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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BibTeX
@article{goncalvesfaria2026highpressure,
title = {{High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure}},
author = {Marcos Vinicius Gonçalves-Faria and Maxim Wenzel and Yuk Tai Chan and Olga Iakutkina and Francesco Capitani and Davide Comboni and Michael Hanfland and Qi Wang and Hechang Lei and Martin Dressel and Alexander Tsirlin and Alexej Pashkin and Stephan Winnerl and Manfred Helm and Ece Uykur},
journal = {Advanced Science},
year = {2026},
month = aug,
doi = {10.1002/advs.77218},
eprint = {2502.02123},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05795525v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure
AU - Marcos Vinicius Gonçalves-Faria
AU - Maxim Wenzel
AU - Yuk Tai Chan
AU - Olga Iakutkina
AU - Francesco Capitani
AU - Davide Comboni
AU - Michael Hanfland
AU - Qi Wang
AU - Hechang Lei
AU - Martin Dressel
AU - Alexander Tsirlin
AU - Alexej Pashkin
AU - Stephan Winnerl
AU - Manfred Helm
AU - Ece Uykur
PY - 2026
DA - 2026/08/24
JO - Advanced Science
DO - 10.1002/advs.77218
UR - https://hal.science/hal-05795525v1
AB - 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.
SN - 2198-3844
ER -