Wigner islands with electrons over helium

Abstract

We present here the first experimental study of Wigner islands formed by electrons floating over helium. Electrons are trapped electrostatically in a mesoscopic structure covered with a helium film, behaving as a quantum dot. By removing electrons one by one, we are able to find the addition spectrum, i.e. the energy required to add (or extract) one electron from the trap with occupation number $N$. Experimental addition spectra are compared with Monte Carlo simulations for the actual trap geometry, confirming the ordered state of electrons over helium in the island.

12 pages, 13 figures, draft paper

References in corpus (4)

• Classical and quantum Coulomb crystals
• Incipient Wigner Localization in Circular Quantum Dots
• Interaction-Induced Strong Localization in Quantum Dots
• Trapping electrons in electrostatic traps over the surface of helium

Cited by in corpus (20)

• Vortices in quantum droplets: Analogies between boson and fermion systems
• Spectroscopy of Wigner molecules on superfluid helium using a superconducting resonator
• Coupling an ensemble of electrons on superfluid helium to a superconducting circuit
• Contrasting Energy Scales of the Reentrant Integer Quantum Hall States
• How spherical plasma crystals form
• Phase diagram of bilayer electron-hole plasmas
• Structure and Phase transitions of Yukawa balls
• Thomson rings in a disk
• Self-organization of charged particles in circular geometry
• Transport Measurements of Strongly-Correlated Electrons on Helium in a Classical Point-Contact Device
• String structures in driven 3D complex plasma clusters
• Buckling transitions and clock order of two-dimensional Coulomb crystals
• Topological defect motifs in two-dimensional Coulomb clusters
• Formation of defects in multirow Wigner crystals
• Configurational entropy of Wigner crystals
• Wigner Crystallization in Two Dimensions: Evolution from Long- to Short-Ranged Forces
• First Study of Intersubband Absorption in Electrons on Helium under Quantizing Magnetic Fields
• Wigner crystal in snaked nanochannels
• Pauli crystals -- interplay of symmetries
• The Wigner localization of interacting electrons in a one-dimensional harmonic potential