English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/85690
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

High-pressure lattice dynamics in wurtzite and rocksalt indium nitride investigated by means of Raman spectroscopy

AuthorsIbáñez Insa, Jordi ; Oliva, Ramón; Manjón, F. J.; Segura, A.; Yamaguchi, T.; Nanishi, Y.; Cuscó, Ramón ; Artús, Lluís
Issue Date2013
PublisherAmerican Institute of Physics
CitationPhysical Review B - Condensed Matter and Materials Physics 88 (2013)
AbstractWe present an experimental and theoretical lattice-dynamical study of InN at high hydrostatic pressures. We perform Raman scattering measurements on five InN epilayers, with different residual strain and free electron concentrations. The experimental results are analyzed in terms of ab initio lattice-dynamical calculations on both wurtzite InN (w-InN) and rocksalt InN (rs-InN) as a function of pressure. Experimental and theoretical pressure coefficients of the optical modes in w-InN are compared, and the role of residual strain on the measured pressure coefficients is analyzed. In the case of the LO band, we analyze and discuss its pressure behavior considering the double-resonance mechanism responsible for the selective excitation of LO phonons with large wave vectors in w-InN. The pressure behavior of the L- coupled mode observed in a heavily doped n-type sample allows us to estimate the pressure dependence of the electron effective mass in w-InN. The results thus obtained are in good agreement with k·p theory. The wurtzite-to-rocksalt phase transition on the upstroke cycle and the rocksalt-to-wurtzite backtransition on the downstroke cycle are investigated, and the Raman spectra of both phases are interpreted in terms of DFT lattice-dynamical calculations. © 2013 American Physical Society.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.88.115202
URIhttp://hdl.handle.net/10261/85690
DOI10.1103/PhysRevB.88.115202
Identifiersdoi: 10.1103/PhysRevB.88.115202
issn: 1098-0121
Appears in Collections:(ICTJA) Artículos
Files in This Item:
File Description SizeFormat 
Cusco_physical_review_b_2013_88_115202.pdf1,21 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.