Proximity-Induced Superconductivity with Subgap Anomaly
in Type II Weyl Semi-Metal WTe2
Version 2 2018-11-16, 20:43
Version 1 2018-11-12, 16:19
Posted on 2018-11-16 - 20:43
Due
to the nontrivial topological band structure in type II Weyl
semi-metal tungsten ditelluride (WTe2), unconventional
properties may emerge in its superconducting phase. While realizing
intrinsic superconductivity has been challenging in the type II Weyl
semi-metal WTe2, the proximity effect may open an avenue
for the realization of superconductivity. Here, we report the observation
of proximity-induced superconductivity with a long coherence length
along the c axis in WTe2 thin flakes based
on a WTe2/NbSe2 van der Waals heterostructure.
Interestingly, we also observe anomalous oscillations of the differential
resistance during the transition from the superconducting to the normal
state. Theoretical calculations show excellent agreement with experimental
results, revealing that such a subgap anomaly is the intrinsic property
of WTe2 in superconducting state induced by the proximity
effect. Our findings enrich the understanding of the superconducting
phase of type II Weyl semi-metals and pave the way for their future
applications in topological quantum computing.
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Li, Qiao; He, Chaocheng; Wang, Yaojia; Liu, Erfu; Wang, Miao; Wang, Yu; et al. (2018). Proximity-Induced Superconductivity with Subgap Anomaly
in Type II Weyl Semi-Metal WTe2. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.8b03924
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AUTHORS (19)
QL
Qiao Li
CH
Chaocheng He
YW
Yaojia Wang
EL
Erfu Liu
MW
Miao Wang
YW
Yu Wang
JZ
Junwen Zeng
ZM
Zecheng Ma
TC
Tianjun Cao
CY
Changjiang Yi
NW
Naizhou Wang
KW
Kenji Watanabe
TT
Takashi Taniguchi
LS
Lubing Shao
YS
Youguo Shi
XC
Xianhui Chen
SL
Shi-Jun Liang
QW
Qiang-Hua Wang
FM
Feng Miao