High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure

ABSTRACT The interplay between electronic correlations, density wave orders, and magnetism gives rise to several fascinating phenomena. In recent years, kagome metals have emerged as an excellent platform for investigating these unique properties, which stem from their itinerant carriers arranged in a kagome lattice. Here, we show that electronic structure of the prototypical kagome metal, , can be tailored by manipulating the breathing distortion of its kagome lattice with external pressure. The breathing distortion is suppressed around 15 GPa and reversed at higher pressures. These changes lead to a series of Lifshitz transitions that we detect using broadband and transient optical spectroscopy. Remarkably, the strength of the electronic correlations and the tendency to carrier localization are enhanced as the kagome network becomes more regular, suggesting that breathing distortion can be a unique control parameter for the microscopic regime of the kagome metals and their electron dynamics.

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Publication Details

Journal
Advanced Science
Published
2026-08-24
DOI
https://doi.org/10.1002/advs.77218
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure

M. Wenzel, Alexander A. Tsirlin, Olga Iakutkina, Alexej Pashkin et al.
Advanced Science
Topological Materials and Phenomena
article

High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure

M. Wenzel, Alexander A. Tsirlin, Olga Iakutkina, Alexej Pashkin, Stephan Winnerl, M. Helm, Hechang Lei, Martin Dressel, Davide Comboni, Francesco Capitani, Yuk Tai Chan, Ece Uykur, Michael Hanfland, Qi Wang, Marcos Vinicius Gonçalves-Faria
article en

Abstract

ABSTRACT The interplay between electronic correlations, density wave orders, and magnetism gives rise to several fascinating phenomena. In recent years, kagome metals have emerged as an excellent platform for investigating these unique properties, which stem from their itinerant carriers arranged in a kagome lattice. Here, we show that electronic structure of the prototypical kagome metal, , can be tailored by manipulating the breathing distortion of its kagome lattice with external pressure. The breathing distortion is suppressed around 15 GPa and reversed at higher pressures. These changes lead to a series of Lifshitz transitions that we detect using broadband and transient optical spectroscopy. Remarkably, the strength of the electronic correlations and the tendency to carrier localization are enhanced as the kagome network becomes more regular, suggesting that breathing distortion can be a unique control parameter for the microscopic regime of the kagome metals and their electron dynamics.

Advanced Science
University of Stuttgart (DE), Synchrotron soleil (FR), Helmholtz-Zentrum Dresden-Rossendorf (DE), European Synchrotron Radiation Facility (FR), ShanghaiTech University (CN), Technische Universität Dresden (DE), Renmin University of China (CN), Leipzig University (DE)
Deutsche Forschungsgemeinschaft, National Natural Science Foundation of China
Openalex Percentile: Top 12%
Topological Materials and Phenomena
DOIOpen Access PDFOpenAlex
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