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Title: Analogy Between the “Hidden Order” and the Orbital Antiferromagnetism in URu 2 - x Fe x Si 2

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [1];  [1];  [3];  [1];  [2];  [4]
  1. Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics & Astronomy
  2. Univ. of California, San Diego, CA (United States). Dept. of Physics; Univ. of California, San Diego, CA (United States). Center for Advanced Nanoscience
  3. Leiden Univ. (Netherlands). Kamerlingh Onnes Lab.
  4. Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics & Astronomy; National Inst. of Chemical Physics and Biophysics,Tallinn (Estonia)

We study URu2-xFexSi2, in which two types of staggered phases compete at low temperature as the iron concentration x is varied: the nonmagnetic \hidden order" (HO) phase below the critical concentration xc, and unconventional antiferromagnetic (AF) phase above xc. By using polarization resolved Raman spectroscopy, we detect a collective mode of pseudovector-like A2g symmetry whose energy continuously evolves with increasing x; it monotonically decreases in the HO phase until it vanishes at x = xc, and then reappears with increasing energy in the AF phase. The mode's evolution provides direct evidence for unified order parameter for both nonmagnetic and magnetic phases arising from the orbital degrees-of-freedom of the uranium-5f electrons.

Research Organization:
Rutgers Univ., New Brunswick, NJ (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0005463; DMR-1104884; DMR-1405303; FG02-04ER46105; DMR-1206553
OSTI ID:
1418620
Alternate ID(s):
OSTI ID: 1333315
Journal Information:
Physical Review Letters, Vol. 117, Issue 22; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Field Reentrance of the Hidden Order State of URu2Si2 under Pressure text January 2009
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Visualizing the Formation of the Kondo Lattice and the Hidden Order in URu2Si2 text January 2010
Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2 text January 2010
Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2 text January 2010
Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2 text January 2011
Role of commensurate and incommensurate low-energy excitations in the paramagnetic to hidden-order transition of URu$_2$Si$_2$ text January 2011
Evidence for a nematic component to the Hidden Order parameter in URu2Si2 from differential elastoresistance measurements text January 2014
Chirality density wave of the 'hidden order' phase in URu$_2$Si$_2$ text January 2014
Electrodynamics of the antiferromagnetic phase in URu$_2$Si$_2$ text January 2015
Optical conductivity of URu$_2$Si$_2$ in the Kondo Liquid and Hidden-Order Phases text January 2015
Pressure dependence of the magnetization of URu2Si2 text January 2006

Cited By (2)

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu 2 Si 2 journal January 2020
Octupolar order in d-orbital Mott insulators text January 2019

Figures / Tables (4)


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