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High-pressure vibrational and optical study of Bi2Te3

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High-pressure vibrational and optical study of Bi2Te3

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dc.contributor.author Vilaplana Cerda, Rosario Isabel es_ES
dc.contributor.author Gomis Hilario, Oscar es_ES
dc.contributor.author Manjón Herrera, Francisco Javier es_ES
dc.contributor.author Segura, A. es_ES
dc.contributor.author Pérez-González, E. es_ES
dc.contributor.author Rodríguez-Hernández, P. es_ES
dc.contributor.author Muñoz, A. es_ES
dc.contributor.author González, J. es_ES
dc.contributor.author Marín-Borrás, V. es_ES
dc.contributor.author Muñoz-Sanjosé, V. es_ES
dc.contributor.author Drasar, C. es_ES
dc.contributor.author Kucek, V. es_ES
dc.date.accessioned 2015-03-18T10:33:15Z
dc.date.available 2015-03-18T10:33:15Z
dc.date.issued 2011-09-09
dc.identifier.issn 1098-0121
dc.identifier.uri http://hdl.handle.net/10251/48119
dc.description.abstract We report an experimental and theoretical lattice dynamics study of bismuth telluride (Bi2Te3) up to 23 GPa together with an experimental and theoretical study of the optical absorption and reflection up to 10 GPa. The indirect bandgap of the low-pressure rhombohedral (R-3m) phase (alpha-Bi2Te3) was observed to decrease with pressure at a rate of -6meV/GPa. In regard to lattice dynamics, Raman-active modes of a-Bi2Te3 were observed up to 7.4 GPa. The pressure dependence of their frequency and width provides evidence of the presence of an electronic-topological transition around 4.0 GPa. Above 7.4 GPa a phase transition is detected to the C2/m structure. On further increasing pressure two additional phase transitions, attributed to the C2/c and disordered bcc (Im-3m) phases, have been observed near 15.5 and 21.6 GPa in good agreement with the structures recently observed by means of x-ray diffraction at high pressures in Bi2Te3. After release of pressure the sample reverts back to the original rhombohedral phase after considerable hysteresis. Raman-and IR-mode symmetries, frequencies, and pressure coefficients in the different phases are reported and discussed. es_ES
dc.description.sponsorship This work has been done under financial support from Spanish MICINN under projects MAT2008-06873-C02-02, MAT2007-66129, Prometeo/2011-035, MAT2010-21270-C04-03/04, and CSD2007-00045 and supported by the Ministry of Education, Youth and Sports of the Czech Republic (MSM 0021627501). E P-G acknowledges the financial support of the Spanish MEC under a FPI fellowship. Super-computer time has been provided by the Red Espanola de Supercomputacion (RES) and the MALTA cluster. en_EN
dc.language Inglés es_ES
dc.publisher American Physical Society es_ES
dc.relation.ispartof Physical Review B es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Electronic topological transition es_ES
dc.subject Initio molecular-dynamics es_ES
dc.subject Total-Energy calculations es_ES
dc.subject Augmented-wave method es_ES
dc.subject Single dirac cone es_ES
dc.subject Thermoelectric properties es_ES
dc.subject Phase-transition es_ES
dc.subject Bismuth telluride es_ES
dc.subject Hydrostatic pressure es_ES
dc.subject Basis-set es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title High-pressure vibrational and optical study of Bi2Te3 es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1103/PhysRevB.84.104112
dc.relation.projectID info:eu-repo/grantAgreement/MEC//MAT2007-66129/ES/OXIDOS SEMICONDUCTORES II-VI PARA LA OPTOELECTRONICA UV Y LA ESPINTRONICA/ / es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MSMT//0021627501/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MEC//CSD2007-00045/ES/MATERIA A ALTA PRESION/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MICINN//MAT2008-06873-C02-02/ES/SEMICONDUCTORES MAGNETICOS DE GAP ANCHO (ZNM)O (M:CO,MN,FE) Y SUS FASES DE ALTA PRESION. DEPOSICION E CAPA DELGADA Y PROPIEDADES ESTRUCTURALES Y MAGNETO-OPTICAS/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MICINN//MAT2010-21270-C04-03/ES/MATERIALES, NANOMATERIALES Y AGREGRADOS BAJO CONDICIONES EXTREMAS. PROPIEDADES ELECTRONICAS Y DINAMICAS DESDE METODOS AB INITIO/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Centro de Tecnologías Físicas: Acústica, Materiales y Astrofísica - Centre de Tecnologies Físiques: Acústica, Materials i Astrofísica es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Diseño para la Fabricación y Producción Automatizada - Institut de Disseny per a la Fabricació i Producció Automatitzada es_ES
dc.description.bibliographicCitation Vilaplana Cerda, RI.; Gomis Hilario, O.; Manjón Herrera, FJ.; Segura, A.; Pérez-González, E.; Rodríguez-Hernández, P.; Muñoz, A.... (2011). High-pressure vibrational and optical study of Bi2Te3. Physical Review B. 84:104112-1-104112-13. https://doi.org/10.1103/PhysRevB.84.104112 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://journals.aps.org/prb/pdf/10.1103/PhysRevB.84.104112 es_ES
dc.description.upvformatpinicio 104112-1 es_ES
dc.description.upvformatpfin 104112-13 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 84 es_ES
dc.relation.senia 196337
dc.identifier.eissn 1550-235X
dc.contributor.funder Ministry of Education, Youth and Sports, República Checa es_ES
dc.contributor.funder Ministerio de Educación y Ciencia es_ES
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