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Majorana bound state in a coupled quantum-dot hybrid-nanowire system

Deng, M. T. (author)
National University of Defense Technology,University of Copenhagen
Vaitiekenas, S. (author)
University of Copenhagen,Free University of Berlin
Hansen, E. B. (author)
University of Copenhagen
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Danon, J. (author)
University of Copenhagen
Leijnse, M. (author)
Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,University of Copenhagen
Flensberg, K. (author)
University of Copenhagen
Nygård, J. (author)
University of Copenhagen
Krogstrup, P. (author)
University of Copenhagen
Marcus, C. M. (author)
University of Copenhagen
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 (creator_code:org_t)
American Association for the Advancement of Science (AAAS), 2016
2016
English 6 s.
In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 354:6319, s. 1557-1562
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Hybrid nanowires combining semiconductor and superconductor materials appear well suited for the creation, detection, and control of Majorana bound states (MBSs). We demonstrate the emergence of MBSs from coalescing Andreev bound states (ABSs) in a hybrid InAs nanowire with epitaxial Al, using a quantum dot at the end of the nanowire as a spectrometer. Electrostatic gating tuned the nanowire density to a regime of one or a few ABSs. In an applied axial magnetic field, a topological phase emerges in which ABSs move to zero energy and remain there, forming MBSs. We observed hybridization of the MBS with the end-dot bound state, which is in agreement with a numerical model. The ABS/MBS spectra provide parameters that are useful for understanding topological superconductivity in this system.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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