# Hidden Orbital Order in U Ru2 Si_2

@article{Chandra2002HiddenOO,
title={Hidden Orbital Order in U Ru2 Si\_2},
author={Premala Chandra and Piers Coleman and J A Mydosh and Vikram Tripathi},
journal={Nature},
year={2002}
}
• Published 1 May 2002
• Physics
• Nature
.S.A .S.A W hen m atter is cooled from high tem peratures, collective instabilities develop am ongst its constituent particles that lead to new kinds of order. 1 A n anom aly in the speci(cid:12)c heat is a classic signature of this phenom enon. U su-ally the associated order is easily identi(cid:12)ed, but som etim es its nature rem ains elusive. T he heavy ferm ion m etal U R u 2 Si 2 is one such exam ple, w here the order responsible for the sharp speci(cid:12)c heat anom aly at T 0 = 17 K…
10 Citations

### Heat capacity of URu2−xOsxSi2 at low temperatures

• Education, Physics
Physical Review B
• 2022
D. L. Kunwar, S. R. Panday, Y. Deng, 3 S. Ran, R. E. Baumbach, M. B. Maple, 3 Carmen C. Almasan, and M. Dzero Department of Physics, Kent State University, Kent, OH 44242, USA Center for Advanced

### Proximity to a critical point driven by electronic entropy in URu2Si2

• Physics
• 2021
The strongly correlated actinide metal URu 2 Si 2 exhibits a mean field-like second order phase transition at T o  ≈ 17 K, yet lacks definitive signatures of a broken symmetry. Meanwhile, various

### Electronic and dynamical properties of CeRh2As2 : Role of Rh2As2 layers and expected orbital order

• Physics
Physical Review B
• 2021
Role of Rh2As2 layers and expected hidden orbital order Andrzej Ptok, ∗ Konrad J. Kapcia, Pawe l T. Jochym, Jan Lażewski, Andrzej M. Oleś, 4 and Przemys law Piekarz 1, † Institute of Nuclear Physics,

### Deep learning on the 2-dimensional Ising model to extract the crossover region with a variational autoencoder

• Computer Science
Scientific Reports
• 2020
The 2-dimensional Ising model on a square lattice is investigated with a variational autoencoder in the non-vanishing field case for the purpose of extracting the crossover region between the

### Critical Theory of Non-Fermi Liquid Fixed Point in Multipolar Kondo Problem

• Physics
• 2020
When the ground state of a localized ion is a non-Kramers doublet, such localized ions may carry multipolar moments. For example, Pr$^{3+}$ ions in a cubic environment would possess quadrupolar and

### Unveiling hidden multipolar orders with magnetostriction

• Physics
Nature Communications
• 2019
It is theoretically proposed that magnetostriction provides a powerful and novel tool to directly detect higher-order multipolar symmetry breaking—such as the elusive octupolar order—by examining scaling behaviour of length change with respect to an applied magnetic field h.

### Gaussian fluctuation corrections to a mean-field theory of complex hidden order in URu2Si2

• Physics
Physical Review B
• 2018
Hidden-order phase transition in the heavy-fermion superconductor URu$_2$Si$_2$ exhibits the mean-field-like anomaly in temperature dependence of heat capacity. Motivated by this observation, here we

### Landau theory of multipolar orders in Pr(Y)2X20 Kondo materials ( Y=Ti , V, Rh, Ir; X=Al , Zn)

• Physics
Physical Review B
• 2018
A series of Pr(TM)$_2$X$_{20}$ (with TM=Ti,V,Rh,Ir and X=Al,Zn) Kondo materials, containing non-Kramers Pr$^{3+}$ $4f^2$ moments on a diamond lattice, have been shown to exhibit intertwined orders

### Quantum criticality

• Physics
Nature
• 2005
It is 100 years on, the same experimental measurement that puzzled Einstein and his contemporaries is forcing us to question the authors' understanding of how quantum matter transforms at ultra-low temperatures.

### Specific heat of URu 2 Si 2 in fields up to 42 T: Clues to the hidden order

• Materials Science, Physics
• 2003
The large $\ensuremath{\Delta}C$ observed at 17.5 K in ${\mathrm{URu}}_{2}{\mathrm{Si}}_{2}$ is inconsistent with the small, $0.04{\ensuremath{\mu}}_{B}$ moment measured for the antiferromagnetism

## References

SHOWING 1-10 OF 33 REFERENCES

### Low-temperature thermodynamics of the two-dimensional orbital antiferromagnet

• Physics
• 1989
We consider the low-temperature properties of a two-dimensional orbital anti-ferromagnet (OAF), which is one of the possible states of the weakly interacting electron system with a half-filled band

### Muon spin relaxation in heavy fermion systems

• Physics
• 1994
Heavy fermion systems have received a great deal of study by a wide variety of techniques, includingμSR. In a number of systems, coexisting superconducting and magnetic states have been reported,

### Hidden Order in $URu_2Si_2$

• Physics
• 1999
We review current attempts to characterize the underlying nature of the hidden order in $URu_2Si_2$. A wide variety of experiments point to the existence of two order parameters: a large primary

### Specific heat anomaly in the d-density wave state and emergence of incommensurate orbital antiferromagnetic order

• Physics
• 2002
We study the effect of finite chemical potential on the d density wave state that has been proposed to explain the pseudogap phenomena in underdoped cuprates. We find that the specific-heat anomaly

### Hidden order in the cuprates

• Physics
• 2001
We propose that the enigmatic pseudogap phase of cuprate superconductors is characterized by a hidden broken symmetry of ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$-type. The transition to this state is

### Specific heat of heavy-fermion URu 2 Si 2 in high magnetic fields

• Physics
• 1997
We have performed specific-heat measurements on the heavy-fermion superconductor URu2Si2 in magnetic fields up to 17.5 T. A sharp peak in the specific heat signals the antiferromagnetic transition at

### Magnetic excitations in the heavy-fermion superconductor URu2Si2.

• BroholmLin
• Physics
Physical review. B, Condensed matter
• 1991
P peaks have not been identified in the magnetic excitation spectra, but instead a continuous spectrum of scattering peaked around the ordering wave vector indicates the presence of overdamped antiferromagnetically correlated spin fluctuations.