6533b825fe1ef96bd1281f0b
RESEARCH PRODUCT
High-pressure study of the infrared active modes in wurtzite and rocksalt ZnO
Alain PolianV. K. PanchalFrédéric DecrempsJulio Pellicer-porresAlfredo SeguraP. Dumassubject
010302 applied physicsMaterials scienceCondensed matter physicsInfraredbusiness.industry02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic MaterialsTransverse planesymbols.namesakeSemiconductorOpticsFrequency domainPhase (matter)[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]0103 physical sciencessymbolsPACS : 78.30.Fs 64.70.kgWavenumber0210 nano-technologyRaman spectroscopybusinessWurtzite crystal structuredescription
International audience; We present a high-pressure study of ZnO carried out in the mid- to far-infrared frequency domain with the aim of characterizing the optic modes of wurtzite and rocksalt ZnO. We obtained the pressure coefficients of the E1(TO), E1(LO), A1(TO), and A1(LO) modes of the low-pressure wurtzite phase and compare them with previous Raman measurements. The optical modes of the high-pressure rocksalt phase are infrared active, so we were able to determine their wave numbers and pressure dependencies. In the wurtzite phase, high pressure induces a slight decrease in both longitudinal and transverse effective charges. The decrease is more pronounced in the rocksalt phase.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-09-06 |