Interacting two helical edge modes in quantum spin Hall systems
Yukio Tanaka, Naoto Nagaosa
TL;DR
This paper theoretically investigates the interactions between two helical edge modes in quantum spin Hall systems, revealing a novel inter-edge correlated liquid with enhanced density wave and superconductivity correlations.
Contribution
It introduces a new type of inter-edge correlated liquid without a spin gap, highlighting stronger correlations than in spinful electrons.
Findings
Discovery of a new inter-edge correlated liquid (IECL)
Enhanced density wave and superconductivity correlations
Potential experimental signatures discussed
Abstract
We study theoretically the two interacting one-dimensional helical modes at the edges of the quantum spin Hall systems. A new type of inter-edge correlated liquid (IECL) without the spin gap is found. This liquid shows the diverging density wave (DW) and superconductivity (SC) correlations much stronger than those of the spinfull electrons. Possible experimental observations are also discussed.
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