2021/03/01 by Alestin Mawrie, Mawrie, Alestin
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #High-pressure geophysics and materials #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.2103.00960
5 pages, 3 figures
arxiv created 2021/03/01 · openalex publication_date 2021/03/01 · arxiv updated 2021/03/02 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
We consider a 1D topological superconductor (TSC) constructed by coupling a pair of Kitaev's Majorana chains with opposite spin configurations. Such a 1D lattice model is known to be protected by a T2 = -1 time-reversal symmetry. Furthermore, we consider a modeled Rashba spin-orbit coupling on such a system of T2=-1 time-reversal symmetric TSC. The Rashba spin-orbit coupling together with the chemical potential engineered the phase transitions of the edge states in the system and consequently the number of Majorona's zero-energy edge modes (MZM's) emerging at the edge of the coupled chains. Correspondingly, the topological nature of the system is described by a phase diagram consisting of three different phases. The three phases are characterized by a topological winding number, W=1, 2 (with one and two MZM's: topological phases) and W=0 (devoid of any MZM: trivial insulating phase).