Majorana double nanowires in the presence of magnetic field, interactions, and disorder

We study double Rashba nanowires (NWs) coupled to an s-wave superconductor,
which has been recently proposed as a versatile platform to generate Kramers pairs
of Majorana bound states in the absence of magnetic field [1]. We also analyze
the effects of electron-electron interactions and disorder on the system and find that
the interactions drive the system into the topological phase [2]. We further consider an
external magnetic field along the NWs and demonstrate that the setup exhibits a new
previously overlooked Majorana phase that emerges at low magnetic field [3]. Also we
demonstrate the charge and spin signatures of topological superconductivity in the double
NWs setup.

[1] J. Klinovaja and D. Loss, Phys. Rev. B 90, 045118 (2014).
[2] M. Thakurathi et al, Phys. Rev. B 97, 045415 (2018).
[3] C. Schrade et al, Phys. Rev. B 96, 035306 (2017).