Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identification of Spin-Triplet Superconductivity through a
  Helical-Chiral Phase Transition in Sr$_2$RuO$_4$ Thin-Films   Despite much effort for over the two decades, the paring symmetry of a
Sr$_2$RuO$_4$ superconductor has been still unclear. In this Rapid
Communication, motivated by the recent rapid progress in fabrication techniques
for Sr$_2$RuO$_4$ thin-films, we propose a promising strategy for identifying
the spin-triplet superconductivity in the thin-film geometry by employing an
antisymmetric spin-orbit coupling potential and a Zeeman potential due to an
external magnetic field. We demonstrate that a spin-triplet superconducting
thin-film undergoes a phase transition from a helical state to a chiral state
by increasing the applied magnetic field. This phase transition is accompanied
by a drastic change in the property of surface Andreev bound states. As a
consequence, the helical-chiral phase transition, which is unique to the
spin-triplet superconductors, can be detected through a sudden change in a
tunneling conductance spectrum of a normal-metal/superconductor junction.
Importantly, our proposal is constructed by combining fundamental and rigid
concepts regarding physics of spin-triplet superconductivity.

26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga