Skip to content
DraconiticResearch
Search Sources API
185,139 studies31 sourcesUpdated 5 min ago
PreprintarXiv licencearXiv

Fractal Confinement and Magnetic Self-sabotage of Current Flow: Electrons Near the Metal-insulator Crossover in a 2D δ-layer

  • Xinghai Zhang
  • Matthew S. Foster
  • Markus Mueller
Open at sourcePDFDOICite

Abstract

We study low-T transport and itinerant magnetism in 2D δ-doped semiconductors. Large-scale Hartree-Fock calculations with random hoppings and repulsion U0 reveal two transport regimes near a critical density. The conductivity σ(T) initially increases as T drops below U0 / 10. However, at T ∼ U0/100, a tiny density of magnetic moments forms, driving an insulating downturn. Fractal wavefunctions locally amplify magnetic interactions, initially concentrating currents into branched filaments, but ultimately choking them off via dynamic SU(2) symmetry breaking.

Related

  1. Optical control of electrons in a Floquet topological insulator
    Daniel Lesko, Tobias Weitz, Simon Wittigschlager +4
    Nature PhysicsPeer-reviewedCC BYFull text15 citedAtomic, molecular & optical physicsOpenAlex
  2. Solar Magnetic Configuration Control over Radiation Belt Electrons
    Ahmad Lalti, Jonathan Rae, Clare Watt +2
    arXivPreprintCC BY 4.0Full textPlanetary science & exoplanetsSolar & stellar physicsarXiv
  3. Anomalous Metallic States at Magnetic Interfaces in an Antiferromagnetic Topological Insulator Candidate DyPtBi with Ferroquadrupolar Order
    Kentaro Ueda, Hiraku Saito, Zen Ogame +6
    Physical Review XPeer-reviewedCC BY 4.0Atomic, molecular & optical physicsAPS
  4. Dynamics of Vortex Electrons in a Uniform Magnetic Field Across Nonrelativistic and Relativistic Regimes
    Yujian Lin, Zhigang Bu, Shiyu Liu +2
    arXivPreprintCC BY 4.0Full textPlasma physicsarXiv
  5. Effect of Annealing on Maze Domains in Topological Insulator - Magnetic Multilayer Heterostructures
    Benjamin A. Brereton, Soumyarup Hait, Christy J. Kinane +6
    arXivPreprintCC BY 4.0Full textCondensed matterarXiv

Cite

BibTeXRIS
BibTeX
@misc{zhang2026fractal,
  title = {{Fractal Confinement and Magnetic Self-sabotage of Current Flow: Electrons Near the Metal-insulator Crossover in a 2D $δ$-layer}},
  author = {Xinghai Zhang and Matthew S. Foster and Markus Mueller},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.28739},
  eprint = {2608.28739},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.28739},
}
RIS
TY  - UNPB
TI  - Fractal Confinement and Magnetic Self-sabotage of Current Flow: Electrons Near the Metal-insulator Crossover in a 2D δ-layer
AU  - Xinghai Zhang
AU  - Matthew S. Foster
AU  - Markus Mueller
PY  - 2026
DA  - 2026/08/28
PB  - arXiv
DO  - 10.48550/arxiv.2608.28739
UR  - https://arxiv.org/abs/2608.28739
AB  - We study low-T transport and itinerant magnetism in 2D δ-doped semiconductors. Large-scale Hartree-Fock calculations with random hoppings and repulsion U_0 reveal two transport regimes near a critical density. The conductivity σ(T) initially increases as T drops below U_0 / 10. However, at T ∼ U_0/100, a tiny density of magnetic moments forms, driving an insulating downturn. Fractal wavefunctions locally amplify magnetic interactions, initially concentrating currents into branched filaments, but ultimately choking them off via dynamic SU(2) symmetry breaking.
ER  -