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  • Title: Electrical manipulation and measurement of spin properties of quantum spin Hall edge states.
    Author: Väyrynen JI, Ojanen T.
    Journal: Phys Rev Lett; 2011 Feb 18; 106(7):076803. PubMed ID: 21405531.
    Abstract:
    We study the effects of a gate-controlled Rashba spin-orbit coupling to quantum spin Hall edge states in HgTe quantum wells. A uniform Rashba coupling can be employed in tuning the spin orientation of the edge states while preserving the time-reversal symmetry. We introduce a sample geometry where the Rashba coupling can be used in probing helicity by purely electrical means without requiring spin detection, application of magnetic materials or magnetic fields. In the considered setup a tilt of the spin orientation with respect to the normal of the sample leads to a reduction in the two-terminal conductance with current-voltage characteristics and temperature dependence typical of Luttinger liquid constrictions.
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