Topographic signatures and manipulations of Fe atoms, CO molecules and NaCl islands on superconducting Pb(111)

• Carl Drechsel,
• Philipp D’Astolfo,
• Jung-Ching Liu,
• Thilo Glatzel,
• Rémy Pawlak and
• Ernst Meyer

Beilstein J. Nanotechnol. 2022, 13, 1–9, doi:10.3762/bjnano.13.1

• Carl Drechsel Philipp D'Astolfo Jung-Ching Liu Thilo Glatzel Remy Pawlak Ernst Meyer Department of Physics, Universität Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland 10.3762/bjnano.13.1 Abstract Topological superconductivity emerging in one- or two-dimensional hybrid materials is

• of iron atoms on top of the prototypical Pb(111) superconducting surface. Keywords: carbon monoxide (CO); lateral manipulation; NaCl; scanning tunneling microscopy; superconductivity; Introduction The most exciting manifestation of topological superconductivity [1][2][3] is the Majorana zero mode

• (MZM), which has attracted a tremendous interest due to its non-Abelian quantum exchange statistics proposed as a key ingredient for topological quantum computing [4][5][6]. Topological superconductivity can intrinsically arise in the bulk of certain materials [7] or can be engineered at the interface

Interaction-induced zero-energy pinning and quantum dot formation in Majorana nanowires

• Samuel D. Escribano,
• Alfredo Levy Yeyati and
• Elsa Prada

Beilstein J. Nanotechnol. 2018, 9, 2171–2180, doi:10.3762/bjnano.9.203

• , such as InAs or InSb, are becoming ideal systems for the artificial generation of topological superconductivity [1][2][3]. In addition to its fundamental interest, such nanowires that may host Majorana bound states (MBSs) at their ends or interfaces [4][5] constitute promising platforms for Majorana

Josephson effect in junctions of conventional and topological superconductors

• Alex Zazunov,
• Albert Iks,
• Miguel Alvarado,
• Alfredo Levy Yeyati and
• Reinhold Egger

Beilstein J. Nanotechnol. 2018, 9, 1659–1676, doi:10.3762/bjnano.9.158

• -terminal S–TS–S geometry, where the TS wire acts as tunable parity switch on the Andreev bound states in a superconducting atomic contact. Keywords: Andreev bound states; Josephson current–phase relation; Majorana zero modes; topological superconductivity; Introduction The physics of topological

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

• system in the presence of non-vanishing transverse potentials and finite relative phases between the parent superconductors. We show that having finite relative phases strongly enhances the stability of the induced topological superconductivity over a significant range of chemical potentials and reduces

• sign change of the Pfaffian, is accompanied by the closing of the quasiparticle gap at k = 0. Results and Discussion Nanowire coupled to superconductors with no relative phase difference The emergence of topological superconductivity and zero-energy Majorana bound states in core–shell nanowires coupled

• topological phase diagram for a square wire with Veff() ≠ 0 and the minimum gap along a representative cut through the phase diagram. The results are shown in Figure 5. Note that all topologically trivial and nontrivial phases are gapped. However, the gaps are rather small indicating the fact that topological

Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer

• Christopher Reeg,
• Daniel Loss and
• Jelena Klinovaja

Beilstein J. Nanotechnol. 2018, 9, 1263–1271, doi:10.3762/bjnano.9.118

• . Keywords: Majorana fermions; mesoscopic physics; proximity effect; quantum computing; topological superconductivity; Introduction Topological superconductors host zero-energy Majorana bound states at their edges that are highly sought for applications in topological quantum computing [1][2][3]. The two

• proposals to realize topological superconductivity that have received the most attention to date involve engineering Majorana bound states in either low-dimensional semiconducting systems [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] or in ferromagnetic atomic chains [24][25][26

• ][27][28][29][30][31][32]. After the first signatures of topological superconductivity were observed [33][34][35][36][37], much of the experimental focus was placed on developing more suitable devices for realizing robust topological superconducting phases. One of the most significant experimental