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At an interface between a topological insulator (TI) and a conventional superconductor (SC), superconductivity has been predicted to change dramatically and exhibit novel correlations. In particular, the induced superconductivity by an…

A numerical model based on a lumped circuit element approximation for a bi-superconducting quantum interference device (bi-SQUID) operating in the presence of an external magnetic field is presented in this paper. Included in the model is…

Superconducting Quantum Interference Filters (SQIFs) are arrays of superconducting loops of different sizes including Josephson Junctions (JJ). For a random distribution of sizes, they present a non-periodic response to an applied magnetic…

Understanding of the exotic quantum phenomena in bulk bismuth beyond its ultraquantum limit still remains controversial and gives rise to a renewed interest. The focus of the issues is whether these quantum properties have a conventional…

Mesoscale and Nanoscale Physics · Physics 2014-07-29 Wei Ning , Fengyu Kong , Chuanying Xi , David Graf , Haifeng Du , Yuyan Han , Jiyong Yang , Kun Yang , Mingliang Tian , Yuheng Zhang

Topological insulators are transformative quantum solids with immune-to-disorder metallic surface states having Dirac band structure. Ubiquitous charged bulk defects, however, pull the Fermi energy into the bulk bands, denying access to…

Nontrivial band topology along with magnetism leads to different novel quantum phases. When time-reversal-symmetry is broken in three-dimensional topological insulators (TIs) by applying high enough magnetic field or proximity effect,…

Mesoscale and Nanoscale Physics · Physics 2023-09-11 Nezhat Pournaghavi , Banasree Sadhukhan , Anna Delin

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

Miniaturization of superconducting quantum interference devices (SQUIDs) is of major importance for the development of sensitive scanning nanoscale magnetometry tools. The high sensitivity of nanoSQUIDs is restricted, however, to only…

Superconductivity · Physics 2016-11-28 Alexander Y. Meltzer , Aviram Uri , Eli Zeldov

An rf superconducting quantum interference device (SQUID) array in an alternating magnetic field is investigated with respect to its effective magnetic permeability, within the effective medium approximation. This system acts as an…

Materials Science · Physics 2019-07-19 N. Lazarides , G. P. Tsironis

Topological superconductors (TSCs) are of significant current interest because they offer promising platforms for finding Majorana fermions. Here we report a new superconductor synthesized by intercalating Cu into a naturally-formed…

Superconductivity · Physics 2015-06-19 Satoshi Sasaki , Kouji Segawa , Yoichi Ando

We report the transport measurements on the InAs self-assembled quantum dots (SAQDs) which have a unique structural zero-dimensionality, coupled to a superconducting quantum interference device (SQUID). Owing to the SQUID geometry, we…

Mesoscale and Nanoscale Physics · Physics 2011-02-10 S. Kim , R. Ishiguro , M. Kamio , Y. Doda , E. Watanebe , K. Shibata , K. Hirakawa , H. Takayanagi

The discovery of two-dimensional gapless Dirac fermions in graphene and topological insulators (TI) has sparked extensive ongoing research toward applications of their unique electronic properties. The gapless surface states in…

Mesoscale and Nanoscale Physics · Physics 2019-10-15 Minjin Kim , Jihwan Kim , Yasen Hou , Dong Yu , Yong-Joo Doh , Bongsoo Kim , Kun Woo Kim , Junho Suh

Quantum spin Hall insulators (QSHIs), also known as two-dimensional topological insulators, have emerged as an unconventional class of quantum states with insulating bulk and conducting edges originating from nontrivial inverted band…

Mesoscale and Nanoscale Physics · Physics 2016-11-11 Takafumi Akiho , François Couëdo , Hiroshi Irie , Kyoichi Suzuki , Koji Onomitsu , Koji Muraki

Superconducting-proximity topological insulators (STIs) have garnered significant research attention over the past two decades. In this Letter, we demonstrate that a low-dimensional STI in the topological-nontrivial phase (TP) exhibits an…

Superconductivity · Physics 2024-09-02 Yajiang Chen , Ke-Ji Chen , Jia-Ji Zhu , A. A. Shanenko

The realization of a topological qubit calls for advanced techniques to readily and reproducibly engineer induced superconductivity in semiconductor nanowires. Here, we introduce an on-chip fabrication paradigm based on shadow walls that…

Superconducting quantum interference devices (SQUIDs) are state-of-the-art in ultra-sensitive magnetometry; however, conventional SQUID devices are fundamentally limited by the inherently nonlinear and periodic nature of their transfer…

Superconductivity · Physics 2026-03-02 Angelo Greco , Giorgio De Simoni , Francesco Giazotto

With the development of novel computing schemes working at cryogenic temperatures, superconducting memory elements have become essential. In this context, superconducting quantum interference devices (SQUIDs) are promising candidates, as…

A WSe2 monolayer of 1T' phase is a large band gap quantum spin Hall insulator, supporting dissipationless charge and spin transports through the topologically protected edge states. In this work, we explore the nanoribbon forms of 1T' phase…

Mesoscale and Nanoscale Physics · Physics 2023-02-28 Hong Tang , Jason M. Breslin , Li Yin , Adrienn Ruzsinszky

Quantum spin Hall insulators have one-dimensional (1D) spin-momentum locked topological edge states (ES) inside the bulk band gap, which can serve as dissipationless channels for the practical applications in low consumption electronics and…

Materials Science · Physics 2021-09-01 Jincheng Zhuang , Jin Li , Yundan Liu , Dan Mu , Ming Yang , Yani Liu , Wei Zhou , Weichang Hao , Jianxin Zhong , Yi Du

Topological superconductivity is central to a variety of novel phenomena involving the interplay between topologically ordered phases and broken-symmetry states. The key ingredient is an unconventional order parameter, with an orbital…