TY - JOUR
T1 - Terahertz Photodetection with Type-II Dirac Fermions in Transition-Metal Ditellurides and Their Heterostructures
AU - Zhang, Libo
AU - Guo, Cheng
AU - Kuo, Chia Nung
AU - Xu, Huang
AU - Zhang, Kaixuan
AU - Ghosh, Barun
AU - De Santis, Jessica
AU - Boukhvalov, Danil W.
AU - Vobornik, Ivana
AU - Paolucci, Valentina
AU - Lue, Chin Shan
AU - Xing, Huaizhong
AU - Agarwal, Amit
AU - Wang, Lin
AU - Politano, Antonio
N1 - Publisher Copyright:
© 2021 The Authors. physica status solidi (RRL) Rapid Research Letters published by Wiley-VCH GmbH
PY - 2021/8
Y1 - 2021/8
N2 - Transition-metal dichalcogenides PtTe2, PdTe2, and NiTe2 deserve particular attention, due to the presence of type-II Dirac fermions. As a matter of fact, tilted Dirac cones afford a suitable platform for optoelectronics of dissipation-less carrier-transport, favored by their ultrahigh carrier mobility, and large nonsaturating magnetoresistance. Herein, it is shown that PtTe2, PdTe2, and NiTe2 display high-speed terahertz (THz) detection capability at room temperature, which originates from their peculiar band structure with topologically protected electronic states. Furthermore, photodetectors based on their heterostructures are able to suppress dark current with high-performance detection of THz light. Furthermore, these crystals are stable in air and they can be easily exfoliated in nanosheets by liquid-phase exfoliation, due to the weak interlayer van der Waals bonds. The obtained results clearly establish that the type-II Dirac semimetals based on transition-metal ditellurides have immense research potential for addressing application-oriented issues for remote sensing and telecommunications.
AB - Transition-metal dichalcogenides PtTe2, PdTe2, and NiTe2 deserve particular attention, due to the presence of type-II Dirac fermions. As a matter of fact, tilted Dirac cones afford a suitable platform for optoelectronics of dissipation-less carrier-transport, favored by their ultrahigh carrier mobility, and large nonsaturating magnetoresistance. Herein, it is shown that PtTe2, PdTe2, and NiTe2 display high-speed terahertz (THz) detection capability at room temperature, which originates from their peculiar band structure with topologically protected electronic states. Furthermore, photodetectors based on their heterostructures are able to suppress dark current with high-performance detection of THz light. Furthermore, these crystals are stable in air and they can be easily exfoliated in nanosheets by liquid-phase exfoliation, due to the weak interlayer van der Waals bonds. The obtained results clearly establish that the type-II Dirac semimetals based on transition-metal ditellurides have immense research potential for addressing application-oriented issues for remote sensing and telecommunications.
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U2 - 10.1002/pssr.202100212
DO - 10.1002/pssr.202100212
M3 - Article
AN - SCOPUS:85105914864
SN - 1862-6254
VL - 15
JO - Physica Status Solidi - Rapid Research Letters
JF - Physica Status Solidi - Rapid Research Letters
IS - 8
M1 - 2100212
ER -