Vortex lattice states of bilayer electron-hole fluids in quantizing magnetic fields
Mesoscale and Nanoscale Physics
2025-05-28 v2 Quantum Gases
Strongly Correlated Electrons
Abstract
We show that the ground state of a weakly charged two-dimensional electron-hole fluid in a strong magnetic field is a broken translation symmetry state with interpenetrating lattices of localized vortices and antivortices in the electron-hole-pair field. The vortices and antivortices carry fractional charges of equal sign but unequal magnitude and have a honeycomb lattice structure that contrasts with the triangular lattices of superconducting electron-electron-pair vortex lattices. We predict that increasing charge density or weakening magnetic field drives a vortex delocalization transition that would be signaled experimentally by an abrupt increase in counterflow transport resistance.
Keywords
Cite
@article{arxiv.2411.08810,
title = {Vortex lattice states of bilayer electron-hole fluids in quantizing magnetic fields},
author = {Bo Zou and Allan H. MacDonald},
journal= {arXiv preprint arXiv:2411.08810},
year = {2025}
}