Two-Dimensional Superconductivity in Air-Stable Single-Crystal Few-Layer Bi3O2S3

Zou, Xiaobin; Xie, Mingyuan; Wang, Ruize; Liang, Haikuan; Li, Yan; Tian, Fei; Sun, Yong; Wang, Chengxin

doi:10.1021/jacs.3c06854

Cited by 2 publications

(1 citation statement)

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“…Pressure, as a fundamental thermodynamic parameter, has proven to be a potent tool for effectively manipulating the electronic structure of materials. Recent investigations have shown that pressure can effectively alter the band structures of graphene/hexagonal boron nitride moiré superlattices and transition metal dichalcogenides and induce changes in the correlated electronic phases in twisted bilayer graphene. − Fortunately, Bi 2 O 2 Se with a ThCr 2 Si 2 -type (so-called “122”) structure formed by alternate stacking of insulating [Bi 2 O 2 ] 2+ and conducting [Se] 2– square net layers with weak electrostatic interactions between them can be regarded as a special heterostructure . These features bring infinite possibilities for adjusting the structure and electronic states of Bi 2 O 2 Se by changing the interlayer spacing and intra- or interlayer interactions.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Flat Band in Bi₂O₂Se by Pressure to Induce Superconductivity

Tian,

Tu,

Jin

et al. 2024

J. Am. Chem. Soc.

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The discovery of superconductivity in twisted bilayer graphene has reignited enthusiasm in the field of flat-band superconductivity. However, important challenges remain, such as constructing a flat-band structure and inducing a superconducting state in materials. Here, we successfully achieved superconductivity in Bi2O2Se by pressure-tuning the flat-band electronic structure. Experimental measurements combined with theoretical calculations reveal that the occurrence of pressure-induced superconductivity at 30 GPa is associated with a flat-band electronic structure near the Fermi level. Moreover, in Bi2O2Se, a van Hove singularity is observed at the Fermi level alongside pronounced Fermi surface nesting. These remarkable features play a crucial role in promoting strong electron–phonon interactions, thus potentially enhancing the superconducting properties of the material. These findings demonstrate that pressure offers a potential experimental strategy for precisely tuning the flat band and achieving superconductivity.

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Section: Introductionmentioning

confidence: 99%

Tuning the Flat Band in Bi₂O₂Se by Pressure to Induce Superconductivity

Tian,

Tu,

Jin

et al. 2024

J. Am. Chem. Soc.

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2D Growth of BiSCl as Anisotropic Photodetector with Ultrahigh Responsivity and Detectivity

Lin,

Yuan,

Wang

et al. 2024

Advanced Optical Materials

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BiSCl, which shares the anisotropic chain‐like lattice configuration with the BiVXVIYVII (XS, Se; YCl, Br, I) family displays high photoelectric conversion efficiency in the UV–vis wavelength region. The current difficulty in 2D growth restricts the investigation of device performance and further integration. Herein, an epitaxial growth strategy for 2D BiSCl is proposed based on the principle of sharing a chloridion layer at the BiSCl/BiOCl interface. The interfacial atomic arrangement is carefully revealed using atomic resolved AC‐TEM(Spherical Aberration High Transmission Electron Microscope) and demonstrated by calculations based on density functional theory. Benefiting from its compatibility with PS‐assisted large‐scale transfer technology, the photoelectric performance is evaluated by constructing a standard symmetrical photoconductor and Graphene‐BiSCl Schottky junction device. High responsivity (1.71 × 104 A W−1) and detectivity (5.9 × 1016. Jones) are achieved at 405 nm, and robustness is shown in a broadband spectrum, which manifested prominent anisotropic photoelectric behavior and great potential in weak‐light detection. These results elucidate the photoelectric applications of BiSCl semiconductors and the structural design of the BiVXVIYVII family.

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Two-Dimensional Superconductivity in Air-Stable Single-Crystal Few-Layer Bi₃O₂S₃

Cited by 2 publications

References 53 publications

Tuning the Flat Band in Bi₂O₂Se by Pressure to Induce Superconductivity

Tuning the Flat Band in Bi₂O₂Se by Pressure to Induce Superconductivity

2D Growth of BiSCl as Anisotropic Photodetector with Ultrahigh Responsivity and Detectivity

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Two-Dimensional Superconductivity in Air-Stable Single-Crystal Few-Layer Bi3O2S3

Cited by 2 publications

References 53 publications

Tuning the Flat Band in Bi2O2Se by Pressure to Induce Superconductivity

Tuning the Flat Band in Bi2O2Se by Pressure to Induce Superconductivity

2D Growth of BiSCl as Anisotropic Photodetector with Ultrahigh Responsivity and Detectivity

Contact Info

Product

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About

Two-Dimensional Superconductivity in Air-Stable Single-Crystal Few-Layer Bi₃O₂S₃

Tuning the Flat Band in Bi₂O₂Se by Pressure to Induce Superconductivity

Tuning the Flat Band in Bi₂O₂Se by Pressure to Induce Superconductivity