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Conductance properties ofα-T3Corbino disks
1Department of Physics, Indian Institute of Technology-Guwahati, Guwahati 781039, India.
Summary
This study explores electron transport in an α-T3 lattice Corbino disk, revealing tunable Aharonov-Bohm oscillations and complex quantum interference effects influenced by various parameters. The findings highlight potential for quantum Hall current generation and unique electron transport phenomena.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Transport
Background:
- Investigating novel lattice structures like the α-T3 lattice is crucial for understanding advanced electronic properties.
- Corbino disk geometry provides a unique platform for studying electron transport phenomena under magnetic flux.
- Flat bands in electronic systems can lead to exotic quantum phenomena and novel device applications.
Purpose of the Study:
- To analytically solve the Dirac-Weyl equation for an α-T3 lattice Corbino disk.
- To compute carrier transmission probability and analyze conductance features.
- To investigate the influence of magnetic flux, doping, and lattice parameters on electron transport.
Main Methods:
- Exact analytical solution of the stationary Dirac-Weyl equation.
- Calculation of transmission probability and conductance.
- Parameter-dependent analysis of Aharonov-Bohm oscillations and quantum interference.
Main Results:
- Observed periodic Aharonov-Bohm oscillations in conductance, indicating electron pump behavior.
- Demonstrated complex quantum interference effects, including higher harmonic modes and split-peak structures, especially for smaller α values.
- Identified distinct transport regimes (Poissonian, pseudo-diffusive, ballistic) based on the Fano factor and α parameter.
Conclusions:
- The α-T3 lattice Corbino disk is a promising system for studying quantum Hall current and Aharonov-Bohm oscillations in flat band systems.
- Electron transport is highly sensitive to doping, magnetic flux, and the α parameter, offering tunability.
- The study highlights unique quantum interference phenomena and transport regimes distinct from graphene disks.
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