Collier TP, Portnoi ME. Double-Gated Nanohelix as a Novel Tunable Binary Superlattice.
NANOSCALE RESEARCH LETTERS 2019;
14:257. [PMID:
31448386 PMCID:
PMC6709081 DOI:
10.1186/s11671-019-3069-9]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 07/01/2019] [Indexed: 06/10/2023]
Abstract
We theoretically investigate the problem of an electron confined to a nanohelix between two parallel gates modelled as charged wires. The double-gated nanohelix system is a binary superlattice with properties highly sensitive to the gate voltages. In particular, the band structure exhibits energy band crossings for certain combinations of gate voltages, which could lead to quasi-relativistic Dirac-like phenomena. Our analysis for optical transitions induced by linearly and circularly polarized light suggests that a double-gated nanohelix can be used for versatile optoelectronic applications.
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