Hydrogen-induced modification of the local charge density in MnSb2Te4
Abstract
We investigate the effects of ionic hydrogen (H+) intake on the occupied and unoccupied states of MnSb2Te4, a van der Waals magnetic material. Using angle-resolved photoemission spectroscopy (ARPES) and time-resolved ARPES, combined with resonant and core level photoemission, we reveal that hydrogen binds near specific lattice sites, locally redistributing charge density and reshaping the valence band spectral weight. While the band gap and picosecond carrier dynamics show only minor changes upon hydrogenation, the conduction band exhibits a striking stoichiometry-dependent response. These findings indicate that hydrogen interacts strongly with the intrinsic defects in the lattice, acting as a selective dopant in MnSb2Te4. Our work provides a spectroscopic basis for using hydrogen as a tool for the control of the electronic and magnetic properties in layered 2D materials.
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BibTeX
@misc{samioti2026hydrogeninduced,
title = {{Hydrogen-induced modification of the local charge density in MnSb$_2$Te$_4$}},
author = {Kyriaki Samioti and Weiyan Qi and Stefano Ponzoni and Antonio Salame and Entela Buzi and Afrin Nahar Tamanna and Ayesha Lakra and Steven Francis Udaundo and Ding Pei and Pavel Dudin and Marta Zonno and François Bertran and Amina Taleb-Ibrahimi and Lia Krusin-Elbaum and Luca Perfetti and Evangelos Papalazarou and Marino Marsi},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.04649},
eprint = {2611.04649},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.04649},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Hydrogen-induced modification of the local charge density in MnSb_2Te_4
AU - Kyriaki Samioti
AU - Weiyan Qi
AU - Stefano Ponzoni
AU - Antonio Salame
AU - Entela Buzi
AU - Afrin Nahar Tamanna
AU - Ayesha Lakra
AU - Steven Francis Udaundo
AU - Ding Pei
AU - Pavel Dudin
AU - Marta Zonno
AU - François Bertran
AU - Amina Taleb-Ibrahimi
AU - Lia Krusin-Elbaum
AU - Luca Perfetti
AU - Evangelos Papalazarou
AU - Marino Marsi
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.04649
UR - https://arxiv.org/abs/2611.04649
AB - We investigate the effects of ionic hydrogen (H^+) intake on the occupied and unoccupied states of MnSb_2Te_4, a van der Waals magnetic material. Using angle-resolved photoemission spectroscopy (ARPES) and time-resolved ARPES, combined with resonant and core level photoemission, we reveal that hydrogen binds near specific lattice sites, locally redistributing charge density and reshaping the valence band spectral weight. While the band gap and picosecond carrier dynamics show only minor changes upon hydrogenation, the conduction band exhibits a striking stoichiometry-dependent response. These findings indicate that hydrogen interacts strongly with the intrinsic defects in the lattice, acting as a selective dopant in MnSb_2Te_4. Our work provides a spectroscopic basis for using hydrogen as a tool for the control of the electronic and magnetic properties in layered 2D materials.
ER -