Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1-xPx)2
Abstract
Unconventional superconductivity arises at the border between the strong coupling regime with local magnetic moments and the weak coupling regime with itinerant electrons, and stems from the physics of criticality that dissects the two. Unveiling the nature of the quasiparticles close to quantum criticality is fundamental to understand the phase diagram of quantum materials. Here, using resonant inelastic x-ray scattering (RIXS) and Fe-Kβ emission spectroscopy (XES), we visualize the coexistence and evolution of local magnetic moments and collective spin excitations across the superconducting dome in isovalently-doped BaFe2(As1-xPx)2 (0.00 ≤ x ≤0.52). Collective magnetic excitations resolved by RIXS are gradually hardened, whereas XES reveals a strong suppression of the local magnetic moment upon doping. This relationship is captured by an intermediate coupling theory, explicitly accounting for the partially localized and itinerant nature of the electrons in Fe pnictides. Finally, our work identifies a local-itinerant spin fluctuations channel through which the local moments transfer spin excitations to the particle-hole (paramagnons) continuum across the superconducting dome.
- Authors:
-
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- National Institutes for Quantum and Radiological Science and Technology, Sayo, Hyogo (Japan)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Chinese Academy of Sciences (CAS), Beijing (China)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
- Kyoto Univ. (Japan)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center for Quantum Matters, Beijing (China)
- Univ. of Tokyo (Japan)
- Indian Institute of Science, Bangalore, Karnataka (India)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Paul Scherrer Institut; Swiss National Science Foundation (SNSF); Japan Society for the Promotion of Science (JSPS); Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- OSTI Identifier:
- 1825727
- Report Number(s):
- BNL-222232-2021-JAAM
Journal ID: ISSN 2399-3650
- Grant/Contract Number:
- SC0012704; CRSII2_141962; CRSII2_160765; 200021L_141325; 290605
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Communications Physics
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2399-3650
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Pelliciari, Jonathan, Ishii, Kenji, Huang, Yaobo, Dantz, Marcus, Lu, Xingye, Olalde-Velasco, Paul, Strocov, Vladimir N., Kasahara, Shigeru, Xing, Lingyi, Wang, Xiancheng, Jin, Changqing, Matsuda, Yuji, Shibauchi, Takasada, Das, Tanmoy, and Schmitt, Thorsten. Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1-xPx)2. United States: N. p., 2019.
Web. doi:10.1038/s42005-019-0236-3.
Pelliciari, Jonathan, Ishii, Kenji, Huang, Yaobo, Dantz, Marcus, Lu, Xingye, Olalde-Velasco, Paul, Strocov, Vladimir N., Kasahara, Shigeru, Xing, Lingyi, Wang, Xiancheng, Jin, Changqing, Matsuda, Yuji, Shibauchi, Takasada, Das, Tanmoy, & Schmitt, Thorsten. Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1-xPx)2. United States. https://doi.org/10.1038/s42005-019-0236-3
Pelliciari, Jonathan, Ishii, Kenji, Huang, Yaobo, Dantz, Marcus, Lu, Xingye, Olalde-Velasco, Paul, Strocov, Vladimir N., Kasahara, Shigeru, Xing, Lingyi, Wang, Xiancheng, Jin, Changqing, Matsuda, Yuji, Shibauchi, Takasada, Das, Tanmoy, and Schmitt, Thorsten. Thu .
"Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1-xPx)2". United States. https://doi.org/10.1038/s42005-019-0236-3. https://www.osti.gov/servlets/purl/1825727.
@article{osti_1825727,
title = {Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe2(As1-xPx)2},
author = {Pelliciari, Jonathan and Ishii, Kenji and Huang, Yaobo and Dantz, Marcus and Lu, Xingye and Olalde-Velasco, Paul and Strocov, Vladimir N. and Kasahara, Shigeru and Xing, Lingyi and Wang, Xiancheng and Jin, Changqing and Matsuda, Yuji and Shibauchi, Takasada and Das, Tanmoy and Schmitt, Thorsten},
abstractNote = {Unconventional superconductivity arises at the border between the strong coupling regime with local magnetic moments and the weak coupling regime with itinerant electrons, and stems from the physics of criticality that dissects the two. Unveiling the nature of the quasiparticles close to quantum criticality is fundamental to understand the phase diagram of quantum materials. Here, using resonant inelastic x-ray scattering (RIXS) and Fe-Kβ emission spectroscopy (XES), we visualize the coexistence and evolution of local magnetic moments and collective spin excitations across the superconducting dome in isovalently-doped BaFe2(As1-xPx)2 (0.00 ≤ x ≤0.52). Collective magnetic excitations resolved by RIXS are gradually hardened, whereas XES reveals a strong suppression of the local magnetic moment upon doping. This relationship is captured by an intermediate coupling theory, explicitly accounting for the partially localized and itinerant nature of the electrons in Fe pnictides. Finally, our work identifies a local-itinerant spin fluctuations channel through which the local moments transfer spin excitations to the particle-hole (paramagnons) continuum across the superconducting dome.},
doi = {10.1038/s42005-019-0236-3},
journal = {Communications Physics},
number = 1,
volume = 2,
place = {United States},
year = {Thu Nov 07 00:00:00 EST 2019},
month = {Thu Nov 07 00:00:00 EST 2019}
}
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