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Fabry-Perot interferometry in Weyl semi-metals
Dibya Kanti Mukherjee1, Sumathi Rao1, Sourin Das2,3
1Harish-Chandra Research Institute, Homi Bhabha National Institute, Chhatnag Road, Jhunsi, Allahabad 211 019, India.
Summary
Electrical transport in Weyl semi-metals acts as a momentum-space interferometer. Driving these materials tunes the interference phase and conductance, offering new control over quantum phenomena.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Weyl semi-metals (WSMs) are topological materials with unique electronic properties.
- Understanding electron transport in WSMs is crucial for developing novel electronic devices.
Purpose of the Study:
- To interpret electrical transport in time-reversal and inversion symmetry broken WSMs as a momentum-space interferometer.
- To investigate the tunability of interference phenomena in WSMs via external driving.
Main Methods:
- Theoretical modeling of minimal WSM systems with two and four Weyl nodes.
- Analysis of momentum-space interference effects on electrical transport.
- Investigating the impact of driving on conductance oscillations.
Main Results:
- Electrical transport in a two-node WSM model is analogous to a momentum-space interferometer.
- Anisotropic interference phase depends on the distance between Weyl nodes.
- A four-node WSM model with broken inversion symmetry effectively creates two such interferometers.
- Driving WSMs tunes the interference phase and induces conductance oscillations.
Conclusions:
- The WSM system can be viewed as a tunable quantum interferometer.
- Control over interference phenomena in WSMs can be achieved by external driving.
- These findings offer pathways for manipulating quantum transport in topological materials.
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