Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers

Shan Jiang; Chang Liu; Huibo Cao; Turan Birol; Jared M. Allred; Wei Tian; Lian Liu; Kyuil Cho; Matthew J. Krogstad; Jie Ma; Keith M. Taddei; Makariy A. Tanatar; Moritz Hoesch; Ruslan Prozorov; Stephan Rosenkranz; Yasutomo J. Uemura; Gabriel Kotliar; Ni Ni

doi:10.1103/PhysRevB.93.054522

Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers

Shan Jiang, Chang Liu, Huibo Cao, Turan Birol, Jared M. Allred, Wei Tian, Lian Liu, Kyuil Cho, Matthew J. Krogstad, Jie Ma, Keith M. Taddei, Makariy A. Tanatar, Moritz Hoesch, Ruslan Prozorov, Stephan Rosenkranz, Yasutomo J. Uemura, Gabriel Kotliar, Ni Ni

School of Arts and Sciences, New High Energy Theory Center

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

We report a study of the Ca0.73La0.27FeAs2 single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic phase transition at 54 K, below which spins order 45 away from the stripe direction. Furthermore, we demonstrate this material is substantially structurally untwinned at ambient pressure with the formation of spin rotation walls (S walls). Finally, in addition to the central-hole and corner-electron Fermi pockets usually appearing in Fe pnictide superconductors, angle-resolved photoemission measurements resolve a fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.

Original language	English (US)
Article number	054522
Journal	Physical Review B
Volume	93
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.93.054522
State	Published - Feb 26 2016

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.93.054522

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Jiang, S., Liu, C., Cao, H., Birol, T., Allred, J. M., Tian, W., Liu, L., Cho, K., Krogstad, M. J., Ma, J., Taddei, K. M., Tanatar, M. A., Hoesch, M., Prozorov, R., Rosenkranz, S., Uemura, Y. J., Kotliar, G., & Ni, N. (2016). Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers. Physical Review B, 93(5), Article 054522. https://doi.org/10.1103/PhysRevB.93.054522

@article{c6f433ee46ee49ee9f068ffe5568611c,

title = "Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers",

abstract = "We report a study of the Ca0.73La0.27FeAs2 single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic phase transition at 54 K, below which spins order 45 away from the stripe direction. Furthermore, we demonstrate this material is substantially structurally untwinned at ambient pressure with the formation of spin rotation walls (S walls). Finally, in addition to the central-hole and corner-electron Fermi pockets usually appearing in Fe pnictide superconductors, angle-resolved photoemission measurements resolve a fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.",

author = "Shan Jiang and Chang Liu and Huibo Cao and Turan Birol and Allred, {Jared M.} and Wei Tian and Lian Liu and Kyuil Cho and Krogstad, {Matthew J.} and Jie Ma and Taddei, {Keith M.} and Tanatar, {Makariy A.} and Moritz Hoesch and Ruslan Prozorov and Stephan Rosenkranz and Uemura, {Yasutomo J.} and Gabriel Kotliar and Ni Ni",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = feb,

day = "26",

doi = "10.1103/PhysRevB.93.054522",

language = "English (US)",

volume = "93",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Institute of Physics",

number = "5",

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Jiang, S, Liu, C, Cao, H, Birol, T, Allred, JM, Tian, W, Liu, L, Cho, K, Krogstad, MJ, Ma, J, Taddei, KM, Tanatar, MA, Hoesch, M, Prozorov, R, Rosenkranz, S, Uemura, YJ, Kotliar, G & Ni, N 2016, 'Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers', Physical Review B, vol. 93, no. 5, 054522. https://doi.org/10.1103/PhysRevB.93.054522

TY - JOUR

T1 - Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers

AU - Jiang, Shan

AU - Liu, Chang

AU - Cao, Huibo

AU - Birol, Turan

AU - Allred, Jared M.

AU - Tian, Wei

AU - Liu, Lian

AU - Cho, Kyuil

AU - Krogstad, Matthew J.

AU - Ma, Jie

AU - Taddei, Keith M.

AU - Tanatar, Makariy A.

AU - Hoesch, Moritz

AU - Prozorov, Ruslan

AU - Rosenkranz, Stephan

AU - Uemura, Yasutomo J.

AU - Kotliar, Gabriel

AU - Ni, Ni

PY - 2016/2/26

Y1 - 2016/2/26

N2 - We report a study of the Ca0.73La0.27FeAs2 single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic phase transition at 54 K, below which spins order 45 away from the stripe direction. Furthermore, we demonstrate this material is substantially structurally untwinned at ambient pressure with the formation of spin rotation walls (S walls). Finally, in addition to the central-hole and corner-electron Fermi pockets usually appearing in Fe pnictide superconductors, angle-resolved photoemission measurements resolve a fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.

AB - We report a study of the Ca0.73La0.27FeAs2 single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic phase transition at 54 K, below which spins order 45 away from the stripe direction. Furthermore, we demonstrate this material is substantially structurally untwinned at ambient pressure with the formation of spin rotation walls (S walls). Finally, in addition to the central-hole and corner-electron Fermi pockets usually appearing in Fe pnictide superconductors, angle-resolved photoemission measurements resolve a fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.

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ER -

Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers

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