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Two classes of topological superconductors and Majorana modes in condensed matter systems are known to date: one, in which impurity disorder strongly suppresses topological superconducting gap and is detrimental to Majorana modes, and the…

介观与纳米尺度物理 · 物理学 2018-06-13 G. E. Simion , A. Kazakov , L. P. Rokhinson , T. Wojtowicz , Y. B. Lyanda-Geller

For the past decade, Majorana quasiparticles have become one of the hot topics in condensed matter research. Besides the fundamental interest in the realization of particles being their own antiparticles, going back to basic concepts of…

介观与纳米尺度物理 · 物理学 2025-02-12 Stephan Rachel , Roland Wiesendanger

Majorana zero mode is an exotic quasi-particle excitation with non-Abelian statistics in topological superconductor systems, and can serve as the cornerstone for topological quantum computation, a new type of fault-tolerant quantum…

超导电性 · 物理学 2022-04-27 Xianxin Wu , Rui-Xing Zhang , Gang Xu , Jiangping Hu , Chao-Xing Liu

Nonlocal entanglement between two quantum dots can be generated through Majorana fermions. The two Majorana fermions at the ends of an one-dimensional topological superconductor form a nonlocal fermion level, coupling to the occupation…

介观与纳米尺度物理 · 物理学 2015-06-03 Zhi Wang , Xiao Hu

We study the localization and oscillation properties of the Majorana fermions that arise in a two-dimensional electron gas (2DEG) with spin-orbit coupling (SOC) and a Zeeman field coupled with a d-wave superconductor. Despite the angular…

超导电性 · 物理学 2018-02-21 Laura Ortiz , Santiago Varona , Oscar Viyuela , Miguel Angel Martin-Delgado

We prove an index theorem for the existence of Majorana zero modes in a semiconducting thin film with a sizable spin-orbit coupling when it is adjacent to an s-wave superconductor. The theorem, which is analogous to the Jackiw-Rebbi index…

强关联电子 · 物理学 2010-01-21 Sumanta Tewari , Jay D. Sau , S. Das Sarma

We study a one-dimensional (1D) interacting electronic liquid coupled to a 1D array of classical magnetic moments and to a superconductor. We show that at low energy and temperature the magnetic moments and the electrons become strongly…

介观与纳米尺度物理 · 物理学 2013-10-08 Bernd Braunecker , Pascal Simon

A time-reversal invariant topological superconductivity is suggested to be realized in a quasi-one dimensional structure on a plane, which is fabricated by filling the superconducting materials into the periodic channel of dielectric…

介观与纳米尺度物理 · 物理学 2016-05-04 E. Nakhmedov , S. Mammadova , O. Alekperov

Among the different platforms to engineer Majorana fermions in one-dimensional topological superconductors, topological insulator nanowires remain a promising option. Threading an odd number of flux quanta through these wires induces an odd…

介观与纳米尺度物理 · 物理学 2019-05-22 Fernando de Juan , Jens H. Bardarson , Roni Ilan

We study the superconducting instabilities of a single species of two-dimensional Rashba-Dirac fermions, as it pertains to the surface of a three-dimensional time-reversal symmetric topological band insulators. We also discuss the…

超导电性 · 物理学 2013-05-29 Luiz Santos , Titus Neupert , Claudio Chamon , Christopher Mudry

We introduce a model of interacting Majorana fermions that describes a superconducting phase with a topological order characterized by the Fibonacci topological field theory. Our theory, which is based on a $SO(7)_1/(G_2)_1$ coset…

介观与纳米尺度物理 · 物理学 2018-02-08 Yichen Hu , C. L. Kane

We show that lattice dislocations of topological iron-based superconductors such as FeTe$_{1-x}$Se$_x$ will intrinsically trap non-Abelian Majorana quasiparticles, in the absence of any external magnetic field. Our theory is motivated by…

超导电性 · 物理学 2022-09-20 Lun-Hui Hu , Rui-Xing Zhang

We propose using a mobile magnetic domain wall as a host of zero-energy Majorana fermions in a spin-orbit coupled nanowire sandwiched by two ferromagnetic strips and deposited on an $s$-wave superconductor. The ability to control domain…

介观与纳米尺度物理 · 物理学 2015-10-30 Se Kwon Kim , Sumanta Tewari , Yaroslav Tserkovnyak

Exploiting the peculiar properties of proximity-induced superconductivity on the surface of a topological insulator, we propose a device which allows the creation of a Majorana fermion inside the core of a pinned Abrikosov vortex. The…

介观与纳米尺度物理 · 物理学 2011-08-19 A. L. Rakhmanov , A. V. Rozhkov , Franco Nori

A highlighting feature of Majorana bound states in two-dimensional topological superconductors is that they gain a phase factor of $\pi$ upon being orbited by a vortex. This work focuses on the vortex degree of freedom itself and…

强关联电子 · 物理学 2016-06-29 Jeffrey C. Y. Teo , Mayukh Nilay Khan , Smitha Vishveshwara

A two-dimensional second-order topological superconductor exhibits a finite gap in both bulk and edges, with the nontrivial topology manifesting itself through Majorana zero modes localized at the corners, i.e., Majorana corner states. We…

介观与纳米尺度物理 · 物理学 2018-05-29 Xiaoyu Zhu

Developing a gate-tunable, scalable, and topologically-protectable supercurrent qubit and integrating it into a quantum circuit are crucial for applications in the fields of quantum information technology and topological phenomena. Here we…

介观与纳米尺度物理 · 物理学 2019-05-06 Hong-Seok Kim , Yong-Joo Doh

Non-abelian anyons are highly desired for topological quantum computation purposes, with Majorana fermions providing a promising route, particularly zero modes with non-trivial mutual statistics. Yet realizing Majorana zero modes in matter…

强关联电子 · 物理学 2021-04-23 Milan Kornjača , Victor L. Quito , Rebecca Flint

The hope to realize Majorana fermions at the vortex core of a two dimensional topological superconductor has led to a variety of proposals for devices which exhibit topological superconductivity. Many of these include superconductivity…

强关联电子 · 物理学 2014-11-05 Aaron Farrell , T. Pereg-Barnea

Superconductivity and the quantum Hall effect are considered to be two cornerstones of condensed matter physics. The realization of hybrid structures where these two effects coexist has recently become an active field of research. In this…

介观与纳米尺度物理 · 物理学 2020-08-11 Lucila Peralta Gavensky , Gonzalo Usaj , C. A. Balseiro