Dynamical Tunneling Blockade in Layer-Pseudospin Ferromagnets
Abstract
Double-layer systems with narrow or flat electronic bands may exhibit spontaneous interlayer coherence, described by a layer-pseudospin ferromagnetic order parameter. In modern realizations of layer-pseudospin ferromagnets, the electrons carry additional valley degeneracies, endowing each layer with a valley-pseudospin degree of freedom. We study their nonequilibrium steady states driven by a static interlayer voltage bias in the presence of interlayer tunneling. While in the low-bias regime, the system is in a static state with parallel valley pseudospins between the two layers, we show that in the high-bias regime, the dynamical precession of the layer-pseudospin stabilizes the valley pseudospins in the antiparallel configuration, strongly suppressing the interlayer tunneling. This dynamical tunneling blockade leads to an absence of ac current and a sharp drop of the dc tunneling current to a tiny value, in stark contrast to conventional quantum Hall double layers.
Related
- Optical detection and manipulation of pseudospin orders in Wigner crystals
- Universal Critical Jump for Inverse-Square Ising Ferromagnets
- Optical angular momentum and pseudospin-orbit coupling in photonic graphene
- Spin textures at the Fermi surface of ferromagnets and associated torque
- Spin Rectification in Series and Parallel Networks of Ferromagnets
BibTeX
@misc{kong2026dynamical,
title = {{Dynamical Tunneling Blockade in Layer-Pseudospin Ferromagnets}},
author = {Lingxian Kong and Yuta Murakami and Ryuichi Shindou and Zhiyuan Sun},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.28760},
eprint = {2610.28760},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.28760},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Dynamical Tunneling Blockade in Layer-Pseudospin Ferromagnets
AU - Lingxian Kong
AU - Yuta Murakami
AU - Ryuichi Shindou
AU - Zhiyuan Sun
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.28760
UR - https://arxiv.org/abs/2610.28760
AB - Double-layer systems with narrow or flat electronic bands may exhibit spontaneous interlayer coherence, described by a layer-pseudospin ferromagnetic order parameter. In modern realizations of layer-pseudospin ferromagnets, the electrons carry additional valley degeneracies, endowing each layer with a valley-pseudospin degree of freedom. We study their nonequilibrium steady states driven by a static interlayer voltage bias in the presence of interlayer tunneling. While in the low-bias regime, the system is in a static state with parallel valley pseudospins between the two layers, we show that in the high-bias regime, the dynamical precession of the layer-pseudospin stabilizes the valley pseudospins in the antiparallel configuration, strongly suppressing the interlayer tunneling. This dynamical tunneling blockade leads to an absence of ac current and a sharp drop of the dc tunneling current to a tiny value, in stark contrast to conventional quantum Hall double layers.
ER -