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Related Experiment Video

Updated: Jun 9, 2025

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

Colossal room-temperature non-reciprocal Hall effect.

Lujin Min^1,2, Yang Zhang³, Zhijian Xie⁴

¹Department of Physics, Pennsylvania State University, University Park, PA, USA.

Nature Materials

|October 21, 2024

Summary

This summary is machine-generated.

Researchers discovered a new transverse non-reciprocal Hall effect in platinum devices. This effect shows a quadratic current-voltage relationship and can be used for broadband frequency mixing, with applications in terahertz technology.

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Area of Science:

Condensed Matter Physics
Quantum Materials
Nanotechnology

Background:

Non-reciprocal charge transport is crucial for quantum symmetry and applications.
Previous studies focused on longitudinal non-reciprocity with small resistance changes.

Purpose of the Study:

To report a novel transverse non-reciprocal transport phenomenon.
To investigate its characteristics and potential applications.

Main Methods:

Fabrication of microscale Hall devices using focused ion beam deposition of platinum (Pt) on silicon substrates.
Characterization of the transverse non-reciprocal Hall effect and its current-voltage properties.

Main Results:

Observation of a transverse non-reciprocal Hall effect with a quadratic current-voltage characteristic.
Demonstration of divergent non-reciprocity originating from asymmetric scattering in textured Pt nanoparticles.
Propagation of the effect to adjacent conductors (Au, NbP) via Hall current injection.
Facilitation of broadband frequency mixing due to the pronounced non-reciprocal Hall effect.

Conclusions:

Validation of the non-reciprocal Hall effect concept.
Potential applications in terahertz communication, imaging, and energy harvesting.
Opens new avenues for exploring quantum phenomena and device functionalities.