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

• from the underlying superconductors. With this prospect, we emphasize that, in addition to tip manipulations, the use of alkali halide islands, adsorbed on a superconducting surface and acting as a buffer layer, is another interesting field for research on topological superconductors [41][42][43][44

A zero-dimensional topologically nontrivial state in a superconducting quantum dot

• Pasquale Marra,
• Alessandro Braggio and
• Roberta Citro

Beilstein J. Nanotechnol. 2018, 9, 1705–1714, doi:10.3762/bjnano.9.162

• temperatures. Keywords: Josephson effect; Josephson junctions; quantum dots; superconducting quantum dots; topological states; topological superconductors; Introduction Since the discovery of the quantum Hall effect [1][2] and the theoretical prediction of Majorana bound states in triplet superconductors [3

• ., in a system with discrete energy spectrum. A very important class of topological states of matter are topological superconductors: These materials support Majorana zero-energy modes at the edges of the system [11][12][13], which have been proposed as the building block of topological quantum devices

• ]. Moreover, topological superconductors exhibit very distinct features in their transport properties and in particular in their Josephson current [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. In a recent work [50], we have studied the short-size limit of a

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

• , we naturally extend previous works on Josephson junctions with a magnetic impurity between two conventional superconductors, as well as other works on Josephson junctions between topological and non-topological superconductors but without a magnetic impurity. In the simplest description, Josephson

• numerical results within the mean-field approximation, we predict φ0-junction behavior (anomalous Josephson effect) for the current–phase relation when the TS wire is in the topological phase. As a final example for devices combining conventional and topological superconductors, we have shown that S–TS–S

• -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

Spatial Rabi oscillations between Majorana bound states and quantum dots

• Jun-Hui Zheng,
• Dao-Xin Yao and
• Zhi Wang

Beilstein J. Nanotechnol. 2018, 9, 1527–1535, doi:10.3762/bjnano.9.143

• splitting between two Majorana bound states. Keywords: Andreev bound state; Majorana bound state; nonlocal quantum correlation; quantum dot; spatial Rabi oscillation; Introduction Majorana bound states are exotic non-Abelian quasiparticles in topological superconductors [1][2][3][4][5][6][7][8][9][10][11

• ][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The study of Majorana bound states has attracted tremendous interest recently because they constitute topological parity qubits. These qubits are defined by the degenerate ground states of topological superconductors, and therefore are

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

• systems is motivated, in part, by the perspective of using them as a platform for fault-tolerant topological quantum computation [1][2][3][4]. Several practical realizations of “synthetic” topological superconductors that host zero-energy Majorana modes have been proposed in the past few years, the most

Andreev spectrum and supercurrents in nanowire-based SNS junctions containing Majorana bound states

• Jorge Cayao,
• Annica M. Black-Schaffer,
• Elsa Prada and
• Ramón Aguado

Beilstein J. Nanotechnol. 2018, 9, 1339–1357, doi:10.3762/bjnano.9.127

• states (MBSs) in engineered topological superconductors. We perform a systematic numerical study of the low-energy Andreev spectrum and supercurrents in short and long superconductor–normal–superconductor junctions made of nanowires with strong Rashba spin–orbit coupling, where an external Zeeman field

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

Revealing the interference effect of Majorana fermions in a topological Josephson junction

• Jie Liu,
• Tiantian Yu and
• Juntao Song

Beilstein J. Nanotechnol. 2018, 9, 520–529, doi:10.3762/bjnano.9.50

• topological superconductors as shown in Figure 1a. Unlike previous studies, we focus on the density of states (DOS) for both the electron part and the hole part. The essential property of the MFs is that the wave function of the electron part must be conjugated with the wave function of the hole part, which