Abstract
Substantial experimental investigation has provided evidence for spin-triplet pairing in diverse classes of materials and in a variety of artificial heterostructures. One of the fundamental challenges in this framework is how to manipulate the topological behavior of p-wave superconductors (PSC). In this work we investigate the magnetic field response of one-dimensional (1d) PSCs and we focus on the relation between the structure of the Cooper pair spin-configuration and the occurrence of topological phases with an enhanced number N of Majorana fermions per edge. The topological phase diagram, consisting of phases harboring Majorana modes, becomes significantly modified when one tunes the strength of the applied field, the direction of the d-vector and allows for long range hopping amplitudes in the 1d PSC. We find transitions between phases with different number N of Majorana fermions per edge and we show how they can be both induced by a variation of the hopping strength and a spin rotation of d.
| Original language | English |
|---|---|
| Journal | Physica B: Condensed Matter |
| Volume | 536 |
| Pages (from-to) | 730-733 |
| Number of pages | 4 |
| ISSN | 0921-4526 |
| DOIs | |
| Publication status | Published - 2018 |
Keywords
- Magnetic effects
- P-wave superconductors
- Topological phases