Related Experiment Video
Updated: Jan 15, 2026

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
Published on: April 19, 2021
Electrically controlled interlayer trion fluid in electron-hole bilayers
Ruishi Qi1,2, Qize Li1, Zuocheng Zhang1
1Department of Physics, University of California, Berkeley, CA, USA.
Researchers created an electrically controlled fluid of trions (three-particle complexes) in van der Waals heterostructures. This platform allows tuning between exciton and trion fluids, offering new insights into quantum correlated phases.
Area of Science:
- Condensed Matter Physics
- Quantum Mechanics
- Materials Science
Background:
- Quantum electron-hole (e-h) fluids exhibit complex correlated phases due to Coulomb interactions.
- Excitons, trions, and biexcitons are examples of multiparticle charge complexes.
- Van der Waals heterostructures provide a platform for studying novel quantum phenomena.
Purpose of the Study:
- To experimentally realize and investigate an electrically controlled interlayer trion fluid.
- To explore the tunable nature of correlated phases in e-h bilayers.
- To demonstrate a platform for studying Bose-Fermi mixtures.
Main Methods:
- Fabrication of van der Waals heterostructures.
- Utilizing electrostatic gating for electrical control.
- Spectroscopic analysis of electron-hole interactions and bound states.
Main Results:
- Spontaneous formation of three-particle trion bound states (1e-2h and 2e-1h) in strongly coupled e-h bilayers.
- Observation of a spin-singlet configuration in 1e-2h trions with a spin gap of ~1 meV.
- Continuous tuning of the system into exciton fluid, trion fluid, exciton-trion mixtures, or trion-charge mixtures via electrostatic gating.
Conclusions:
- An electrically tunable interlayer trion fluid has been experimentally realized.
- This system serves as a versatile platform for investigating correlated quantum phases.
- The ability to tune between different fluid phases opens avenues for studying Bose-Fermi mixtures.
More Related Videos
10:36Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
Published on: April 12, 2018
09:54Multifunctional, Micropipette-based Method for Incorporation And Stimulation of Bacterial Mechanosensitive Ion Channels in Droplet Interface Bilayers
Published on: November 19, 2015
Related Concept Videos
Fluid Mosaic Model
Electrostatic Boundary Conditions in Dielectrics
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
Intermolecular Forces
Field Effect Transistor
Biasing of FET
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
Ion Channels
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...