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

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

doi:10.1103/PhysRevB.93.054522

The structural and magnetic phase transitions in Ca_0.73La_0.27FeAs₂ with electron overdoped FeAs layers.

Journal Article · Thu Feb 25 23:00:00 EST 2016 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.93.054522· OSTI ID:1245443

Jiang, Shan ^[1]; Liu, Chang ^[2]; Cao, H. ^[3]; Birol, Turan ^[4]; Allred, Jared M. ^[5]; Tian, Wei ^[3]; Liu, Lian ^[6]; Cho, Kyuil ^[7]; Krogstad, Matthew J. ^[8]; Ma, Jie ^[3]; Taddei, Keith M. ^[8]; Tanatar, Makariy A. ^[7]; Hoesch, Moritz ^[9]; Prozorov, Ruslan ^[7]; Rosenkranz, Stephan ^[5]; Uemura, Yasutomo J. ^[6]; Kotliar, Gabriel ^[4]; Ni, Ni ^[1]

Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy and California NanoSystems Inst.
South Univ. of Science and Technology of China, Shenzhen (China). Dept. of Physics
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Columbia Univ., New York, NY (United States). Dept. of Physics
Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics
Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.

Here we report a study of the Ca_0.73La_0.27FeAs₂ single crystals. We unravel a monoclinic to triclinic phase transition at 58 K, and a paramagnetic to stripe antiferromagnetic (AFM) 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 FPS, angle-resolved photoemission (ARPES) measurements resolve a Fermiology where an extra electron pocket of mainly As chain character exists at the Brillouin zone edge.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357; SC0011978; AC02-07CH11358

OSTI ID:: 1245443

Alternate ID(s):: OSTI ID: 1239614
OSTI ID: 1249346

Journal Information:: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 93; ISSN 0163-1829

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (9)

Persistent antiferromagnetic order in heavily overdoped Ca _{1− x} La _x FeAs ₂ Martino, Edoardo; Bachmann, Maja D.; Rossi, Lidia Journal of Physics: Condensed Matter, Vol. 31, Issue 48 https://doi.org/10.1088/1361-648x/ab3b43	journal	September 2019
Correlated materials design: prospects and challenges Adler, Ran; Kang, Chang-Jong; Yee, Chuck-Hou Reports on Progress in Physics, Vol. 82, Issue 1 https://doi.org/10.1088/1361-6633/aadca4	journal	December 2018
Reemergence of superconductivity by 4 d transition-metal Pd doping in over-doped 112-type iron pnictide superconductors Ca _0.755 La _0.245 FeAs ₂ Xing, Xiangzhuo; Li, Zhanfeng; Veshchunov, Ivan New Journal of Physics, Vol. 21, Issue 9 https://doi.org/10.1088/1367-2630/ab3d75	journal	September 2019
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Neutron Spin Resonance in the 112-Type Iron-Based Superconductor Xie, Tao; Gong, Dongliang; Ghosh, Haranath Physical Review Letters, Vol. 120, Issue 13 https://doi.org/10.1103/physrevlett.120.137001	journal	March 2018
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Neutron spin resonance in the 112-type iron-based superconductor Xie, Tao; Gong, Dongliang; Ghosh, Haranath arXiv https://doi.org/10.48550/arxiv.1803.00779	text	January 2018
Correlated materials design: prospects and challenges Adler, Ran; Kang, Chang-Jong; Yee, Chuck-Hou arXiv https://doi.org/10.48550/arxiv.1807.00398	text	January 2018
Persistent antiferromagnetic order in heavily overdoped Ca$_{1-x}$La$_x$FeAs$_2$ Martino, Edoardo; Bachmann, Maja D.; Rossi, Lidia arXiv https://doi.org/10.48550/arxiv.1905.08640	text	January 2019

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