Three-photon photoemission on metallic transition metal dichalcogenide NiTe2
Abstract
Three-photon photoemission (3PPE) signals on NiTe2 are observed for the first time upon ultraviolet excitations. In the energy range beyond two-photon excitations, an energy-momentum dispersive feature is clearly identified with characteristic light polarization dependence. Based on its dispersion, spectral width, as well as intensity as a function of the parallel momentum, this dispersive 3PPE feature could be ascribed to an image potential resonance overlapping with an unoccupied Ni 4s -Te 4d/5p bulk band in accordance with the electronic band structure. Our results underlie higher-order non-linear photoemission on metallic transition metal dichalcogenides and facilitate future ultrafast studies of coherent electron dynamics in anisotropic, two-dimensional systems.
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BibTeX
@misc{chiang2026threephoton,
title = {{Three-photon photoemission on metallic transition metal dichalcogenide NiTe$_2$}},
author = {Cheng-Tien Chiang and Mukesh Singh and Yu-Jhen Chuang and Chia-Nung Kuo and Prabesh Bista and Yu-Chan Lin and Chen-Bin Huang and Ming-Chiang Chung and Chin Shan Lue},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.28268},
eprint = {2609.28268},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.28268},
}
RIS
TY - UNPB
TI - Three-photon photoemission on metallic transition metal dichalcogenide NiTe_2
AU - Cheng-Tien Chiang
AU - Mukesh Singh
AU - Yu-Jhen Chuang
AU - Chia-Nung Kuo
AU - Prabesh Bista
AU - Yu-Chan Lin
AU - Chen-Bin Huang
AU - Ming-Chiang Chung
AU - Chin Shan Lue
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.28268
UR - https://arxiv.org/abs/2609.28268
AB - Three-photon photoemission (3PPE) signals on NiTe_2 are observed for the first time upon ultraviolet excitations. In the energy range beyond two-photon excitations, an energy-momentum dispersive feature is clearly identified with characteristic light polarization dependence. Based on its dispersion, spectral width, as well as intensity as a function of the parallel momentum, this dispersive 3PPE feature could be ascribed to an image potential resonance overlapping with an unoccupied Ni 4s -Te 4d/5p bulk band in accordance with the electronic band structure. Our results underlie higher-order non-linear photoemission on metallic transition metal dichalcogenides and facilitate future ultrafast studies of coherent electron dynamics in anisotropic, two-dimensional systems.
ER -