Andreev reflection in Euler materials
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Peer-reviewed
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jats:titleAbstract</jats:title> jats:pMany previous studies of Andreev reflection have demonstrated that unusual effects can occur in media which have a nontrivial bulk topology. Following this line of investigation, we study Andreev reflection by analysing a simple model of a bulk node with a generic winding number jats:italicn</jats:italic> > 0, where the even cases directly relate to topological Euler materials. We find that the magnitudes of the resultant reflection coefficients depend strongly on whether the winding is even or odd. Moreover this parity dependence is reflected in the differential conductance curves, which are highly suppressed for jats:italicn</jats:italic> even but not jats:italicn</jats:italic> odd. This gives a possible route through which the recently discovered Euler topology could be probed experimentally.</jats:p>
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Funder: Trinity College Cambridge
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1367-2630
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Marie-Curie Fellowship (101025315)