Hybridization-Induced Enhancement of the Thermoelectric Response in the Kagome Material CsCr6Sb6
Abstract
Flat bands in kagome lattices provide a prominent route to strongly correlated electronic states. Here we report charge and thermal transport measurements on single crystals of CsCr6Sb6, a kagome Kondo system arising from the hybridization between flat and dispersive bands. The Seebeck coefficient and Nernst signal increase rapidly below TF∼70 K, concomitant with the emergence of short-range antiferromagnetic correlations and flat-band resonance. The Nernst coefficient in the intermediate-temperature range of ∼30−80 K further follows the universal scaling reported for prototypical heavy-fermion compounds, consistent with the development of strongly renormalized quasiparticles associated with hybridization. Both the Seebeck and Nernst responses reach extrema at a lower temperature Tp∼20−25 K, where phonon drag and correlated quasiparticles may both contribute. These results reveal a hybridization-induced enhancement of the thermoelectric response and establish CsCr6Sb6 as a kagome platform for probing flat-band-derived Kondo physics through thermoelectric transport.
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BibTeX
@misc{zhang2026hybridizationinduced,
title = {{Hybridization-Induced Enhancement of the Thermoelectric Response in the Kagome Material CsCr$_6$Sb$_6$}},
author = {Hongye Zhang and Boqin Song and Aifeng Wang and Yisheng Chai and Xiaoyuan Zhou and Ying Zhu and Tianping Ying and Mingquan He},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.29366},
eprint = {2610.29366},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.29366},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Hybridization-Induced Enhancement of the Thermoelectric Response in the Kagome Material CsCr_6Sb_6
AU - Hongye Zhang
AU - Boqin Song
AU - Aifeng Wang
AU - Yisheng Chai
AU - Xiaoyuan Zhou
AU - Ying Zhu
AU - Tianping Ying
AU - Mingquan He
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2610.29366
UR - https://arxiv.org/abs/2610.29366
AB - Flat bands in kagome lattices provide a prominent route to strongly correlated electronic states. Here we report charge and thermal transport measurements on single crystals of CsCr_6Sb_6, a kagome Kondo system arising from the hybridization between flat and dispersive bands. The Seebeck coefficient and Nernst signal increase rapidly below T_F∼70 K, concomitant with the emergence of short-range antiferromagnetic correlations and flat-band resonance. The Nernst coefficient in the intermediate-temperature range of ∼30−80 K further follows the universal scaling reported for prototypical heavy-fermion compounds, consistent with the development of strongly renormalized quasiparticles associated with hybridization. Both the Seebeck and Nernst responses reach extrema at a lower temperature T_p∼20−25 K, where phonon drag and correlated quasiparticles may both contribute. These results reveal a hybridization-induced enhancement of the thermoelectric response and establish CsCr_6Sb_6 as a kagome platform for probing flat-band-derived Kondo physics through thermoelectric transport.
ER -