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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
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Dissipationless Spin-Charge Conversion in Excitonic Pseudospin Superfluid.
Yeyang Zhang1, Ryuichi Shindou1
1International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.
Physical Review Letters
|February 25, 2022
Summary
We introduce a novel, dissipationless method for spin-charge conversion using an excitonic pseudospin superfluid. This mechanism in electron-hole double-layer systems offers a new pathway for spintronics applications.
Area of Science:
- Spintronics
- Condensed Matter Physics
- Quantum Optics
Background:
- Spin-charge conversion is crucial for spintronics but current methods like the inverse spin Hall effect are dissipative.
- Dissipative processes limit the efficiency and applicability of spintronic devices.
Purpose of the Study:
- To propose and demonstrate a novel, dissipationless spin-charge conversion mechanism.
- To explore the potential of excitonic pseudospin superfluids for spintronics.
Main Methods:
- Theoretical modeling of an electron-hole double-layer system.
- Investigating the role of magnetic exchange fields in lifting exciton degeneracy.
- Deriving spin-charge coupled Josephson equations from a coupled quantum-dot model.
Main Results:
- Demonstrated a dissipationless spin-charge conversion mechanism via excitonic pseudospin superfluid condensation.
- Showcased how magnetic exchange fields induce singlet-triplet hybridization and symmetry breaking.
- Established spin-charge coupled superflow in the system.
Conclusions:
- The proposed excitonic pseudospin superfluid offers a dissipationless route for spin-charge conversion.
- This mechanism presents a promising avenue for developing next-generation, low-dissipation spintronic devices.
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