dc.contributor.author | Downing, CA | |
dc.contributor.author | Robinson, MG | |
dc.contributor.author | Portnoi, ME | |
dc.date.accessioned | 2016-11-01T10:16:28Z | |
dc.date.issued | 2016-10-13 | |
dc.description.abstract | Subjecting a nanohelix to a transverse electric field gives rise to superlattice behavior with tunable electronic properties. We theoretically investigate such a system and find Bloch oscillations and negative differential conductance when a longitudinal electric field (along the nanohelix axis) is also applied. Furthermore, we study dipole transitions across the transverse-electric-field-induced energy gap, which can be tuned to the eulogized terahertz frequency range by experimentally attainable external fields. We also reveal a photogalvanic effect by shining circularly polarized light onto our helical quantum wire. | en_GB |
dc.description.sponsorship | We acknowledge financial support from the CNRS and from the ANR under Grant No. ANR-14-CE26-0005 Q-MetaMat, as well as the EU H2020 RISE project CoExAN (Grant No. H2020-644076), EU FP7 ITN NOTEDEV (Grant No. FP7-607521), and the FP7 IRSES projects CANTOR (Grant No. FP7-612285), QOCaN (Grant No. FP7-316432), and InterNoM (Grant No. FP7-612624). | en_GB |
dc.identifier.citation | Vol. 94, No. 15, Article Number: 155306 | en_GB |
dc.identifier.doi | 10.1103/PhysRevB.94.155306 | |
dc.identifier.uri | http://hdl.handle.net/10871/24189 | |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.rights | This is the final version of the article. Available from the American Physical Society via the DOI in this record. | en_GB |
dc.subject | Superlattice | en_GB |
dc.subject | Nanohelix | en_GB |
dc.subject | Bloch oscillations | en_GB |
dc.subject | THz radiation | en_GB |
dc.title | Nanohelices as superlattices: Bloch oscillations and electric dipole transitions | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2016-11-01T10:16:28Z | |
dc.identifier.issn | 0163-1829 | |
exeter.article-number | 155306 | en_GB |
dc.identifier.eissn | 1550-235X | |
dc.identifier.journal | Physical Review B - Condensed Matter and Materials Physics | en_GB |