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Topological superconductivity is a state of matter that can host Majorana modes, the building blocks of a topological quantum computer. Many experimental platforms predicted to show such a topological state rely on proximity-induced…

We consider a model of ballistic quasi-one dimensional semiconducting wire with intrinsic spin-orbit interaction placed on the surface of a bulk s-wave superconductor (SC), in the presence of an external magnetic field. This setup has been…

Mesoscale and Nanoscale Physics · Physics 2013-08-06 A. A. Zyuzin , Diego Rainis , Jelena Klinovaja , Daniel Loss

We study analytically the evolution of superconductivity in clean quasi-two-dimensional multiband supercon- ductors as the film thickness enters the nanoscale region by mean-field and semiclassical techniques. Tunneling into the substrate…

Mesoscale and Nanoscale Physics · Physics 2016-01-15 Aurelio Romero-Bermúdez , Antonio M. García-García

Many present and future applications of superconductivity would benefit from electrostatic control of carrier density and tunneling rates, the hallmark of semiconductor devices. One particularly exciting application is the realization of…

Mesoscale and Nanoscale Physics · Physics 2015-05-12 W. Chang , S. M. Albrecht , T. S. Jespersen , F. Kuemmeth , P. Krogstrup , J. Nygård , C. M. Marcus

Heterostructures allow the realization of electronic states that are difficult to obtain in isolated systems. Exemplary is the case of quasi-one-dimensional heterostructures formed by a superconductor and a semiconductor with spin-orbit…

Mesoscale and Nanoscale Physics · Physics 2018-05-02 Dong E. Liu , Enrico Rossi , Roman M. Lutchyn

Motivated by recent experiments searching for Majorana zero modes in tripartite semiconductor nanowires with epitaxial superconductor and ferromagnetic-insulator layers, we explore the emergence of topological superconductivity in such…

Mesoscale and Nanoscale Physics · Physics 2021-04-14 Josias Langbehn , Sergio Acero Gonzalez , Piet W. Brouwer , Felix von Oppen

We theoretically discuss the emergence of fractional Shapiro steps in a Josephson junction created by confining a two-dimensional electron gas at an oxide interface. This phenomenon is induced by an alternating current of proper amplitude…

The interplay of superconductivity with a non-trivial spin texture holds promises for the engineering of non-abelian Majorana quasi-particles. A wide class of systems expected to exhibit exotic correlations are based on nanoscale conductors…

We study the proximity effect between an s-wave superconductor and the surface states of a strong topological insulator. The resulting two dimensional state resembles a spinless p_x+ip_y superconductor, but does not break time reversal…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Liang Fu , C. L. Kane

Superconductor$-$ferromagnetic-insulator heterostructures are paradigmatic systems for studying the mutual influence of superconductivity and magnetism via proximity effects. In particular, spin-split superconductivity is realized in such…

Superconductivity · Physics 2023-12-12 A. S. Ianovskaia , A. M. Bobkov , I. V. Bobkova

The ongoing quest for unambiguous signatures of topological superconductivity and Majorana modes in magnet-superconductor hybrid systems creates a high demand for suitable superconducting substrates. Materials that incorporate $s$-wave…

Superconductivity · Physics 2021-12-23 Philip Beck , Lucas Schneider , Lydia Bachmann , Jens Wiebe , Roland Wiesendanger

We propose a method to create two-dimensional topological superconductors with a heterostructure of ferromagnet (FM), topological insulator (TI) thin film and superconductor, in which the two surfaces of the TI thin film are treated as a…

Superconductivity · Physics 2021-10-01 James Jun He , Tian Liang , Yukio Tanaka , Naoto Nagaosa

Spin chains proximitized with superconducting condensates have emerged as one of the most promising platforms for the realization of Majorana modes. Here, we craft diluted spin chains atom-by-atom following seminal theoretical proposal…

Interfacing a topological insulator (TI) with an $s$-wave superconductor (SC) is a promising material platform that offers the possibility to realize a topological superconductor through which Majorana-based topologically protected qubits…

Mesoscale and Nanoscale Physics · Physics 2022-08-31 Philipp Rüßmann , Stefan Blügel

Topological superconductors are associated with the appearance of Majorana bound states, with promising applications in topologically protected quantum computing. In this Letter, we study a system where a skyrmion crystal is interfaced with…

Superconductivity · Physics 2023-04-14 Kristian Mæland , Asle Sudbø

We observe proximity-induced superconductivity in the \textit{in situ} prepared heterostructures constructed by topological insulator Bi$_{2}$Te$_{3}$ thin films and high-temperature cuprate superconductors…

Superconductivity · Physics 2020-07-01 Siyuan Wan , Qiangqiang Gu , Huazhou Li , Huan Yang , J. Schneeloch , R. D. Zhong , G. D. Gu , Hai-Hu Wen

Bi$_{2}$Te$_{3}$ and Bi$_{2}$Se$_{3}$ are well known 3D-topological insulators. Films made of these materials exhibit metal-like surface states with a Dirac dispersion and possess high mobility. The high mobility metal-like surface states…

Mesoscale and Nanoscale Physics · Physics 2015-06-22 Parijat Sengupta , Tillmann Kubis , Yaohua Tan , Gerhard Klimeck

The superconducting proximity effect has been the focus of significant research efforts over many years and has recently attracted renewed interest as the basis of topologically non-trivial states in materials with a large spin orbit…

Mesoscale and Nanoscale Physics · Physics 2019-07-10 C. Jünger , A. Baumgartner , R. Delagrange , D. Chevallier , S. Lehmann , M. Nilsson , K. A. Dick , C. Thelander , C. Schönenberger

Proximity-induced superconductivity at topological insulator-superconductor (TI-SC) interfaces offers a promising route to topological superconductivity with Majorana boundary modes. However, probing the interfacial superconductivity at…

Mesoscale and Nanoscale Physics · Physics 2026-01-09 Myungjun Kang , Yogeshwar Prasad , Nikhil Danny Babu , Rasoul Ghadimi , Jae Hoon Kim , Sangmo Cheon

Superconductor films on semiconductor substrates draw much attention recently since the derived superconductor-based electronics have been shown promising for future data process and storage technologies. By growing atomically uniform…

Mesoscale and Nanoscale Physics · Physics 2012-01-31 Jian Wang , Xu-Cun Ma , Yun Qi , Ying-Shuang Fu , Shuai-hua Ji , Li Lu , X. C. Xie , Jin-Feng Jia , Xi Chen , Qi-Kun Xue