@article{WOS:000686911500005,
 abstract = {Electrical conductance measurements have a limited scope in identifying
Andreev edge states (AESs), which form the basis for realizing various
topological excitations in quantum Hall (QH)-superconductor (SC)
junctions. To unambiguously detect AESs, we measure shot noise along
with electrical conductance in a graphene-based QH-SC junction at
integer filling nu = 2. Remarkably, we find that the Fano factor of shot
noise approaches half when the bias energy is less than the
superconducting gap (2 Delta), whereas it is close to zero above 2
Delta. This is striking, given that, at the same time, the electrical
conductance remains quantized at 2e(2)/h within and above 2 Delta. A
quantized conductance is expected to produce zero-shot noise due to its
dissipationless flow. However, at a QH-SC interface, AESs carry the
current in the zero-bias limit and an equal mixing of electron- and
holelike states produces half of the Poissonian shot noise with
quantized conductance. The observed results are in accord with our
detailed theoretical calculations of electrical conductance and shot
noise based on the nonequilibrium Green's function method in the
presence of disorder. Our results pave the way in using shot noise as a
detection tool in the search for exotic topological excitations in QH-SC
hybrids.},
 article-number = {L081404},
 author = {Sahu, Manas Ranjan and Paul, Arup Kumar and Sutradhar, Jagannath and
Watanabe, K. and Taniguchi, T. and Singh, Vibhor and Mukerjee, Subroto
and Banerjee, Sumilan and Das, Anindya},
 doi = {10.1103/PhysRevB.104.L081404},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {AUG 18},
 number = {8},
 orcid-numbers = {Watanabe, Kenji/0000-0003-3701-8119},
 researcherid-numbers = {Watanabe, Kenji/H-2825-2011},
 title = {Quantized conductance with nonzero shot noise as a signature of Andreev
edge state},
 unique-id = {WOS:000686911500005},
 volume = {104},
 year = {2021}
}