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Pressure-induced collapsed-tetragonal phase in SrCo2As2

TitlePressure-induced collapsed-tetragonal phase in SrCo2As2
Publication TypeJournal Article
Year of Publication2015
AuthorsJayasekara, WT, Kaluarachchi, US, Ueland, BG, Pandey, A, Lee, YB, Taufour, V, Sapkota, A, Kothapalli, K, Sangeetha, NS, Fabbris, G, Veiga, LSI, Feng, YJ, Santos, AM dos, Bud'ko, SL, Harmon, BN, Canfield, PC, Johnston, DC, Kreyssig, A, Goldman, AI
JournalPhysical Review B
Date Published12
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000366085400002
Keywordsgpa, high-temperature superconductivity, iron

= 1.8 K. The resistivity data also show signatures consistent with a pressure-induced phase transition for p greater than or similar to 5.5 GPa. Single-crystal neutron diffraction measurements performed up to 1.1 GPa in the T phase found no evidence of stripe-type or A-type antiferromagnetic ordering down to 10 K. Spin-polarized total-energy calculations demonstrate that the cT phase is the stable phase at high pressure with a c/a ratio of 2.54. Furthermore, these calculations indicate that the cT phase of SrCo2As2 should manifest either A-type antiferromagnetic or ferromagnetic order.

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