Crystal structure of HgGa2Se4 under compression

Gomis Oscar; Vilaplana Rosario Isabel; Manjon Francisco Javier; Santamaria-Perez David; Errandonea Daniel J.H.; Perez-Gonzalez Eduardo; Lopez-Solano Javier; Rodriguez-Hernandez Placida Rogelio; Munoz Alfonso Gonzalez; Tiginyanu Ion; Ursachi Veaceslav

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754

SM ISO690:2012

GOMIS, Oscar, VILAPLANA, Rosario Isabel, MANJON, Francisco Javier, SANTAMARIA-PEREZ, David, ERRANDONEA, Daniel J.H., PEREZ-GONZALEZ, Eduardo, LOPEZ-SOLANO, Javier, RODRIGUEZ-HERNANDEZ, Placida Rogelio, MUNOZ, Alfonso Gonzalez, TIGINYANU, Ion, URSACHI, Veaceslav. Crystal structure of HgGa2Se4 under compression. In: Materials Research Bulletin, 2013, vol. 48, pp. 2128-2133. ISSN 0025-5408. DOI: https://doi.org/10.1016/j.materresbull.2013.02.037

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Materials Research Bulletin

Volumul 48 / 2013 / ISSN 0025-5408

Crystal structure of HgGa₂Se₄ under compression

DOI:https://doi.org/10.1016/j.materresbull.2013.02.037

Pag. 2128-2133

Gomis Oscar¹, Vilaplana Rosario Isabel¹, Manjon Francisco Javier¹, Santamaria-Perez David²³, Errandonea Daniel J.H.³, Perez-Gonzalez Eduardo⁴, Lopez-Solano Javier⁴, Rodriguez-Hernandez Placida Rogelio⁴, Munoz Alfonso Gonzalez⁴, Tiginyanu Ion⁵, Ursachi Veaceslav⁵

¹ Universitat Politècnica de València,
² Universidad Complutense de Madrid,
³ Universitat de València,
⁴ Universidad de La Laguna,
⁵ Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 23 martie 2018

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We report on high-pressure x-ray diffraction measurements up to 17.2 GPa in mercury digallium selenide (HgGa₂Se₄). The equation of state and the axial compressibilities for the low-pressure tetragonal phase have been determined and compared to related compounds. HgGa₂Se ₄ exhibits a phase transition on upstroke toward a disordered rock-salt structure beyond 17 GPa, while on downstroke it undergoes a phase transition below 2.1 GPa to a phase that could be assigned to a metastable zinc-blende structure with a total cation-vacancy disorder. Thermal annealing at low- and high-pressure shows that kinetics plays an important role on pressure-driven transitions.

Cuvinte-cheie
A. Chalcogénides, C. High pressure, C. X-ray diffraction, D. Crystal structure, D. Phase transitions

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