Epitaxial Growth of ?-SnS on PbS Substrates
CRYSTAL GROWTH & DESIGN(2023)
摘要
Epitaxial growth of the newly discovered metastable cubic tin sulfide (pi-SnS) material was studied theoretically and experimentally. Lead sulfide (PbS) substrates possess a small lattice mismatch with pi-SnS and are therefore suitable substrates for epitaxial growth. Very recently, epitaxial growth of pi-SnS(111) on PbS(111) and pi-SnS(110) on PbS(110) was reported. The interfacial energies of pi-SnS(111) on PbS(111), as well as pi-SnS(100) on PbS(100), were calculated and found to be smaller than their corresponding pristine surface energies, which give rise to the stable epitaxial growth of pi-SnS on PbS. Moreover, we experimentally confirmed the epitaxial growth of pi-SnS(100) onto PbS(100) as predicted by the theoretical results. These results establish the pathway of epitaxial growth of pi-SnS compact thin films in desired orientations and thus bring their applications closer.
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