Itinerant electrons, local moments, and magnetic correlations in the pnictide superconductors CeFeAsO₁₋xFxand Sr(Fe₁₋xCox)₂As₂

Vilmercati, Paolo; Fedorov, Alexei; Bondino, Federica; Offi, Francesco; Panaccione, Giancarlo; Lacovig, Paolo; Simonelli, Laura; McGuire, Michael A.; Sefat, Athena S. M.; Mandrus, David; Sales, Brian C.; Egami, Takeshi; Ku, Wei; Mannella, Norman

doi:10.1103/PhysRevB.85.220503

Title: Itinerant electrons, local moments, and magnetic correlations in the pnictide superconductors CeFeAsO₁₋_xF_xand Sr(Fe₁₋_xCo_x)₂As₂

Journal Article · Fri Jun 15 00:00:00 EDT 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.220503· OSTI ID:1103556

Vilmercati, Paolo; Fedorov, Alexei; Bondino, Federica; Offi, Francesco; Panaccione, Giancarlo; Lacovig, Paolo; Simonelli, Laura; McGuire, Michael A.; Sefat, Athena S. M.; Mandrus, David; Sales, Brian C.; Egami, Takeshi; Ku, Wei; Mannella, Norman

A direct and element-specific measurement of the local Fe spin moment has been provided by analyzing the Fe 3s core level photoemission spectra in the parent and optimally doped CeFeAsO₁₋_xF_x (x = 0, 0.11) and Sr(Fe₁₋_xCo_x)2As2 (x = 0, 0.10) pnictides. The rapid time scales of the photoemission process allowed the detection of large local spin moments fluctuating on a 10⁻¹⁵ s time scale in the paramagnetic, antiferromagnetic, and superconducting phases, indicative of the occurrence of ubiquitous strong Hund's magnetic correlations. The magnitude of the spin moment is found to vary significantly among different families, 1.3μ_B in CeFeAsO and 2.1μB in SrFe₂As₂. Surprisingly, the spin moment is found to decrease considerably in the optimally doped samples, 0.9μ_B in CeFeAsO₀.₈₉F₀.₁₁ and 1.3μ_B in Sr(Fe₀.₉Co₀.₁)₂As₂. The strong variation of the spin moment against doping and material type indicates that the spin moments and the motion of itinerant electrons are influenced reciprocally in a self-consistent fashion, reflecting the strong competition between the antiferromagnetic superexchange interaction among the spin moments and the kinetic energy gain of the itinerant electrons in the presence of a strong Hund's coupling. By describing the evolution of the magnetic correlations concomitant with the appearance of superconductivity, these results constitute a fundamental step toward attaining a correct description of the microscopic mechanisms shaping the electronic properties in the pnictides, including magnetism and high-temperature superconductivity.

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Sponsoring Organization:: USDOE

OSTI ID:: 1103556

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Vol. 85 Journal Issue: 22; ISSN 1098-0121

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 41 works

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References (37)

Band structure and itinerant magnetism in quantum critical ${NbFe}_{2}$ Subedi, Alaska; Singh, David J. Physical Review B, Vol. 81, Issue 2 https://doi.org/10.1103/PhysRevB.81.024422	journal	January 2010
Coexistence of itinerant electrons and local moments in iron-based superconductors Kou, Su-Peng; Li, Tao; Weng, Zheng-Yu EPL (Europhysics Letters), Vol. 88, Issue 1 https://doi.org/10.1209/0295-5075/88/17010	journal	October 2009
Orbital ordering and unfrustrated $(π, 0)$ magnetism from degenerate double exchange in the iron pnictides Lv, Weicheng; Krüger, Frank; Phillips, Philip Physical Review B, Vol. 82, Issue 4 https://doi.org/10.1103/PhysRevB.82.045125	journal	July 2010
Final-state screening effect in the 3 s photoemission spectra of Mn and Fe insulating compounds Gweon, Gey-Hong; Park, Je-Geun; Oh, S. -J. Physical Review B, Vol. 48, Issue 11 https://doi.org/10.1103/PhysRevB.48.7825	journal	September 1993
The magnetism of iron Hubbard, J. Physical Review B, Vol. 19, Issue 5 https://doi.org/10.1103/PhysRevB.19.2626	journal	March 1979
Itinerant Magnetic Excitations in Antiferromagnetic ${CaFe}_{2} {As}_{2}$ Diallo, S. O.; Antropov, V. P.; Perring, T. G. Physical Review Letters, Vol. 102, Issue 18 https://doi.org/10.1103/PhysRevLett.102.187206	journal	May 2009
Superconductivity and spin fluctuations Li, Shiliang; Dai, Pengcheng Frontiers of Physics, Vol. 6, Issue 4 https://doi.org/10.1007/s11467-011-0221-0	journal	December 2011
Spin polarization of the metallic Fe 3 s photoemission spectrum Hillebrecht, F. U.; Jungblut, R.; Kisker, E. Physical Review Letters, Vol. 65, Issue 19 https://doi.org/10.1103/PhysRevLett.65.2450	journal	November 1990
The magnetism of iron and other 3-d transition metals Capellmann, H. Journal of Magnetism and Magnetic Materials, Vol. 28, Issue 3 https://doi.org/10.1016/0304-8853(82)90057-9	journal	September 1982
Spin-resolved and high-energy-resolution XPS studies of the 3 s and 2 s levels of metallic cobalt Van Campen, D. G.; Klebanoff, L. E. Physical Review B, Vol. 49, Issue 3 https://doi.org/10.1103/PhysRevB.49.2040	journal	January 1994
Spin waves and magnetic exchange interactions in CaFe2As2 Zhao, Jun; Adroja, D. T.; Yao, Dao-Xin Nature Physics, Vol. 5, Issue 8 https://doi.org/10.1038/nphys1336	journal	July 2009
Single-Site Functional-Integral Approach to Itinerant-Electron Ferromagnetism Hasegawa, Hideo Journal of the Physical Society of Japan, Vol. 46, Issue 5 https://doi.org/10.1143/JPSJ.46.1504	journal	May 1979
Nature of magnetic excitations in superconducting BaFe1.9Ni0.1As2 Liu, Mengshu; Harriger, Leland W.; Luo, Huiqian Nature Physics, Vol. 8, Issue 5 https://doi.org/10.1038/nphys2268	journal	March 2012
Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy Gretarsson, H.; Lupascu, A.; Kim, Jungho Physical Review B, Vol. 84, Issue 10 https://doi.org/10.1103/PhysRevB.84.100509	journal	September 2011
Influence of the rare-earth element on the effects of the structural and magnetic phase transitions in CeFeAsO, PrFeAsO and NdFeAsO McGuire, Michael A.; Hermann, Raphaël P.; Sefat, Athena S. New Journal of Physics, Vol. 11, Issue 2 https://doi.org/10.1088/1367-2630/11/2/025011	journal	February 2009
Evidence for Strong Itinerant Spin Fluctuations in the Normal State of ${CeFeAsO}_{0.89} F_{0.11}$ Iron-Oxypnictide Superconductors Bondino, F.; Magnano, E.; Malvestuto, M. Physical Review Letters, Vol. 101, Issue 26 https://doi.org/10.1103/PhysRevLett.101.267001	journal	December 2008
Microscopic origin of magnetism and magnetic interactions in ferropnictides Johannes, M. D.; Mazin, I. I. Physical Review B, Vol. 79, Issue 22 https://doi.org/10.1103/PhysRevB.79.220510	journal	June 2009
Dual character of magnetism in ${EuFe}_{2} {As}_{2}$ : Optical spectroscopic and density-functional calculation study Moon, S. J.; Shin, J. H.; Parker, D. Physical Review B, Vol. 81, Issue 20 https://doi.org/10.1103/PhysRevB.81.205114	journal	May 2010
Dichotomy between Large Local and Small Ordered Magnetic Moments in Iron-Based Superconductors Hansmann, P.; Arita, R.; Toschi, A. Physical Review Letters, Vol. 104, Issue 19 https://doi.org/10.1103/PhysRevLett.104.197002	journal	May 2010
Experimental setup for high energy photoemission using synchrotron radiation Torelli, P.; Sacchi, M.; Cautero, G. Review of Scientific Instruments, Vol. 76, Issue 2 https://doi.org/10.1063/1.1852323	journal	February 2005
Electronic correlations in the superconductor $La Fe As O_{0.89} F_{0.11}$ with low carrier density Sefat, Athena S.; McGuire, Michael A.; Sales, Brian C. Physical Review B, Vol. 77, Issue 17 https://doi.org/10.1103/PhysRevB.77.174503	journal	May 2008
Fine structures in the X-ray photoemission spectra of MnO, FeO, CoO, and NiO single crystals Parmigiani, Fulvio; Sangaletti, Luigi Journal of Electron Spectroscopy and Related Phenomena, Vol. 98-99 https://doi.org/10.1016/S0368-2048(98)00294-1	journal	January 1999
Orbital ordering induces structural phase transition and the resistivity anomaly in iron pnictides Lv, Weicheng; Wu, Jiansheng; Phillips, Philip Physical Review B, Vol. 80, Issue 22 https://doi.org/10.1103/PhysRevB.80.224506	journal	December 2009
A proper Anderson Hamiltonian treatment of the 3s photoelectron spectra of MnO, FeO, CoO and NiO Sangaletti, L.; Depero, L. E.; Bagus, P. S. Chemical Physics Letters, Vol. 245, Issue 4-5 https://doi.org/10.1016/0009-2614(95)01011-W	journal	November 1995
Magnetic and superconducting instabilities in a hybrid model of itinerant/localized electrons for iron pnictides You, Yi-Zhuang; Yang, Fan; Kou, Su-Peng Physical Review B, Vol. 84, Issue 5 https://doi.org/10.1103/PhysRevB.84.054527	journal	August 2011
Electronic Correlations and Unconventional Spectral Weight Transfer in the High-Temperature Pnictide ${BaFe}_{2 - x} {Co}_{x} {As}_{2}$ Superconductor Using Infrared Spectroscopy Schafgans, A. A.; Moon, S. J.; Pursley, B. C. Physical Review Letters, Vol. 108, Issue 14 https://doi.org/10.1103/PhysRevLett.108.147002	journal	April 2012
Evidence for a localized magnetic moment in paramagnetic α-Mn from multiplet splitting McFeely, F. R.; Kowalczyk, S. P.; Ley, L. Solid State Communications, Vol. 15, Issue 6 https://doi.org/10.1016/0038-1098(74)90529-8	journal	September 1974
Multiplet Splitting of Core-Electron Binding Energies in Transition-Metal Ions Fadley, C. S.; Shirley, D. A.; Freeman, A. J. Physical Review Letters, Vol. 23, Issue 24 https://doi.org/10.1103/PhysRevLett.23.1397	journal	December 1969
Quantum criticality in NbFe $_{2}$ induced by zero carrier velocity Neal, Brian P.; Ylvisaker, Erik R.; Pickett, Warren E. Physical Review B, Vol. 84, Issue 8 https://doi.org/10.1103/PhysRevB.84.085133	journal	August 2011
Magnetic moments and x-ray photoelectron spectroscopy splittings in Fe 3s core levels of materials containing Fe van Acker, J. F.; Stadnik, Z. M.; Fuggle, J. C. Physical Review B, Vol. 37, Issue 12 https://doi.org/10.1103/PhysRevB.37.6827	journal	April 1988
A first-principles theory of ferromagnetic phase transitions in metals Gyorffy, B. L.; Pindor, A. J.; Staunton, J. Journal of Physics F: Metal Physics, Vol. 15, Issue 6 https://doi.org/10.1088/0305-4608/15/6/018	journal	June 1985
Magnetism of iron. II Hubbard, J. Physical Review B, Vol. 20, Issue 11 https://doi.org/10.1103/PhysRevB.20.4584	journal	December 1979
Coherence–incoherence crossover in the normal state of iron oxypnictides and importance of Hund's rule coupling Haule, K.; Kotliar, G. New Journal of Physics, Vol. 11, Issue 2 https://doi.org/10.1088/1367-2630/11/2/025021	journal	February 2009
Superconductivity at 22 K in Co-Doped ${BaFe}_{2} {As}_{2}$ Crystals Sefat, Athena S.; Jin, Rongying; McGuire, Michael A. Physical Review Letters, Vol. 101, Issue 11 https://doi.org/10.1103/PhysRevLett.101.117004	journal	September 2008
X-ray photoelectron spectroscopic study of ordered stoichiometric FeAl fractured in situ Oku, Masaoki; Masahashi, Naoya; Hanada, Shuji Journal of Alloys and Compounds, Vol. 413, Issue 1-2 https://doi.org/10.1016/j.jallcom.2005.05.043	journal	March 2006
Unified Picture for Magnetic Correlations in Iron-Based Superconductors Yin, Wei-Guo; Lee, Chi-Cheng; Ku, Wei Physical Review Letters, Vol. 105, Issue 10 https://doi.org/10.1103/PhysRevLett.105.107004	journal	September 2010
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides Johnston, David C. Advances in Physics, Vol. 59, Issue 6 https://doi.org/10.1080/00018732.2010.513480	journal	October 2010

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Title: Itinerant electrons, local moments, and magnetic correlations in the pnictide superconductors CeFeAsO₁₋_xF_xand Sr(Fe₁₋_xCo_x)₂As₂