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Walker, H. C.; Le, Manh Duc; McEwen, K.A.; Bleckmann, Matthias; Süllow, S.; Mazzoli, Claudio; Wilkins, S. B.; Fort, D.

doi:10.1103/physrevb.84.235142

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…In contrast, quadrupole order can be detected in RXS measurements; in this way the existence of electric quadrupolar ordering was demonstrated for NpO 2 [143], which occurs as an induced order due to the main magnetic triakontadipole order parameter. A similar experiment performed on URu 2 Si 2 by Walker et al [156] demonstrated the absence of any electric quadrupole on the uranium site.…”

Section: Multipolar Ordersmentioning

confidence: 60%

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu₂Si₂

Mydosh

Oppeneer

Riseborough

2020

J. Phys.: Condens. Matter

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This topical review describes the multitude of unconventional behaviors in the hidden order, heavy fermion, antiferromagnetic and superconducting phases of the intermetallic compound URu 2 Si 2 when tuned with pressure, magnetic field, and substitutions for all three elements. Such 'perturbations' result in a variety of new phases beyond the mysterious hidden order that are only now being slowly understood through a series of state-of-the-science experimentation, along with an array of novel theoretical approaches. Despite all these efforts spanning more than 30 years, hidden order (HO) remains puzzling and non-clarified, and the search continues in 2019 into a fourth decade for its final resolution. Here we attempt to update the present situation of URu 2 Si 2 importing the latest experimental results and theoretical proposals. First, let us consider the pristine compound as a function of temperature and report the recent measurements and models relating to its heavy Fermi liquid crossover, its HO and superconductivity (SC). Recent experiments and theories are surmized that address four-fold symmetry breaking (or nematicity), Isingness and unconventional excitation modes. Second, we review the pressure dependence of URu 2 Si 2 and its transformation to antiferromagnetic long-range order. Next we confront the dramatic high magnetic-field phases requiring fields above 40 T. And finally, we attempt to answer how does random substitutions of other 5f elements for U, and 3d, 4d, and 5d elements for Ru, and even P for Si affect and transform the HO. Commensurately, recent theoretical models are summarized and then related to the intriguing experimental behavior.

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Section: Multipolar Ordersmentioning

confidence: 60%

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu₂Si₂

Mydosh

Oppeneer

Riseborough

2020

J. Phys.: Condens. Matter

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“…Walker et al . were also scanning the uranium M 4 ‐edge of U(Pd 1‐ x Pt x ) 3 ( x = 0.005, 0.01) . For x = 0 there are four different phase transitions below 8 K, the lowest two influenced by an ordering of the uranium 5 f electrons, accompanying an in‐phase stacking Q xy and causing super‐lattice reflections.…”

Section: History and Present Statusmentioning

confidence: 99%

Probing a crystal's short‐range structure and local orbitals by Resonant X‐ray Diffraction methods

Zschornak

Richter

Nentwich

et al. 2014

Crystal Research and Technology

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Diffraction Anomalous Fine Structure (DAFS) combines the long‐range, crystallographic sensitivity of X‐ray diffraction with the short‐range sensitivity of X‐ray Absorption Spectroscopy (XAS). In comparison to other spectroscopic methods, DAFS can additionally distinguish phases of different translational symmetry by choice of momentum transfer, or isolate spectra from chemically identical atoms on various Wyckoff sites of a crystal's structure using crystallographic weights. The Anisotropy of Anomalous Scattering (AAS) extends the concept of isotropically scattering atoms to a more general case, where the atom's scattering characteristics depend on the polarization as well as the wavevector of the incident and scattered X‐rays. These can be written as tensors that reflect the local site symmetries of the resonant atom. Forbidden Reflection Near‐Edge Diffraction (FRED) is an elegant way to measure AAS by using reflections that are extinguished in the special case of isotropically scattering atoms. They can only be observed due to the non‐isotropic contributions at photon energies in the vicinity of an absorption edge where electronic transitions occur. Combining the site selectivity of DAFS with the information accessible through AAS allows probing the short‐range order and local orbitals of selected atoms in a crystal structure of a chosen phase. The present condensed review gives a brief overview on the pioneer work, the theory and sensitivities as well as selected recent applications of these powerful and promising Resonant X‐ray Diffraction (RXD) methods. Additionally, some recent work of the authors is included exemplarily for the model structure rutile TiO2 presenting the progress in measurement and interpretation.

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Synchrotron radiation techniques and their application to actinide materials

2023

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5fdelocalization-induced suppression of quadrupolar order in U(Pd1−xPtx)

Cited by 7 publications

References 24 publications

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu₂Si₂

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu₂Si₂

Probing a crystal's short‐range structure and local orbitals by Resonant X‐ray Diffraction methods

Synchrotron radiation techniques and their application to actinide materials

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5fdelocalization-induced suppression of quadrupolar order in U(Pd1−xPtx)

Cited by 7 publications

References 24 publications

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu2Si2

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu2Si2

Probing a crystal's short‐range structure and local orbitals by Resonant X‐ray Diffraction methods

Synchrotron radiation techniques and their application to actinide materials

Contact Info

Product

Resources

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Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu₂Si₂

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu₂Si₂