Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between and magnetic phases
Abstract
We investigate the impact of spin anisotropic interactions, promoted by spin-orbit coupling, on the magnetic phase diagram of the iron-based superconductors. Three distinct magnetic phases with Bragg peaks at (π,0) and (0, π) are possible in these systems: one C2 (i.e., orthorhombic) symmetric stripe magnetic phase and two C4 (i.e., tetragonal) symmetric magnetic phases. While the spin anisotropic interactions allow the magnetic moments to point in any direction in the C2 phase, they restrict the possible moment orientations in the C4 phases. As a result, an interesting scenario arises in which the spin anisotropic interactions favor a C2 phase, but the other spin isotropic interactions favor a C4 phase. We study this frustration via both mean-field and renormalization-group approaches. We find that, to lift this frustration, a rich magnetic landscape emerges well below the magnetic transition temperature, with interesting C2, C4, and mixed C2 – C4 phases. Near the putative magnetic quantum critical point, spin anisotropies promote a stable Gaussian fixed point in the renormalization-group flow, which is absent in the spin isotropic case, and is associated with a near-degeneracy between C2 and C4 phases. Here, we argue that this frustration is the reason why most C4 phases in themore »
- Authors:
-
- Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
- Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy; Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1464481
- Alternate Identifier(s):
- OSTI ID: 1462152
- Report Number(s):
- IS-J-9728
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1902392
- Grant/Contract Number:
- SC0012336; A9318; AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 1; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Christensen, Morten H., Orth, Peter P., Andersen, Brian M., and Fernandes, Rafael M. Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C2 and C4 magnetic phases. United States: N. p., 2018.
Web. doi:10.1103/PhysRevB.98.014523.
Christensen, Morten H., Orth, Peter P., Andersen, Brian M., & Fernandes, Rafael M. Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C2 and C4 magnetic phases. United States. https://doi.org/10.1103/PhysRevB.98.014523
Christensen, Morten H., Orth, Peter P., Andersen, Brian M., and Fernandes, Rafael M. Mon .
"Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C2 and C4 magnetic phases". United States. https://doi.org/10.1103/PhysRevB.98.014523. https://www.osti.gov/servlets/purl/1464481.
@article{osti_1464481,
title = {Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C2 and C4 magnetic phases},
author = {Christensen, Morten H. and Orth, Peter P. and Andersen, Brian M. and Fernandes, Rafael M.},
abstractNote = {We investigate the impact of spin anisotropic interactions, promoted by spin-orbit coupling, on the magnetic phase diagram of the iron-based superconductors. Three distinct magnetic phases with Bragg peaks at (π,0) and (0, π) are possible in these systems: one C2 (i.e., orthorhombic) symmetric stripe magnetic phase and two C4 (i.e., tetragonal) symmetric magnetic phases. While the spin anisotropic interactions allow the magnetic moments to point in any direction in the C2 phase, they restrict the possible moment orientations in the C4 phases. As a result, an interesting scenario arises in which the spin anisotropic interactions favor a C2 phase, but the other spin isotropic interactions favor a C4 phase. We study this frustration via both mean-field and renormalization-group approaches. We find that, to lift this frustration, a rich magnetic landscape emerges well below the magnetic transition temperature, with interesting C2, C4, and mixed C2 – C4 phases. Near the putative magnetic quantum critical point, spin anisotropies promote a stable Gaussian fixed point in the renormalization-group flow, which is absent in the spin isotropic case, and is associated with a near-degeneracy between C2 and C4 phases. Here, we argue that this frustration is the reason why most C4 phases in the iron pnictides only appear inside the C2 phase, and discuss additional manifestations of this frustration in the phase diagrams of these materials.},
doi = {10.1103/PhysRevB.98.014523},
journal = {Physical Review B},
number = 1,
volume = 98,
place = {United States},
year = {Mon Jul 30 00:00:00 EDT 2018},
month = {Mon Jul 30 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
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