Induced superconductivity in fractional quantum Hall edge
ORAL
Abstract
Topological superconductors (TS) represent a phase of matter whose properties are insensitive to local perturbations. This robustness renders TS suitable for application in quantum computing. The past decade has witnessed substantial progress towards a quantum bit using Majorana modes, the well-known non-Abelian modes in TS. However, because Majoranas lack a universal logic gate set, Majorana quantum bits are computationally limited. This important drawback can be overcome by parafermions, a novel set of non-Abelian modes whose array supports universal topological quantum computation. A primary route to synthesize parafermions involves inducing superconductivity in fractional quantum Hall (FQH) edge. Here we use high-quality van der Waals devices coupled to a narrow NbN which remains superconducting in the magnetic fields required for robust FQH. We find crossed Andreev reflection (CAR) across the narrow NbN that separates two counterpropagating FQH edges. Control experiments show that CAR vanishes with increasing temperature, excitation and magnetic field as expected from the theory. These results lay the groundwork for experimental parafermion research in condensed matter.
*Ö.G. acknowledges support by a Rubicon grant of the Netherlands Organization for Scientific Research (NWO).
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Presenters
Onder Gul
Harvard University
Authors
Onder Gul
Harvard University
Yuval Ronen
Harvard University
Si Young Lee
Harvard University
Jonathan Zauberman
Harvard University
Hassan Shapourian
Harvard University
Brennan Dizdar
Harvard University
Young Jae Shin
Brookhaven National Laboratory
Center for Functional Nanomaterials, Brookhaven National Laboratory
Danial Haei Najafabadi
University of Massachusetts Lowell
Kenji Watanabe
National Institute for Materials Science, Japan
National Institute for Material Science
National Institute for Materials Science
National Institute for Materials Science, Tsukuba
Research Center for Functional Materials, NIMS
nims
Advanced Materials Laboratory, National Institute for Materials Science
National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
NIMS
National Institute for Material Science - Japan
NIMS Tsukuba
National Institute for Materials Science, Namiki 1-1, Ibaraki 305-0044, Japan.
National Institute for Materials Science (NIMS)
National Institute for Materials Science,Tsukuba, Ibaraki 305-0047, Japan
Advanced Materials Laboratory, NIMS, Japan
National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
National Institute of Materials Science
National Institute for Materials Science, University of Tsukuba
National Institute for Materials Science, Tsukuba, Japan
National Institute for Material Science, Japan
National Institue for Material Science, Tsukuba
Advanced Materials Laboratory, NIMS
Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba 305-0044, Japan
Advanced Matrials Lab, NIMS
National Institute for Material Science, Tsukuba, Japan
National institute for materials science
NIMS-Tsukuba
NIMS, Japan
National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
NIRM
Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
NIMS Japan
National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
Advanced Materials Laboratory, National Institute of Materials Science
Advanced Materials Laboratory, National Institute for Materials Science 1-1 Namiki, Tsukuba, 305-0044, Japan
National Institute of Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Material Science (Japan)
Physics, NIMS
National Institute of Materials Science, Japan
National Institute of Materials Science (NIMS)
National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
NIMS - Tsukuba
Takashi Taniguchi
National Institute for Materials Science, Japan
National Institute for Material Science
National Institute for Materials Science
National Institute for Materials Science, Tsukuba
Research Center for Functional Materials, NIMS
nims
Advanced Materials Laboratory, National Institute for Materials Science
National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
NIMS
National Institute for Material Science - Japan
NIMS Tsukuba
National Institute for Materials Science, Namiki 1-1, Ibaraki 305-0044, Japan.
National Institute for Materials Science (NIMS)
National Institute for Materials Science,Tsukuba, Ibaraki 305-0047, Japan
Advanced Materials Laboratory, NIMS, Japan
National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
National Institute of Materials Science
National Institute for Materials Science, University of Tsukuba
National Institute for Materials Science, Tsukuba, Japan
National Institue for Material Science, Tsukuba
Advanced Materials Laboratory, NIMS
Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba 305-0044, Japan
Advanced Matrials Lab, NIMS
National Institute for Material Science, Tsukuba, Japan
National institute for materials science
NIMS-Tsukuba
NIMS, Japan
National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
NIMS Japan
National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
Advanced Materials Laboratory, National Institute of Materials Science
Advanced Materials Laboratory, National Institute for Materials Science 1-1 Namiki, Tsukuba, 305-0044, Japan
National Institute of Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Material Science (Japan)
Physics, NIMS
National Institute of Materials Science, Japan
National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
NIMS - Tsukuba
Ashvin Vishwanath
Harvard University
Physics, Harvard University
Department of Physics, Harvard University
Amir Yacoby
Harvard University
Department of Physics, Harvard University
Physics, Harvard University
Department of Physics, Harvard University, Cambridge, MA, 02138, USA
