2021

Phonons of hexagonal BN under pressure: Effects of isotopic composition

Cuscó R, Pellicer-Porres J, Edgar JH, Li J, Segura A, Artús L. Phonons of hexagonal BN under pressure: Effects of isotopic composition. Phys Rev B. 2021;103(8):85204. doi:10.1103/PhysRevB.103.085204

Abstract

Raman scattering experiments on isotopically enriched hexagonal boron nitride have been performed under pressure up to 11 GPa at room temperature. The sublinear increase of the Raman-active E2g mode frequencies has been characterized. The pressure behavior has been analyzed by means of a bond-stiffness–bond-length scaling parameter ? which takes into consideration the vast differences in a- and c-axis compressibilities. The interlayer shear mode exhibits a ? parameter similar to that of graphite, and the mode frequency in isotopically pure samples separates faster at low pressures as a result of van der Waals interactions. Because of the extremely low a-axis compressibility, the intralayer mode exhibits a rather large scaling parameter. Within experimental uncertainties, no systematic departures related to isotopic mass have been observed.

Reference article

Access to the article via Digital.CSIC open institutional repository

In accordance with the Organic Law 3/2018, dated 5 December, on Personal Data Protection and Guarantee of Digital Rights (LOPDGDD), the General Regulation of Data Protection (RGPD) and the related legislation, GEO3BCN-CSIC undertakes to comply with the obligation of secrecy with regard to personal data and the duty to treat them confidentially after carrying out the corresponding risk analyses, in particular, in accordance with the First Additional Provision of the LOPDGDD, the security measures corresponding to those provided for in the National Security Scheme, necessary to prevent its alteration, loss, processing or unauthorised access.

Users may exercise their rights of access, rectification, cancellation, opposition, limitation or portability at any time by writing to the Secretary General of the CSIC at C/Serrano 117, 28006 MADRID (Spain), providing a photocopy of their National Identity Document (DNI) or through the CSIC’s Electronic Register, located at its Electronic Headquarters, for which they must have a recognised electronic certificate. It is possible to contact with the CSIC’s Data Protection Delegate though this email: delegadoprotecciondatos@csic.es

GEO3BCN-CSIC reserves the right to modify this Privacy Policy in order to adapt it to the latest legislations, jurisprudences or interpretations made by the Spanish Data Protection Agency. In this case, the CSIC will announce such changes, clearly indicating in advance the modifications made, and requesting, if considered necessary, their acceptance.

No

Accept

Este sitio web utiliza cookies para que usted tenga la mejor experiencia de usuario. Si continúa navegando está dando su consentimiento para la aceptación de las mencionadas cookies y la aceptación de nuestra política de cookies, pinche el enlace para mayor información.

Aviso de cookies