Majorana bound states and phase transitions in first- and second-order topological superconductors Xiang-Nan Yuan, Yue Xie and Guo-Qiao Zha Eur. Phys. J. B, 97 10 (2024) 155 Published online: 14 October 2024 DOI: 10.1140/epjb/s10051-024-00800-6