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Updated: Jan 10, 2026
10:36
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
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Interactions-controlled magnetotransport in two-dimensional massless-massive fermion mixtures
Yuping Huang1,2, D Eliseev3, Vadim Mikhailovich Kovalev3
1Laboratory of 2D Optoelectronics and Nanoelectronics (L2DON), State Key Laboratory of Quantum Functional Materials, Department of Materials Science and Engineering, Southern University of Science and Technology, Xueyuan Blvd, Shenzhen 1088, People's Republic of China.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 28, 2025
Summary
Interactions between Dirac and massive holes in 2D semimetals influence resistivity. A theoretical model reveals how these interactions, dependent on temperature and magnetic fields, affect magnetoconductivity and magnetoresistivity.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Theoretical Physics
Background:
- Two types of holes, Dirac (massless) and massive, exist in 2D semimetals like HgTe.
- External magnetic fields and temperature influence their interactions and electrical properties.
Purpose of the Study:
- To develop a theoretical model for magnetoconductivity and resistivity in 2D semimetals with both Dirac and massive holes.
- To investigate the role of interparticle interactions on transport properties.
Main Methods:
- Theoretical modeling of particle interactions in a 2D semimetal (HgTe).
- Analysis of magnetoconductivity, magnetoresistivity, and Hall effect under magnetic fields and varying temperatures.
Main Results:
- Dirac holes alone induce temperature-dependent magnetoconductivity (T4ln(1/T) or T2).
- Interactions between Dirac and massive holes contribute to magnetoconductivity, magnetoresistivity, and Hall effect.
- Strong magnetic fields reduce interaction effects on magnetoresistivity.
Conclusions:
- The coexistence of Dirac and massive holes significantly impacts transport properties.
- Interparticle interactions are crucial for understanding the behavior of these 2D semimetals.
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