대표연구 논문 실적
Direct measurement of the quantum metric tensor in solids
발행년도
20250605
저자
Sunje Kim, Yoonah Chung, Yuting Qian, Soobin Park, Chris Jozwiak, Eli Rotenberg, Aaron Bostwick, Keun Su Kim, BohmJung Yang
저널
SCIENCE
작성자
admsnulamp
작성일
2026-10-07
조회
42
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.
DOI: http://dx.doi.org/10.1126/science.ado6049
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.
DOI: http://dx.doi.org/10.1126/science.ado6049
