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Home > Press > Quantum quirk yields giant magnetic effect, where none should exist: Study opens window into the landscape of extreme topological matter
Rice University theoretical physicists (from left) Hsin-Hua Lai, Qimiao Si and Sarah Grefe worked with experimental collaborators at Vienna University of Technology to understand topological features of a nonmagnetic Weyl-Kondo semimetal allowed it to produce a giant Hall effect in the absence of a magnetic field.
CREDIT
Photo by Jeff Fitlow/Rice University
Abstract:
In a twist befitting the strange nature of quantum mechanics, physicists have discovered the Hall effect a characteristic change in the way electricity is conducted in the presence of a magnetic field in a nonmagnetic quantum material to which no magnetic field was applied.
Exotic Metal Found to Exhibit Giant Hall Effect Without any Magnetic Field
Written by AZoMFeb 23 2021
A magnetic field can deflect an electric current. In the case of conducting materials, this results in what is called the Hall effect, which is usually used to quantify magnetic fields.
The material behaves as if magnetic monopoles were present. Image Credit: TU Wien.
Scientists at TU Wien, working with researchers from the Paul Scherrer Institute (Switzerland), McMaster University (Canada) and Rice University (United States), have now achieved a fascinating discovery: an exotic metal composed of cerium, palladium and bismuth was investigated and the material was found to produce a giant Hall effect, in the complete absence of any magnetic field.
Electric current is deflected by a magnetic field - this leads to the so-called Hall effect. A surprising discovery has now been made at TU Wien: an exotic metal was examined and a giant Hall effect was found to be produced by the material, in the total absence of any magnetic field.