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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Edge Reconstruction of a Time-Reversal Invariant Insulator: Compressible-Incompressible Stripes
Udit Khanna1,2, Yuval Gefen1, Ora Entin-Wohlman2
1Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
Physical Review Letters
|May 20, 2022
Summary
Researchers explored a 2D trivial insulator
Area of Science:
- Condensed matter physics
- Materials science
Background:
- Two-dimensional (2D) topological electronic insulators exhibit gapless edge modes crucial for low-energy dynamics.
- Existing research primarily focuses on quantum Hall phases and time-reversal invariant topological insulators.
Purpose of the Study:
- Investigate edge properties of a 2D topologically trivial insulating phase.
- Examine the influence of electronic interactions and confining potential steepness on edge behavior.
Main Methods:
- Theoretical study of a 2D system.
- Analysis of edge states under varying interaction strengths and potential gradients.
Main Results:
- Alternating compressible and incompressible stripes emerge at the edge for smooth confining potentials.
- Gapless edge modes appear, potentially leading to finite edge conductance.
- Incompressible stripes exhibit charge density wave ordering, breaking translational invariance.
Conclusions:
- Findings suggest a novel non-topological metal-insulator transition in clean 2D systems.
- The emergence of edge stripes and modes offers new avenues for understanding transport phenomena.
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