Related Experiment Video
Updated: Aug 22, 2026

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Vanishing Hall resistance at high magnetic field in a double-layer two-dimensional electron system
M Kellogg1, J P Eisenstein, L N Pfeiffer
1California Institute of Technology, Pasadena, California 91125, USA.
Abstract:
At total Landau level filling factor nu(tot)=1 a double-layer two-dimensional electron system with small interlayer separation supports a collective state possessing spontaneous interlayer phase coherence. This state exhibits the quantized Hall effect when equal electrical currents flow in parallel through the two layers. In contrast, if the currents in the two layers are equal, but oppositely directed, both the longitudinal and Hall resistances of each layer vanish in the low-temperature limit. This finding supports the prediction that the ground state at nu(tot)=1 is an excitonic superfluid.
Related Concept Videos
The Hall Effect
Magnetic Fields
A magnetic field is defined by the force that a charged particle experiences...
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current
Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Magnetostatic Boundary Conditions
The Electrical Double Layer