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Temperature-controlled spin filter and spin valve based on Fe-doped monolayer MoS2
Fei Zou1, Lin Zhu1, Gaoying Gao1
1School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China. linzh@hust.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|February 5, 2016
Summary
Iron-doped molybdenum disulfide exhibits thermal spin filtering and spin Seebeck effects. Researchers observed tunable thermal colossal magnetoresistances, paving the way for advanced spin caloritronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Spin caloritronics utilizes heat to generate spin currents.
- Molybdenum disulfide (MoS2) is a promising 2D material for electronic applications.
- Doping MoS2 can modify its electronic and thermal transport properties.
Purpose of the Study:
- To theoretically investigate the thermal transport properties of iron-doped MoS2.
- To explore the potential for spin filtering and spin Seebeck effects.
- To analyze thermal colossal magnetoresistance phenomena.
Main Methods:
- Density functional theory (DFT) calculations.
- Keldysh non-equilibrium Green's function (NEGF) approach.
- Analysis of band structures, transmission functions, and current spectra.
Main Results:
- A perfect spin filtering effect is induced by thermal gradients.
- A significant spin Seebeck effect is observed.
- Thermal colossal magnetoresistances, tunable with temperature, were discovered, transitioning between positive and negative values.
Conclusions:
- Iron-doped MoS2 exhibits unique thermal transport properties.
- The observed phenomena are elucidated by electronic structure and transport calculations.
- Findings support the development of efficient spin caloritronic devices.
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