Plasma modes in capacitively coupled superconducting nanowires

• Alex Latyshev,
• Andrew G. Semenov and
• Andrei D. Zaikin

Beilstein J. Nanotechnol. 2022, 13, 292–297, doi:10.3762/bjnano.13.24

• interaction between quantum phase slips (QPS) [1][2][17][18] causing Berezinskii–Kosterlitz–Thouless-like [17] and Schmid-like [19][20][21] quantum phase transitions in structures involving superconducting nanowires. In this work we are going to investigate propagation of plasma modes in a system of two long

Functional nanostructures for electronics, spintronics and sensors

• Anatolie S. Sidorenko

Beilstein J. Nanotechnol. 2020, 11, 1704–1706, doi:10.3762/bjnano.11.152

• includes several articles devoted to extra-sensitive detectors, their theoretical basis and technological process in terms of fabrication. For example, a novel phenomenon was presented in [15], which predicted the phenomena of superconductor–insulator quantum phase transitions in ultrathin capacitively

Superconductor–insulator transition in capacitively coupled superconducting nanowires

• Alex Latyshev,
• Andrew G. Semenov and
• Andrei D. Zaikin

Beilstein J. Nanotechnol. 2020, 11, 1402–1408, doi:10.3762/bjnano.11.124

• Moscow, Russia Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe, Germany 10.3762/bjnano.11.124 Abstract We investigate superconductor–insulator quantum phase transitions in ultrathin capacitively coupled superconducting nanowires with

• close to each other. Keywords: quantum phase slips; quantum phase transitions; RG equations; Introduction Quantum fluctuations dominate the physics of superconducting nanowires at sufficiently low temperatures making their behavior markedly different from that of bulk superconductors [1][2][3][4

• , representing an effective sine-Gordon model that will be treated below. Quantum phase transitions: renormalization group analysis In order to quantitatively describe QPT in coupled superconducting wires we will employ the renormalization group (RG) analysis. This approach is well developed and was successfully

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

•  14 for U = 0. Our findings cannot be applied to 0–π transitions and to other kinds of quantum phase transitions that may be eventually present in this system, beyond the topological one we discussed. The particle–hole gap and gapless points The particle–hole gap, i.e., the difference between the

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

• studies came from the fact that the QD can be driven into the magnetic regime where it represents a spin-1/2 impurity subject to Kondo screening by the leads. The Kondo effect then competes against the superconducting bulk gap and one encounters local quantum phase transitions. By now, good agreement

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

• wire. One can actually view the wire as a set of n coupled chains, each having a pair of Majorana modes at its ends. On the one hand, this results in a rich phase diagram [29], which means that core–shell nanowires provide an interesting playground for studying topological quantum phase transitions. On

• quantum phase transitions become nearly parallel, Figure 15C. This result can be interpreted as an increased interaction between the corner states in the presence of the phase shift θ of the superconductors. Another consequence of this phase shift is that the absolute gap of the BdG spectrum decreases in