Topological insulator based axial superconducting quantum interferometer structures

JuSER (Forschungszentrum Jülich)

Abstract

Nanoscale superconducting quantum interference devices (SQUIDs) are fabricated in-situ from a single Bi$_{0.26}$Sb$_{1.74}$Te$_{3}$ nanoribbon that is defined using selective-area growth and contacted with superconducting Nb electrodes via a shadow mask technique. We present $h/(2e)$ magnetic flux periodic interference in both, fully and non-fully proximitized nanoribbons. The pronounced oscillations are explained by interference effects of coherent transport through topological surface states surrounding the cross-section of the nanoribbon.

Authors 13

1. Erik Zimmermann Aachen JARA-Fundamentals of Future Information Technology

   Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   JARA-Fundamentals of Future Information Technology , Jülich-Aachen Research Alliance , Forschungszentrum Jülich and RWTH Aachen University , Germany

   Peter Grünberg Institut (PGI-9) , Forschungszentrum Jülich , 52425 Jülich , Germany

2. Abdur Rehman Jalil Aachen JARA-Fundamentals of Future Information Technology

   Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   JARA-Fundamentals of Future Information Technology , Jülich-Aachen Research Alliance , Forschungszentrum Jülich and RWTH Aachen University , Germany

   Peter Grünberg Institut (PGI-9) , Forschungszentrum Jülich , 52425 Jülich , Germany

3. Michael Schleenvoigt Aachen JARA-Fundamentals of Future Information Technology

   Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   JARA-Fundamentals of Future Information Technology , Jülich-Aachen Research Alliance , Forschungszentrum Jülich and RWTH Aachen University , Germany

   Peter Grünberg Institut (PGI-9) , Forschungszentrum Jülich , 52425 Jülich , Germany

4. Jan Karthein Aachen JARA-Fundamentals of Future Information Technology

   Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   JARA-Fundamentals of Future Information Technology , Jülich-Aachen Research Alliance , Forschungszentrum Jülich and RWTH Aachen University , Germany

   Peter Grünberg Institut (PGI-9) , Forschungszentrum Jülich , 52425 Jülich , Germany

5. Benedikt Frohn Aachen JARA-Fundamentals of Future Information Technology

   Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   JARA-Fundamentals of Future Information Technology , Jülich-Aachen Research Alliance , Forschungszentrum Jülich and RWTH Aachen University , Germany

   Peter Grünberg Institut (PGI-9) , Forschungszentrum Jülich , 52425 Jülich , Germany

6. Gerrit Behner Aachen JARA-Fundamentals of Future Information Technology

   Forschungszentrum Jülich · Jülich Aachen Research Alliance · RWTH Aachen University

   Affiliation as printed

   JARA-Fundamentals of Future Information Technology , Jülich-Aachen Research Alliance , Forschungszentrum Jülich and RWTH Aachen University , Germany

   Peter Grünberg Institut (PGI-9) , Forschungszentrum Jülich , 52425 Jülich , Germany

7. Florian Lentz

   Forschungszentrum Jülich

   Affiliation as printed

   Helmholtz Nano Facility (HNF) , Forschungszentrum Jülich , 52425 Jülich , Germany

8. Stefan Trellenkamp

   Forschungszentrum Jülich

   Affiliation as printed

   Helmholtz Nano Facility (HNF) , Forschungszentrum Jülich , 52425 Jülich , Germany

9. Elmar Neumann

   Forschungszentrum Jülich

   Affiliation as printed

   Helmholtz Nano Facility (HNF) , Forschungszentrum Jülich , 52425 Jülich , Germany

10. Peter Schüffelgen
11. Hans Luth
12. Detlev Grützmacher
13. Thomas Schäpers