 (X=Eu/Yb)

First-principles study of the effect of S-atom doping on the optoelectronic properties of stanene

Spin-filtering properties of topological structures based on stanene and bismuthene nanoribbons with one edge magnetism

Contact Info

Product

Resources

About

First principles prediction of novel quantum topological insulator state in two-dimensional XMg₂Bi₂ (X=Eu/Yb)

First principles prediction of novel quantum topological insulator state in two-dimensional XMg₂Bi₂ (X=Eu/Yb)