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dc.contributor.author | Matteis, Diego de | es_ES |
dc.contributor.author | Luca, Marta De | es_ES |
dc.contributor.author | Fadaly, Elham M. T. | es_ES |
dc.contributor.author | Verheijen, Marcel A. | es_ES |
dc.contributor.author | López Suárez, Miquel | es_ES |
dc.contributor.author | Rurali, Riccardo | es_ES |
dc.contributor.author | Bakkers, Erik P. A. M. | es_ES |
dc.contributor.author | Zardo, Ilaria | es_ES |
dc.date.accessioned | 2021-03-04T15:35:49Z | - |
dc.date.available | 2021-03-04T15:35:49Z | - |
dc.date.issued | 2020-06-23 | - |
dc.identifier.citation | ACS Nano 14(6): 6845-6856 (2020) | es_ES |
dc.identifier.issn | 1936-0851 | - |
dc.identifier.uri | http://hdl.handle.net/10261/232949 | - |
dc.description.abstract | Recent advances in nanowire synthesis have enabled the realization of crystal phases that in bulk are attainable only under extreme conditions, i.e., high temperature and/or high pressure. For group IV semiconductors this means access to hexagonal-phase SixGe1–x nanostructures (with a 2H type of symmetry), which are predicted to have a direct band gap for x up to 0.5–0.6 and would allow the realization of easily processable optoelectronic devices. Exploiting the quasi-perfect lattice matching between GaAs and Ge, we synthesized hexagonal-phase GaAs-Ge and GaAs-SixGe1–x core–shell nanowires with x up to 0.59. By combining position-, polarization-, and excitation wavelength-dependent μ-Raman spectroscopy studies with first-principles calculations, we explore the full lattice dynamics of these materials. In particular, by obtaining frequency–composition calibration curves for the phonon modes, investigating the dependence of the phononic modes on the position along the nanowire, and exploiting resonant Raman conditions to unveil the coupling between lattice vibrations and electronic transitions, we lay the grounds for a deep understanding of the phononic properties of 2H-SixGe1–x nanostructured alloys and of their relationship with crystal quality, chemical composition, and electronic band structure. | es_ES |
dc.description.sponsorship | This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 756365). M.D.L. acknowledges support from the Swiss National Science Foundation Ambizione grant (grant no. PZ00P2_179801). R.R. acknowledges financial support by the Ministerio de Economı́a, Industria y Competitividad (MINECO) under grant FEDER-MAT2017-90024-P and the Severo Ochoa Centres of Excellence Program under grant SEV-2015-0496 and by the Generalitat de Catalunya under grant no. 2017 SGR 1506. E.P.A.M.B. and E.M.T.F. acknowledge European Union’s Horizon 2020 research and innovation program under grant agreement no. 735008 (SiLAS). E.P.A.M.B. and M.A.V. acknowledge Solliance, a solar energy RD initiative of ECN, TNO, Holst, TU/e, IMEC, Forschungszentrum Jülich, and the Dutch province of Noord-Brabant for funding the TEM facility. R.R. thanks Silvana Botti for useful discussions. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Chemical Society | es_ES |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/756365 | es_ES |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-90024-P | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2015-0496 | es_ES |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/735008 | es_ES |
dc.relation.isversionof | Publisher's version | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | Raman spectroscopy | es_ES |
dc.subject | Nanowires | es_ES |
dc.subject | Hexagonal (lonsdaleite) SiGe | es_ES |
dc.subject | Resonant Raman | es_ES |
dc.subject | Phonons | es_ES |
dc.subject | Crystal structure transfer | es_ES |
dc.title | Probing Lattice Dynamics and Electronic Resonances in Hexagonal Ge and SixGe1–x Alloys in Nanowires by Raman Spectroscopy | es_ES |
dc.type | artículo | es_ES |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1021/acsnano.0c00762 | es_ES |
dc.rights.license | https://pubs.acs.org/page/policy/authorchoice_termsofuse.html | es_ES |
dc.contributor.funder | European Research Council | es_ES |
dc.contributor.funder | Swiss National Science Foundation | es_ES |
dc.contributor.funder | Ministerio de Economía, Industria y Competitividad (España) | es_ES |
dc.contributor.funder | Generalitat de Catalunya | es_ES |
dc.contributor.funder | European Commission | es_ES |
dc.relation.csic | Sí | es_ES |
oprm.item.hasRevision | no ko 0 false | * |
dc.identifier.funder | http://dx.doi.org/10.13039/501100010198 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100000781 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100000780 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100002809 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
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