Research output: Contribution to journal › Article › peer-review
Quantum Hall effect and zero-resistance plateau in bulk HgTe. / Savchenko, M. L.; Kozlov, D. A.; Krishtopenko, S. S. et al.
In: Physical Review Research, Vol. 7, No. 4, L042047, 01.12.2025.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Quantum Hall effect and zero-resistance plateau in bulk HgTe
AU - Savchenko, M. L.
AU - Kozlov, D. A.
AU - Krishtopenko, S. S.
AU - Mikhailov, N. N.
AU - Dvoretsky, S. A.
AU - Kvon, Z. D.
AU - Pimenov, A.
AU - Weiss, D.
N1 - The financial support of this work by the Russian Science Foundation (Grant No. 23-72-30003), the European Research Council under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 787515, “ProMotion”), and Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via Project No. 521083032 (Ga501/19) is acknowledged.
PY - 2025/12/1
Y1 - 2025/12/1
N2 - We investigate the quantum Hall effect (QHE) in a gated 1000-nm-thick HgTe film that nominally constitutes a three-dimensional system. Around the charge neutrality point (CNP), we observe a weak zero plateau in the Hall resistance, accompanied by a relatively small value of Rxx on the order of h/e2. We demonstrate that the zero plateau arises from counterpropagating chiral electron-hole edge channels with suppressed interchannel scattering. This behavior resembles that of the quantum spin Hall effect; however, in our case, quasiballistic transport persists over macroscopic distances. We show that the QHE emerges within a two-dimensional (2D) accumulation layer near the gate, while the bulk of the film serves as an electron reservoir. Carrier exchange between the reservoir and the 2D layer gives rise to anomalous scaling of the QHE—not with respect to the CNP, but relative to the first electron plateau.
AB - We investigate the quantum Hall effect (QHE) in a gated 1000-nm-thick HgTe film that nominally constitutes a three-dimensional system. Around the charge neutrality point (CNP), we observe a weak zero plateau in the Hall resistance, accompanied by a relatively small value of Rxx on the order of h/e2. We demonstrate that the zero plateau arises from counterpropagating chiral electron-hole edge channels with suppressed interchannel scattering. This behavior resembles that of the quantum spin Hall effect; however, in our case, quasiballistic transport persists over macroscopic distances. We show that the QHE emerges within a two-dimensional (2D) accumulation layer near the gate, while the bulk of the film serves as an electron reservoir. Carrier exchange between the reservoir and the 2D layer gives rise to anomalous scaling of the QHE—not with respect to the CNP, but relative to the first electron plateau.
UR - https://www.scopus.com/pages/publications/105023586499
UR - https://www.mendeley.com/catalogue/1af892d5-13d6-31fb-91c3-b9f9fe238a15/
U2 - 10.1103/fc7w-cq8f
DO - 10.1103/fc7w-cq8f
M3 - Article
VL - 7
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 4
M1 - L042047
ER -
ID: 72589059