Intrinsic Floquet generation and 1 / I quantum oscillations in a sliding charge-density wave
- 1Institute of Physics, Chinese Academy of Sciences
Abstract
Recent experiments [] revealed striking inverse-current ( 1 / I ) quantum oscillations in quasi-one-dimensional charge-density-wave (CDW) insulators and proposed an intrinsic Floquet sideband mechanism arising from the sliding condensate. Here, we develop the complete theoretical framework underlying this proposal. We provide an exact Floquet diagonalization of the uniformly sliding CDW problem, yielding split gap edges and a ladder of Floquet sidebands with explicit unitary transformation and spectral functions. Using this exact solution, we formulate weak-probe tunneling spectroscopy and demonstrate that the local Floquet spectrum naturally yields 1 / I oscillations as successive sideband edges cross a fixed contact chemical potential. The measured period fixes N eff ε ≃ 4.80 eV , where ε is the local contact-to-gap-edge offset. Combining this relation with the experimentally resolved low-temperature oscillations constrains the effective coherent channel count to be at most of order 10 3 , far below the geometric estimate N geom ∼ 3 × 10 4 , while ε = 10 meV gives the representative value N eff ≃ 480 . This reduced coherent scale is naturally realized by a spatially nonuniform percolating network, but does not require N eff independent end-to-end wires. Furthermore, using a segmented multiterminal model, we show that inelastic phase-slip dephasing near the contacts explains the experimentally observed suppression of oscillation visibility on outer voltage probes. Finally, we contrast the persistent-current-driven multiterminal geometry with a homogeneous voltage-biased two-terminal reference calculation. Our results establish a nonequilibrium transport framework for the observed 1 / I oscillations and identify an observability condition in which the Floquet spacing must exceed collective and quasiparticle broadening.
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BibTeX
@article{zhou2026intrinsic,
title = {{Intrinsic Floquet generation and 1 / I quantum oscillations in a sliding charge-density wave}},
author = {Yi Zhou},
journal = {Physical Review Research},
year = {2026},
month = oct,
doi = {10.1103/5tjw-9z42},
url = {https://link.aps.org/doi/10.1103/5tjw-9z42},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Intrinsic Floquet generation and 1 / I quantum oscillations in a sliding charge-density wave
AU - Yi Zhou
PY - 2026
DA - 2026/10/14
JO - Physical Review Research
DO - 10.1103/5tjw-9z42
UR - https://link.aps.org/doi/10.1103/5tjw-9z42
AB - Recent experiments [] revealed striking inverse-current ( 1 / I ) quantum oscillations in quasi-one-dimensional charge-density-wave (CDW) insulators and proposed an intrinsic Floquet sideband mechanism arising from the sliding condensate. Here, we develop the complete theoretical framework underlying this proposal. We provide an exact Floquet diagonalization of the uniformly sliding CDW problem, yielding split gap edges and a ladder of Floquet sidebands with explicit unitary transformation and spectral functions. Using this exact solution, we formulate weak-probe tunneling spectroscopy and demonstrate that the local Floquet spectrum naturally yields 1 / I oscillations as successive sideband edges cross a fixed contact chemical potential. The measured period fixes N eff ε ≃ 4.80 eV , where ε is the local contact-to-gap-edge offset. Combining this relation with the experimentally resolved low-temperature oscillations constrains the effective coherent channel count to be at most of order 10 3 , far below the geometric estimate N geom ∼ 3 × 10 4 , while ε = 10 meV gives the representative value N eff ≃ 480 . This reduced coherent scale is naturally realized by a spatially nonuniform percolating network, but does not require N eff independent end-to-end wires. Furthermore, using a segmented multiterminal model, we show that inelastic phase-slip dephasing near the contacts explains the experimentally observed suppression of oscillation visibility on outer voltage probes. Finally, we contrast the persistent-current-driven multiterminal geometry with a homogeneous voltage-biased two-terminal reference calculation. Our results establish a nonequilibrium transport framework for the observed 1 / I oscillations and identify an observability condition in which the Floquet spacing must exceed collective and quasiparticle broadening.
SN - 2643-1564
ER -