What question did this study set out to answer?

To identify and characterize quantum spin Hall states in a buckled square lattice suitable for room-temperature spintronic applications.

March 30, 2015Nano LettersOpen Access

Room Temperature Quantum Spin Hall Insulators with a Buckled Square Lattice

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Authors

WLWei Luo HXHongjun Xiang

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Overview

Computational modeling demonstrates a large-gap quantum spin Hall effect in a buckled square BiF lattice, indicating viable room-temperature topological electronics.

Key Points

To identify and characterize quantum spin Hall states in a buckled square lattice suitable for room-temperature spintronic applications.
Conducted global structure optimization on bismuth fluoride (BiF) systems with thicknesses below 6.0 Å.
Analyzed electronic band structures and substrate interactions with a sodium fluoride (NaF) substrate.
Developed a two-orbital tight-binding model to characterize the low-energy physics of the buckled square lattice.
Identified a stable three-layer quasi-2D BiF structure with the lowest energy in its thickness regime, possessing a large topological band gap of 0.69 eV.
Demonstrated that topological states near the Fermi level localize to the central Bi layer and remain preserved on a NaF substrate due to outer inert BiF2 shielding layers.

Cite This Study

Luo et al. (2015) studied this question.

synapsesocial.com/papers/6a736b91ba4be02f56566510 https://doi.org/10.1021/acs.nanolett.5b00418

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March 30, 2015Nano LettersOpen Access

Room Temperature Quantum Spin Hall Insulators with a Buckled Square Lattice

View Full Paper

Ask AI

Bookmark

Authors

WLWei Luo HXHongjun Xiang

Discussion

Member takes

Overview

Computational modeling demonstrates a large-gap quantum spin Hall effect in a buckled square BiF lattice, indicating viable room-temperature topological electronics.

Key Points

To identify and characterize quantum spin Hall states in a buckled square lattice suitable for room-temperature spintronic applications.
Conducted global structure optimization on bismuth fluoride (BiF) systems with thicknesses below 6.0 Å.
Analyzed electronic band structures and substrate interactions with a sodium fluoride (NaF) substrate.
Developed a two-orbital tight-binding model to characterize the low-energy physics of the buckled square lattice.
Identified a stable three-layer quasi-2D BiF structure with the lowest energy in its thickness regime, possessing a large topological band gap of 0.69 eV.
Demonstrated that topological states near the Fermi level localize to the central Bi layer and remain preserved on a NaF substrate due to outer inert BiF2 shielding layers.

Cite This Study

Luo et al. (2015) studied this question.

synapsesocial.com/papers/6a736b91ba4be02f56566510 https://doi.org/10.1021/acs.nanolett.5b00418

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