Ballistic superconductivity and tunable π–junctions in InSb quantum wells

Chung Ting Ke, Christian M. Moehle, Folkert K. Vries, Candice Thomas, Sara Metti, Charles R. Guinn, Ray Kallaher, Mario Lodari, Giordano Scappucci, Tiantian Wang, Rosa E. Diaz, Geoffrey C. Gardner, Michael J. Manfra and Srijit Goswami ()
Additional contact information
Chung Ting Ke: Delft University of Technology
Christian M. Moehle: Delft University of Technology
Folkert K. Vries: Delft University of Technology
Candice Thomas: Purdue University
Sara Metti: Purdue University
Charles R. Guinn: Purdue University
Ray Kallaher: Purdue University
Mario Lodari: Delft University of Technology
Giordano Scappucci: Delft University of Technology
Tiantian Wang: Purdue University
Rosa E. Diaz: Purdue University
Geoffrey C. Gardner: Purdue University
Michael J. Manfra: Purdue University
Srijit Goswami: Delft University of Technology

Nature Communications, 2019, vol. 10, issue 1, 1-6

Abstract: Abstract Planar Josephson junctions (JJs) made in semiconductor quantum wells with large spin-orbit coupling are capable of hosting topological superconductivity. Indium antimonide (InSb) two-dimensional electron gases (2DEGs) are particularly suited for this due to their large Landé g-factor and high carrier mobility, however superconducting hybrids in these 2DEGs remain unexplored. Here we create JJs in high quality InSb 2DEGs and provide evidence of ballistic superconductivity over micron-scale lengths. A Zeeman field produces distinct revivals of the supercurrent in the junction, associated with a 0−π transition. We show that these transitions can be controlled by device design, and tuned in-situ using gates. A comparison between experiments and the theory of ballistic π-Josephson junctions gives excellent quantitative agreement. Our results therefore establish InSb quantum wells as a promising new material platform to study the interplay between superconductivity, spin-orbit interaction and magnetism.

Date: 2019
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-019-11742-4 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11742-4

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-019-11742-4

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().