Gate-tuned Aharonov-Bohm interference of surface states in a quasiballistic Dirac semimetal nanowire
POSTER
Abstract
We report an observation of a topologically protected transport of surface carriers in a quasiballistic Cd3As2
nanowire. The nanowire is thin enough for the spin-textured surface carriers to form 1D subbands, demonstrating
conductance oscillations with gate voltage even without magnetic field. The π-phase shift of Aharonov-Bohm
oscillations can periodically appear/disappear by tuning gate voltage continuously. Such a π-phase shift stems
from the magnetic field induced helical modes in the surface subbands.
nanowire. The nanowire is thin enough for the spin-textured surface carriers to form 1D subbands, demonstrating
conductance oscillations with gate voltage even without magnetic field. The π-phase shift of Aharonov-Bohm
oscillations can periodically appear/disappear by tuning gate voltage continuously. Such a π-phase shift stems
from the magnetic field induced helical modes in the surface subbands.
Presenters
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Benchuan Lin
Peking University
Authors
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Benchuan Lin
Peking University
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Shuo Wang
Peking University
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Zhi-Min Liao
Department of Physics, Peking University, Peking University
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Dapeng Yu
South University of Science and Technology of China