TY - JOUR
T1 - Tunneling spectroscopy of quantum hall states in bilayer graphene p-n junctions
AU - Wang, Ke
AU - Harzheim, Achim
AU - Taniguchi, Takashi
AU - Watanabei, Kenji
AU - Lee, Ji Ung
AU - Kim, Philip
N1 - Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/4/10
Y1 - 2019/4/10
N2 - We report tunneling transport in spatially controlled networks of quantum Hall (QH) edge states in bilayer graphene. By manipulating the separation, location, and spatial span of QH edge states via gate-defined electrostatics, we observe resonant tunneling between copropagating QH states across incompressible strips. Employing spectroscopic tunneling measurements and an analytical model, we characterize the energy gap, width, density of states, and compressibility of the QH edge states with high precision and sensitivity within the same device. The capability to engineer the QH edge network also provides an opportunity to build future quantum electronic devices with electrostatic manipulation of QH edge states, supported by rich underlying physics.
AB - We report tunneling transport in spatially controlled networks of quantum Hall (QH) edge states in bilayer graphene. By manipulating the separation, location, and spatial span of QH edge states via gate-defined electrostatics, we observe resonant tunneling between copropagating QH states across incompressible strips. Employing spectroscopic tunneling measurements and an analytical model, we characterize the energy gap, width, density of states, and compressibility of the QH edge states with high precision and sensitivity within the same device. The capability to engineer the QH edge network also provides an opportunity to build future quantum electronic devices with electrostatic manipulation of QH edge states, supported by rich underlying physics.
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U2 - 10.1103/PhysRevLett.122.146801
DO - 10.1103/PhysRevLett.122.146801
M3 - Article
C2 - 31050489
AN - SCOPUS:85064378742
SN - 0031-9007
VL - 122
JO - Physical review letters
JF - Physical review letters
IS - 14
M1 - 146801
ER -