Terahertz Photodetection with Type-II Dirac Fermions in Transition-Metal Ditellurides and Their Heterostructures

Libo Zhang, Cheng Guo, Chia Nung Kuo, Huang Xu, Kaixuan Zhang, Barun Ghosh, Jessica De Santis, Danil W. Boukhvalov, Ivana Vobornik, Valentina Paolucci, Chin Shan Lue, Huaizhong Xing, Amit Agarwal, Lin Wang, Antonio Politano

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2 引文 斯高帕斯(Scopus)

摘要

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.

原文English
文章編號2100212
期刊Physica Status Solidi - Rapid Research Letters
15
發行號8
DOIs
出版狀態Published - 2021 八月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學

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