Correlation between ground state and orbital anisotropy in heavy fermion materials.
T. Willers,F. Strigari,Zhiwei Hu,Violetta Sessi,Nicholas B. Brookes,Eric D. Bauer,John L. Sarrao,J. D. Thompson,Arata Tanaka,Steffen Wirth,Liu Hao Tjeng,A. Severing +11 more
TLDR
Evidence is presented for a correlation between orbital anisotropy and the ground states in a representative family of materials, Cerium-based heavy fermion compounds, which covers long-range antiferromagnetic order, unconventional superconductivity, and coexistence of these two states.Abstract:
The interplay of structural, orbital, charge, and spin degrees of freedom is at the heart of many emergent phenomena, including superconductivity. Unraveling the underlying forces of such novel phases is a great challenge because it not only requires understanding each of these degrees of freedom, it also involves accounting for the interplay between them. Cerium-based heavy fermion compounds are an ideal playground for investigating these interdependencies, and we present evidence for a correlation between orbital anisotropy and the ground states in a representative family of materials. We have measured the 4f crystal-electric field ground-state wave functions of the strongly correlated materials CeRh1−xIrxIn5 with great accuracy using linear polarization-dependent soft X-ray absorption spectroscopy. These measurements show that these wave functions correlate with the ground-state properties of the substitution series, which covers long-range antiferromagnetic order, unconventional superconductivity, and coexistence of these two states.read more
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Solids, liquids, and gases under high pressure
TL;DR: The effect of adding high pressure as a control parameter in solids, liquids, and gases expands opportunities to observe unexpected novel phenomena and understand matter in extreme environments as mentioned in this paper, and a review on high pressure science highlights subjects ranging from quantum criticality to Earth science.
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Visualizing heavy fermions emerging in a quantum critical Kondo lattice
TL;DR: In this paper, the authors used spectroscopic mapping with the scanning tunnelling microscope to detect the emergence of heavy excitations with lowering of temperature in a prototypical family of cerium-based heavy-fermion compounds.
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Modeling the Localized to Itinerant Electronic Transition in the Heavy Fermion System CeIrIn5
TL;DR: In this article, the authors address the fundamental question of crossover from the localized to the itinerant state of a paradigmatic heavy fermion material: CeIrIn5, and they find multiple hybridization gaps and link them to the crystal structure of the material.
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Recent Advances in Ce-Based Heavy-Fermion Superconductivity and Fermi Surface Properties( Frontiers of Novel Superconductivity in Heavy Fermion Compounds)
TL;DR: In this article, the recent advances in Ce-based heavy fermion superconductivity were presented, where the competition between the Ruderman-Kittel-Kasuya-Yosida interaction and the Kondo effect was considered.
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Foundations of heavy-fermion superconductivity: lattice Kondo effect and Mott physics
Frank Steglich,Steffen Wirth +1 more
TL;DR: This article overviews the development of heavy-fermion superconductivity, notably in such rare-earth-based intermetallic compounds which behave as Kondo-lattice systems, and concludes for YbRh2Si2, the breakdown of the Kondo effect concurring with the AF instability gives rise to an abrupt change of the Fermi surface.
References
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Handbook on the physics and chemistry of rare earths. Volume 9
K.A. Gschneider,L. Eyring +1 more
TL;DR: In this article, it has been said that rare earth elements are destined to play an even greater role in our ''high-tech'' society in the future than they have in the past, based upon the trend of increasing applications resulting from the electronic structures of these materials that lead to their unusual optical, magnetic, electrical and chemical properties so adaptable to the demands now being placed on materials.
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Quantum criticality in heavy-fermion metals
TL;DR: In this paper, the authors summarize some of the basic issues, including the extent to which the quantum criticality in heavy-fermion metals goes beyond the standard theory of order-parameter fluctuations, the nature of the Kondo effect in the quantum-critical regime, the non-Fermi-liquid phenomena that accompany quantum criticalities and the interplay between quantum criticalness and unconventional superconductivity.
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Pressure-induced superconductivity in quasi-2D CeRhIn5
H. Hegger,Cedomir Petrovic,E. G. Moshopoulou,M. F. Hundley,J. L. Sarrao,Zachary Fisk,Joe D. Thompson +6 more
TL;DR: CeRhIn5 is a new heavy-electron material that crystallizes in a quasi-2D structure that can be viewed as alternating layers of CeIn3 and RhIn2 stacked sequentially along the tetragonal c axis that induces a first-order-like transition from an unconventional antiferromagnetic state to a superconducting state.
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Heavy-fermion superconductivity in CeCoIn5 at 2.3 K
Cedomir Petrovic,P. G. Pagliuso,M. F. Hundley,Roman Movshovich,J. L. Sarrao,Joe D. Thompson,Z. Fisk,Z. Fisk,p. Monthoux +8 more
TL;DR: In this article, the authors reported the observation of heavy-fermion superconductivity in CeCoIn5 at Tc = 2.3 K. When compared to the pressure-induced Tc of its cubic relative CeIn3 (Tc~200 mK), the Tc
Journal ArticleDOI
Heavy-fermion superconductivity in CeCoIn5 at 2.3K
Cedomir Petrovic,P. G. Pagliuso,M. F. Hundley,Roman Movshovich,J. L. Sarrao,J. D. Thompson,Z. Fisk,p. Monthoux +7 more
TL;DR: In this article, the authors reported the observation of heavy-fermion superconducitivity in CeCoIn5 at Tc = 2.3 K. When compared to the pressure-induced Tc of its cubic relative CeIn3 (Tc ~200 mK), the Tc