Electronic bound states in the continuum in a two-dimensional metal

IF 47.3 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2026-10-22 DOI:10.1126/science.adt9825

Morgan Thinel, Xiong Huang, Daniel G. Chica, Simon Turkel, Sebastian E. Rossi, Christie S. Koay, Hong Li, Willa Mihalyi-Koch, Bipasa Samanta, Madisen Holbrook, Aravind Devarakonda, Luca M. Nashabeh, Alexandru B. Georgescu, Xavier Roy, Xiaoyang Zhu, Abhay N. Pasupathy, Raquel Queiroz

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Abstract

Bound states in the continuum (BICs) are quantum states that remain localized despite lying within a continuum of extended, delocalized states. Whereas optical BICs have been realized in photonic systems, achieving electronic bound states embedded in a metallic background remains an ongoing challenge. In this study, we used scanning tunneling microscopy to identify two defect-induced electronic states that remain localized within the metallic continuum of Pd₅AlI₂, a two-dimensional van der Waals metal. Our calculations suggest that electron-hopping interference on the decorated checkerboard lattice of Pd₅AlI₂ gives rise to a (quasi) flat band built from spatially localized eigenstates that are orthogonal to the dispersive continuum. Atomic defects within this frustrated lattice shift the associated flat-band localized states into the metallic continuum, forming robust, symmetry-protected BICs.

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二维金属连续体中的电子束缚态

连续统中的束缚态（bic）是尽管处于扩展的非定域态连续统中，但仍保持局域化的量子态。虽然光学bic已经在光子系统中实现，但在金属背景中实现电子束缚态仍然是一个持续的挑战。在这项研究中，我们使用扫描隧道显微镜识别了两个缺陷诱导的电子态，它们仍然局限于二维范德华金属pd5al2的金属连续体中。我们的计算表明，在pd5ali 2的装饰棋盘格上的电子跳变干涉产生了一个由与色散连续体正交的空间局域本征态构建的（准）平坦带。在这个受挫晶格中的原子缺陷将相关的平带局域态转移到金属连续体中，形成坚固的、对称保护的bic。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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