Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: All-electrical spectroscopy of topological phases in
  semiconductor-superconductor heterostructures   Semiconductors in the proximity of superconductors have been proposed to
support phases hosting Majorana bound states. When the systems undergo a
topological phase transition towards the Majorana phase, the spectral gap
closes, then reopens, and the quasiparticle band spin polarization is inverted.
We focus on two paradigmatic semiconductor-superconductor heterostructures and
propose an all-electrical spectroscopic probe sensitive to the spin inversion
at the topological transition. Our proposal relies on the indirect coupling of
a time-dependent electric field to the electronic spin due to the strong Rashba
spin-orbit coupling in the semiconductor. We analyze within linear response
theory the dynamical correlation functions and demonstrate that some components
of the susceptibility can be used to detect the nontrivial topological phases.

2
The categories of this paper are: math
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph