Second-Order Topological Superconductivity in π-Junction Rashba Layers.

08:00 EDT 29th March 2019 | BioPortfolio

Summary of "Second-Order Topological Superconductivity in π-Junction Rashba Layers."

We consider a Josephson junction bilayer consisting of two tunnel-coupled two-dimensional electron gas layers with Rashba spin-orbit interaction, proximitized by a top and bottom s-wave superconductor with phase difference ϕ close to π. We show that, in the presence of a finite weak in-plane Zeeman field, the bilayer can be driven into a second order topological superconducting phase, hosting two Majorana corner states (MCSs). If ϕ=π, in a rectangular geometry, these zero-energy bound states are located at two opposite corners determined by the direction of the Zeeman field. If the phase difference ϕ deviates from π by a critical value, one of the two MCSs gets relocated to an adjacent corner. As the phase difference ϕ increases further, the system becomes trivially gapped. The obtained MCSs are robust against static and magnetic disorder. We propose two setups that could realize such a model: one is based on controlling ϕ by magnetic flux, the other involves an additional layer of randomly oriented magnetic impurities responsible for the phase shift of π in the proximity-induced superconducting pairing.


Journal Details

This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 126402


DeepDyve research library

PubMed Articles [6932 Associated PubMed Articles listed on BioPortfolio]

Soliton defects and topological 4π - periodic superconductivity from an orbital magnetic field effect in edge Josephson junctions.

Recently, much research has been dedicated to understanding topological superconductivity and Majorana zero modes induced by a magnetic field in hybrid proximity structures. This paper prop...

Topological electronic structure and Rashba effect in Bi thin layers: theoretical predictions and experiments.

The goal of the present review is to cross-compare theoretical predictions with selected experimental results on bismuth thin films exhibiting topological properties and a strong Rashba effect. The th...

Emergence of intrinsic superconductivity below 1.178 K in the topologically non-trivial semimetal state of CaSn3.

Topological materials which are also superconducting are of great current interest, since they may exhibit a non-trivial topologically-mediated superconducting phase. Although there have been many rep...

Majorana Kramers Pairs in Higher-Order Topological Insulators.

We propose a tune-free scheme to realize Kramers pairs of Majorana bound states in recently discovered higher-order topological insulators (HOTIs). We show that, by bringing two hinges of a HOTI into ...

Topological Transitions Induced by Antiferromagnetism in a Thin-Film Topological Insulator.

Magnetism in topological insulators (TIs) opens a topologically nontrivial exchange band gap, providing an exciting platform for manipulating the topological order through an external magnetic field. ...

Clinical Trials [1940 Associated Clinical Trials listed on BioPortfolio]

Matching Glaucoma With Impaired Cognition

Glaucoma is the leading cause of irreversible blindness in the world. The current study is designed to find the underlying relationship between impairment of topological perception and inc...

Ureteropelvic Junction Obstruction in Early Childhood: Comparison of Surgical Therapy and Surveillance. A Prospective, Randomized, Controlled Multi-Center Study

In this randomized trial surgical therapy and surveillance of ureteropelvic junction obstruction will be compared, regarding partial renal function.

Evaluation of the Signal to Noise Ratio at Various Retinal Layers

Compare the signal to noise ratio of each device at various retinal layers.

Perioperative mFOLFOX Plus Pembrolizumab in Gastroesophageal Junction (GEJ) and Stomach Adenocarcinoma

To evaluate the antitumor activity and safety/tolerability of the combination (mFOLFOX + Pembrolizumab) in patients with potentially resectable adenocarcinoma of the Gastroesophageal Junct...

Diffuse Gastric and Esophagogastric Junction Cancer S-1 Trial

The purpose of this study is to evaluate the safety and efficacy of S-1 and Cisplatin compared to 5-FU and Cisplatin in treatment of patients with metastatic diffuse gastric and esophagoga...

Medical and Biotech [MESH] Definitions

The region of the STOMACH at the junction with the DUODENUM. It is marked by the thickening of circular muscle layers forming the pyloric sphincter to control the opening and closure of the lumen.

The three primary germinal layers (ECTODERM; ENDODERM; and MESODERM) developed during GASTRULATION that provide tissues and body plan of a mature organism. They derive from two early layers, hypoblast and epiblast.

The only genus in the family Oryziinae, order BELONIFORMES. Oryzias are egg-layers; other fish of the same order are livebearers. Oryzias are used extensively in testing carcinogens.

The ability of an element or metallic alloy to allow the passage of ELECTRONS without ELECTRICAL RESISTANCE and expel MAGNETIC FIELDS below a certain threshold temperature called superconducting transition temperature.

A form-genus of unicellular CYANOBACTERIA in the order Chroococcales. None of the strains fix NITROGEN, there are no gas vacuoles, and sheath layers are never produced.

Quick Search


DeepDyve research library

Searches Linking to this Article