Symmetry-Selective Shift Current in Polar Multidomain Superlattices
Abstract
Periodic polar multidomain superlattices can act as symmetry-selective elements for shift-current generation. We demonstrate this using a two-dimensional Su-Schrieffer-Heeger model with prescribed multidomain configurations. The distinct full-supercell symmetries of periodic head-to-head and head-to-tail arrangements impose different constraints on the shift-current tensor and thereby select complementary nonlinear-response channels, as confirmed by numerical calculations. A direct comparison with equal-area averages of the constituent single-domain spectra shows that an independent-domain average does not reproduce the detailed multidomain spectra. A bond-resolved contribution analysis further clarifies the real-space origin of the multidomain response. Widening each domain from one to ten primitive cells leaves the selection rules intact. On the photon-energy grid used here, the allowed head-to-tail response changes sign and grows by about an order of magnitude. These results provide a theoretical framework for the symmetry-based design of anisotropic optical rectification in polar multidomain superlattices.
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BibTeX
@misc{kameda2026symmetryselective,
title = {{Symmetry-Selective Shift Current in Polar Multidomain Superlattices}},
author = {Tomoaki Kameda and Kosuke Nagashio and Katsunori Wakabayashi},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.05990},
eprint = {2611.05990},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.05990},
}
RIS
TY - UNPB
TI - Symmetry-Selective Shift Current in Polar Multidomain Superlattices
AU - Tomoaki Kameda
AU - Kosuke Nagashio
AU - Katsunori Wakabayashi
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.05990
UR - https://arxiv.org/abs/2611.05990
AB - Periodic polar multidomain superlattices can act as symmetry-selective elements for shift-current generation. We demonstrate this using a two-dimensional Su-Schrieffer-Heeger model with prescribed multidomain configurations. The distinct full-supercell symmetries of periodic head-to-head and head-to-tail arrangements impose different constraints on the shift-current tensor and thereby select complementary nonlinear-response channels, as confirmed by numerical calculations. A direct comparison with equal-area averages of the constituent single-domain spectra shows that an independent-domain average does not reproduce the detailed multidomain spectra. A bond-resolved contribution analysis further clarifies the real-space origin of the multidomain response. Widening each domain from one to ten primitive cells leaves the selection rules intact. On the photon-energy grid used here, the allowed head-to-tail response changes sign and grows by about an order of magnitude. These results provide a theoretical framework for the symmetry-based design of anisotropic optical rectification in polar multidomain superlattices.
ER -