Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors

• Tudor D. Stanescu,
• Anna Sitek and
• Andrei Manolescu

Beilstein J. Nanotechnol. 2018, 9, 1512–1526, doi:10.3762/bjnano.9.142

• the value of the critical field associated with the topological quantum phase transition. Keywords: core–shell nanowires; Majorana states; multiple 1D chains; prismatic geometry; topological superconducting phase; Introduction The intense ongoing search for Majorana zero modes (MZMs) in solid states

• the other hand, this richness is associated with rather fragile topological phases [29]. In practice, it would be extremely useful to have a knob enabling one to control the robustness of topological superconducting phase. In this work we show that coupling a core–shell nanowire to two or more parent

• additional magnetic field, i.e., other than the longitudinal field needed for the Zeeman energy, or by driving a supercurrent through the superconductors. Hence, by controlling the relative phases of the parent superconductors coupled to the wire one can stabilize the topological superconducting phase that

Interplay between pairing and correlations in spin-polarized bound states

• Szczepan Głodzik,
• Aksel Kobiałka,
• Anna Gorczyca-Goraj,
• Andrzej Ptok,
• Grzegorz Górski,
• Maciej M. Maśka and
• Tadeusz Domański

Beilstein J. Nanotechnol. 2018, 9, 1370–1380, doi:10.3762/bjnano.9.129

• attempting to braid the Majorana end modes, e.g., in T-shape nanowires upon turning on and off the topological superconducting phase in its segments. We briefly analyse here the polarized zero-energy Majorana modes leaking into the multi-site quantum dot (comprising ten lattice sites) side-attached to the

• ) deposited on the superconducting substrate (such as Pb or Al) probed with a conducting STM tip [42]. The topological superconducting phase, hosting the Majorana modes, can be driven in semiconducting wires [58][59] or in nanochains of magnetic atoms [39][40][41][42] through nearest-neighbor equal-spin

• ). The magnetic field B is expressed in units of t/(gμB/2). Magnetically polarized spectrum ρi,↑(ω) − ρi,↓(ω) obtained at ω = 0 for peripheral sites of the Rashba chain. Leakage of the spin-polarized Majorana quasiparticles from the topological superconducting phase of the Rashba chain (i ≥ 10) onto the

Disorder-induced suppression of the zero-bias conductance peak splitting in topological superconducting nanowires

• Jun-Tong Ren,
• Hai-Feng Lü,
• Sha-Sha Ke,
• Yong Guo and
• Huai-Wu Zhang

Beilstein J. Nanotechnol. 2018, 9, 1358–1369, doi:10.3762/bjnano.9.128

• , when VZ is relatively small, the system stays in the topologically trivial phase, and the lowest energy is linearly suppressed as the magnetic field strength increases. Without disorder in the system, the nanowire is driven into a topological superconducting phase when we tune VZ to exceed the phase