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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
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Impurity-Induced Magnetization of Graphene
Michał Inglot1, Tomasz Szczepański1
1Department of Physics and Medical Engineering, Rzeszów University of Technology, al. Powstańców Warszawy 6, 35-959 Rzeszow, Poland.
Materials (Basel, Switzerland)
|January 21, 2022
Summary
This study models impurity-induced magnetization in graphene, revealing localized spins create magnetic moments. Resonance energy levels and spatial magnetization distribution were calculated for non-magnetic impurities.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Graphene exhibits unique electronic properties near the Dirac point.
- Understanding impurity effects is crucial for tuning graphene's magnetic behavior.
- Localized spins on impurities can induce magnetization.
Purpose of the Study:
- To develop a model for impurity-induced magnetization in graphene.
- To analyze the role of localized impurity spins in graphene magnetization.
- To investigate the spatial distribution and energy levels of induced magnetization.
Main Methods:
- Solving the Schrödinger equation for massless fermions near the Dirac point.
- Utilizing Bessel functions to describe electron wavefunctions around a single impurity.
- Employing Green's function formalism to calculate graphene magnetization.
- Analyzing the dependence of resonance energy on impurity potential and interaction coupling.
Main Results:
- A model for impurity-induced graphene magnetization based on localized impurity spins was established.
- Resonance energy levels for non-magnetic impurities were determined.
- The spatial distribution of magnetization induced by a single impurity was obtained.
- The energy of resonance states was calculated as a function of impurity potential and coupling constant.
Conclusions:
- Localized impurity spins are a primary source of graphene magnetization.
- The model provides insights into the relationship between impurity characteristics and induced magnetic properties.
- Calculated resonance energies offer parameters for controlling graphene's magnetic response.
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