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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Interaction induced staggered spin-orbit order in two-dimensional electron gas.
1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Physical Review Letters
|February 2, 2013
Summary
We introduce a new emergent phase in 2D Fermi gases: interaction-induced staggered spin-orbit order. This phase exhibits significant quasiparticle gapping and chiral states, with potential applications in spintronics.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
Background:
- Two-dimensional Fermi gases are crucial for understanding emergent quantum phenomena.
- Spin-orbit coupling (SOC) significantly influences electronic properties in low-dimensional systems.
Purpose of the Study:
- To propose and formulate a novel emergent phase in 2D Fermi gases: interaction-induced staggered spin-orbit order.
- To investigate the conditions leading to this new phase and its characteristics.
Main Methods:
- Theoretical formulation of Fermi surface instability driven by Rashba-type SOC and interactions.
- Analysis of spontaneous symmetry-breaking and quasiparticle gapping.
- Identification of BiAg(2) surface states as a potential experimental realization.
Main Results:
- Fermi surface nesting in 2D Fermi gases can induce a staggered spin-orbit density wave.
- This leads to significant quasiparticle gapping and the emergence of chiral electronic states.
- The discovered spin-orbit interaction is robust against perturbations and decoupled from charge excitations.
Conclusions:
- The interaction-induced staggered spin-orbit order represents a new emergent phase in 2D Fermi gases.
- BiAg(2) surface states are a promising platform for realizing and studying this phenomenon.
- The findings have implications for spintronics, spin caloritronics, and the spin-Hall effect.
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