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|Title: ||Andreev spectroscopy of Majorana states in topological superconductors with multipocket Fermi surfaces|
|Authors: ||Silva, Ana|
|Keywords: ||multiband superconductivity|
|Issue Date: ||May-2015|
|Publisher: ||Europhysics Letters|
|Citation: ||EPL 110, 37008 (2015)|
|Abstract: ||The topological properties of a multiband
in two dimensions are studied,
when the latter is obtained by introducing electron pairing in an
otherwise topological insulator.
The type of pairing, doping and Fermi surface topology play an essential
Considering the Andreev reflection problem,
we use a previously developed
quantum waveguide theory for multiorbital systems
and find that, when the Fermi surface has several pockets,
this theory retrieves the correct number of Majorana fermion states
as predicted by the topological index.
By varying band structure parameters, the Fermi surface topology of the normal phase
can be made to change, whereby the number of Majorana modes also varies.
We calculate the effect of such
transitions on the Andreev differential conductance.|
|Appears in Collections:||FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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