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A semiconducting nanowire with strong Rashba spin-orbit coupling and coupled to a superconductor can be tuned by an external Zeeman field into a topological phase with Majorana zero modes. Here we theoretically investigate how this exotic…

介观与纳米尺度物理 · 物理学 2017-11-23 Jorge Cayao , Pablo San-Jose , Annica Black-Schaffer , Ramón Aguado , Elsa Prada

We show that a two-dimensional semiconductor with Rashba spin-orbit coupling could be driven into the second-order topological superconducting phase when a mixed-pairing state is introduced. The superconducting order we consider involves…

介观与纳米尺度物理 · 物理学 2019-06-18 Xiaoyu Zhu

We develop a theory for the three-terminal nonlocal conductance in Majorana nanowires as existing in the superconductor-semiconductor hybrid structures in the presence of superconducting proximity, spin-orbit coupling, and Zeeman splitting.…

介观与纳米尺度物理 · 物理学 2021-01-27 Haining Pan , Jay D. Sau , S. Das Sarma

How to distinguish the zero-bias peak (ZBP) caused by the Majorana fermions from that by the other effects remains a challenge in detecting the topological order of a quantum wire. In this paper we propose to distinguish the topological…

介观与纳米尺度物理 · 物理学 2015-07-08 Pei Wang , Jie Liu , Qing-feng Sun , X. C. Xie

We consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana zero-modes at the…

We show that a topologically trivial zero bias conductance peak (of height 4e^2/h) is produced in semiconductor-superconductor hybrid nanowires due to a suppressed pair potential and/or an excess Zeeman field at the ends of the…

超导电性 · 物理学 2015-06-15 Dibyendu Roy , Nilanjan Bondyopadhaya , Sumanta Tewari

We theoretically study the differential conductance of a one-dimensional normal-superconductor-normal-superconductor (N-SNS) junction with a phase bias applied between the two superconductors. We consider specifically a junction formed by a…

介观与纳米尺度物理 · 物理学 2016-08-31 Esben Bork Hansen , Jeroen Danon , Karsten Flensberg

We consider the superconductor-semiconductor nanowire hybrid Majorana platform ("Majorana nanowire") in the presence of a deterministic spatially slowly varying inhomogeneous chemical potential and a random spatial quenched potential…

介观与纳米尺度物理 · 物理学 2021-08-18 Haining Pan , Sankar Das Sarma

Theoretical research suggests a emergence of the Majorana bound states at the ends of the nanowires. Experimental verifications of said concept has already been executed, e.g., in superconductor/semiconductor nanowire devices where…

介观与纳米尺度物理 · 物理学 2020-12-01 Aksel Kobiałka , Andrzej Ptok

One of the most promising platforms for one-dimensional topological superconductivity is based on semiconducting nanowires with strong spin-orbit coupling (SOC), where s-wave superconductivity is induced by proximity effect and an external…

介观与纳米尺度物理 · 物理学 2017-03-23 Jorge Cayao

We consider a new model system supporting Majorana zero modes based on semiconductor nanowires with a full superconducting shell. We demonstrate that, in the presence of spin-orbit coupling in the semiconductor induced by a radial electric…

We investigate transport though normal-superconductor nanowire junctions in the presence of spin-orbit coupling and magnetic field. As the Zeeman field crosses the critical bulk value B_c of the topological transition, a Majorana bound…

介观与纳米尺度物理 · 物理学 2012-11-14 Elsa Prada , Pablo San-Jose , Ramon Aguado

We theoretically discuss electronic transport via Majorana states in magnetic topological insulator-superconductor junctions with an asymmetric split of the applied bias voltage. We study normal-superconductor-normal (NSN) junctions made of…

介观与纳米尺度物理 · 物理学 2023-08-02 Daniele Di Miceli , Eduárd Zsurka , Julian Legendre , Kristof Moors , Thomas Schmidt , Llorenç Serra

Majorana modes are zero-energy excitations of a topological superconductor that exhibit non-Abelian statistics. Following proposals for their detection in a semiconductor nanowire coupled to an s-wave superconductor, several tunneling…

We perform tunneling measurements on indium antimonide nanowire/superconductor hybrid devices fabricated for the studies of Majorana bound states. At finite magnetic field, resonances that strongly resemble Majorana bound states, including…

介观与纳米尺度物理 · 物理学 2024-01-25 Jun Chen , Benjamin Woods , Peng Yu , Moira Hocevar , Diana Car , Sebastien Plissard , Erik Bakkers , Tudor Stanescu , Sergey Frolov

Two-dimensional second-order topological superconductors (SOTSCs) have gapped bulk and edge states, with zero-energy Majorana bound states localized at corners. Motivated by recent advances in Majorana nanowire experiments, we propose to…

介观与纳米尺度物理 · 物理学 2019-09-25 S. Franca , D. V. Efremov , I. C. Fulga

Tunneling experiment is a key technique for detecting Majorana fermion in solid state systems. We use Keldysh non-equilibrium Green function method to study multi-lead tunneling in superconducting nanowire with Rashba and Dresselhaus…

介观与纳米尺度物理 · 物理学 2015-06-11 Jia-Bin You , Xiao-Qiang Shao , Qing-Jun Tong , A. H. Chan , C. H. Oh , Vlatko Vedral

There has been recent interest in superconductor-magnetic insulator hybrid Rashba nanowire setups for potentially hosting Majorana zero modes at smaller external Zeeman fields. Using the non-equilibrium Green's function technique, we…

介观与纳米尺度物理 · 物理学 2023-01-27 Roshni Singh , Bhaskaran Muralidharan

In the presence of Rashba spin-orbit coupling, magnetic field can drive a proximitized nanowire into a topological superconducting phase. We study transport properties of such nanowires in the Coulomb blockade regime. The associated with…

超导电性 · 物理学 2017-08-09 Roman M. Lutchyn , Leonid I. Glazman

An array of quantum wires is a natural starting point in realizing two-dimensional topological phases. We study a system of weakly coupled quantum wires with Rashba spin-orbit coupling, proximity coupled to a conventional s-wave…

超导电性 · 物理学 2015-06-18 Inbar Seroussi , Erez Berg , Yuval Oreg