Direct measurement of the quantum metric tensor in solids

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-06-05 DOI:10.1126/science.ado6049

Sunje Kim, Yoonah Chung, Yuting Qian, Soobin Park, Chris Jozwiak, Eli Rotenberg, Aaron Bostwick, Keun Su Kim, Bohm-Jung Yang

引用次数: 0

Abstract

The quantum metric tensor is a central geometric quantity in modern physics that is defined as the distance between nearby quantum states. Despite numerous studies highlighting its relevance to fundamental physical phenomena in solids, measuring the complete quantum metric tensors in real solid-state materials is challenging. In this work, we report a direct measurement of the full quantum metric tensors of Bloch electrons in solids using black phosphorus as a representative material. We extracted the momentum space distribution of the pseudospin texture of the valence band from the polarization dependence of angle-resolved photoemission spectroscopy measurement. Our approach is poised to advance our understanding of quantum geometric responses in a wide class of crystalline systems.

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固体中量子度量张量的直接测量

量子度量张量是现代物理学中的一个中心几何量，它被定义为邻近量子态之间的距离。尽管许多研究强调了它与固体中基本物理现象的相关性，但测量真实固体材料中的完整量子度量张量是具有挑战性的。在这项工作中，我们报告了用黑磷作为代表材料直接测量固体中布洛赫电子的全量子度量张量。我们从角分辨光谱学测量的偏振依赖性中提取了价带赝自旋织构的动量空间分布。我们的方法有望推进我们对广泛晶体系统中量子几何响应的理解。

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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