Field-Effect Chiral Anomaly Devices with Dirac Semimetal

Chen Jiewei; Zhang Ting; Wang JingliZhang NingJi WeiZhou ShuyunChai Yang

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Field-Effect Chiral Anomaly Devices with Dirac Semimetal

机译：Field-Effect Chiral Anomaly Devices with Dirac Semimetal

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Charge-based field-effect transistors (FETs) greatly suffer from unavoidable carrier scattering and heat dissipation. Analogous to valley degree of freedom in semiconductors, chiral anomaly current in Weyl/Dirac semimetals is theoretically predicted to be nearly nondissipative over long distances, but still lacks experimental ways to efficiently control its transport. Here, field-effect chirality devices are demonstrated with Dirac semimetal PtSe2, in which its Fermi level is close to the Dirac point in the conduction band owing to intrinsic defects. The chiral anomaly is further corroborated by the planar Hall effect and nonlocal valley transport measurement, which can also be effectively modulated by external fields, showing robust nonlocal valley transport with micrometer diffusion length. Similar to charge-based FETs, the chiral conductivity in PtSe2 devices can be modulated by electrostatic gating with an ON/OFF ratio of more than 10(3). Basic logic functions in the devices are also demonstrated with electric and magnetic fields as input signals.

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来源
《Advanced functional materials》 |2021年第40期|2104192.1-2104192.8|共8页
作者
Chen Jiewei; Zhang Ting; Wang JingliZhang NingJi WeiZhou ShuyunChai Yang;
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作者单位

Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Kowloon, Hong Kong, Peoples R China;

Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Peoples R China|Hong Kong Univ Sci & Technol, Inst Adv Study, Hong Kong, Peoples R China;

Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Kowloon, Hong Kong, Peoples R China|Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R ChinaRenmin Univ China, Dept Phys, Beijing 100872, Peoples R ChinaTsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China;

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正文语种英语
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关键词
dissipationless transport; field-effect chirality devices; logic functions;

Field-Effect Chiral Anomaly Devices with Dirac Semimetal

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