First principle investigations of the physical properties of hydrogen-rich MgH2

Mohammed Zarshenas, Rashid Ahmed, Mohammed Kanoun, Bakhtiar Ul Haq, Ahmad Radzi Mat Isa, Souraya Goumri-Said

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Hydrogen being a cleaner energy carrier has increased the importance of hydrogen-containing light metal hydrides, in particular those with large gravimetric hydrogen density like magnesium hydride (MgH2). In this study, density functional and density functional perturbation theories are combined to investigate the structural, elastic, thermodynamic, electronic and optical properties of MgH2. Our structural parameters calculated with those proposed by Perdew, Burke and Ernzerof generalized gradient approximation (PBE-GGA) and Wu-Cohen GGA (WC-GGA) are in agreement with experimental measurements, however the underestimated band gap values calculated using PBE-GGA and WC-GGA were greatly improved with the GGA suggested by Engle and Vosko and the modified Becke-Johnson exchange correlation potential by Trans and Blaha. As for the thermodynamic properties the specific heat values at low temperatures were found to obey the T3 rule and at higher temperatures Dulong and Petit's law. Our analysis of the optical properties of MgH2 also points to its potential application in optoelectronics. © 2013 The Royal Swedish Academy of Sciences.
Original languageEnglish (US)
Pages (from-to)065704
JournalPhysica Scripta
Volume88
Issue number6
DOIs
StatePublished - Nov 28 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'First principle investigations of the physical properties of hydrogen-rich MgH2'. Together they form a unique fingerprint.

Cite this