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Final published version
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Room-temperature quantum interference in single perovskite quantum dot junctions
AU - Zheng, Haining
AU - Hou, Songjun
AU - Xin, Chenguang
AU - Wu, Qingqing
AU - Jiang, Feng
AU - Tan, Zhibing
AU - Zhou, Xin
AU - Lin, Luchun
AU - He, Wenxiang
AU - Li, Qingmin
AU - Zheng, Jueting
AU - Zhang, Longyi
AU - Liu, Junyang
AU - Yang, Yang
AU - Shi, Jia
AU - Zhang, Xiaodan
AU - Zhao, Ying
AU - Li, Yuelong
AU - Lambert, Colin
AU - Hong, Wenjing
PY - 2019/11/29
Y1 - 2019/11/29
N2 - The studies of quantum interference effects through bulk perovskite materials at the Ångstrom scale still remain as a major challenge. Herein, we provide the observation of room-temperature quantum interference effects in metal halide perovskite quantum dots (QDs) using the mechanically controllable break junction technique. Single-QD conductance measurements reveal that there are multiple conductance peaks for the CH3NH3PbBr3 and CH3NH3PbBr2.15Cl0.85 QDs, whose displacement distributions match the lattice constant of QDs, suggesting that the gold electrodes slide through different lattice sites of the QD via Au-halogen coupling. We also observe a distinct conductance ‘jump’ at the end of the sliding process, which is further evidence that quantum interference effects dominate charge transport in these single-QD junctions. This conductance ‘jump’ is also confirmed by our theoretical calculations utilizing density functional theory combined with quantum transport theory. Our measurements and theory create a pathway to exploit quantum interference effects in quantum-controlled perovskite materials.
AB - The studies of quantum interference effects through bulk perovskite materials at the Ångstrom scale still remain as a major challenge. Herein, we provide the observation of room-temperature quantum interference effects in metal halide perovskite quantum dots (QDs) using the mechanically controllable break junction technique. Single-QD conductance measurements reveal that there are multiple conductance peaks for the CH3NH3PbBr3 and CH3NH3PbBr2.15Cl0.85 QDs, whose displacement distributions match the lattice constant of QDs, suggesting that the gold electrodes slide through different lattice sites of the QD via Au-halogen coupling. We also observe a distinct conductance ‘jump’ at the end of the sliding process, which is further evidence that quantum interference effects dominate charge transport in these single-QD junctions. This conductance ‘jump’ is also confirmed by our theoretical calculations utilizing density functional theory combined with quantum transport theory. Our measurements and theory create a pathway to exploit quantum interference effects in quantum-controlled perovskite materials.
U2 - 10.1038/s41467-019-13389-7
DO - 10.1038/s41467-019-13389-7
M3 - Journal article
VL - 10
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 5458
ER -