期刊
SCIENCE ADVANCES
卷 2, 期 10, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1601086
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences
- Gordon and Betty Moore Foundation as part of EPiQS (Emergent Phenomena in Quantum Systems) Initiative [GBMF4530]
- NSF-MRSEC program through Princeton Center for Complex Materials [DMR-1420541]
- Linda and Eric Schmidt Transformative Fund
- W.M. Keck Foundation
- P.A.'s start-up funds
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
- Canada Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Saskatchewan
- Government of Saskatchewan
- Western Economic Diversification Canada
- National Research Council Canada
- Canadian Institutes of Health Research
- Max Planck-University of British Columbia Centre for Quantum Materials
- Killam Fellowship
- Alfred P. Sloan Fellowship
- NSERC's Steacie Memorial Fellowship
- Alexander von Humboldt Fellowship
- Canada Research Chairs Program
- NSERC
- Canadian Institute for Advanced Research's (CIFAR's) Quantum Materials program
- CIFAR Global Academy
- [NSF-DMR1104612]
Resonant x-ray scattering (RXS) has recently become an increasingly important tool for the study of ordering phenomena in correlated electron systems. Yet, the interpretation of RXS experiments remains theoretically challenging because of the complexity of the RXS cross section. Central to this debate is the recent proposal that impurity-induced Friedel oscillations, akin to quasi-particle interference signals observed with a scanning tunneling microscope (STM), can lead to scattering peaks in RXS experiments. The possibility that quasi-particle properties can be probed in RXS measurements opens up a new avenue to study the bulk band structure of materials with the orbital and element selectivity provided by RXS. We test these ideas by combining RXS and STM measurements of the heavy fermion compound CeMIn5 (M = Co, Rh). Temperature-and doping-dependent RXS measurements at the Ce-M-4 edge show abroad scattering enhancement that correlates with the appearance of heavy f-electron bands in these compounds. The scattering enhancement is consistent with the measured quasi-particle interference signal in the STM measurements, indicating that the quasi-particle interference can be probed through the momentum distribution of RXS signals. Overall, our experiments demonstrate new opportunities for studies of correlated electronic systems using the RXS technique.
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