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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Rutgers Univ., New Brunswick, NJ (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1418620
Alternate Identifier(s):
OSTI ID: 1333315
Grant/Contract Number:  
SC0005463; DMR-1104884; DMR-1405303; FG02-04ER46105; DMR-1206553
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Kung, H.-H., Ran, S., Kanchanavatee, N., Krapivin, V., Lee, A., Mydosh, J. A., Haule, K., Maple, M. B., and Blumberg, G. Analogy Between the “Hidden Order” and the Orbital Antiferromagnetism in URu2-xFexSi2. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.227601.
Kung, H.-H., Ran, S., Kanchanavatee, N., Krapivin, V., Lee, A., Mydosh, J. A., Haule, K., Maple, M. B., & Blumberg, G. Analogy Between the “Hidden Order” and the Orbital Antiferromagnetism in URu2-xFexSi2. United States. https://doi.org/10.1103/PhysRevLett.117.227601
Kung, H.-H., Ran, S., Kanchanavatee, N., Krapivin, V., Lee, A., Mydosh, J. A., Haule, K., Maple, M. B., and Blumberg, G. Tue . "Analogy Between the “Hidden Order” and the Orbital Antiferromagnetism in URu2-xFexSi2". United States. https://doi.org/10.1103/PhysRevLett.117.227601. https://www.osti.gov/servlets/purl/1418620.
@article{osti_1418620,
title = {Analogy Between the “Hidden Order” and the Orbital Antiferromagnetism in URu2-xFexSi2},
author = {Kung, H.-H. and Ran, S. and Kanchanavatee, N. and Krapivin, V. and Lee, A. and Mydosh, J. A. and Haule, K. and Maple, M. B. and Blumberg, G.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.117.227601},
journal = {Physical Review Letters},
number = 22,
volume = 117,
place = {United States},
year = {Tue Nov 22 00:00:00 EST 2016},
month = {Tue Nov 22 00:00:00 EST 2016}
}

Journal Article:

Citation Metrics:
Cited by: 22 works
Citation information provided by
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Figures / Tables:

FIG. 1. FIG. 1. : (a) The upper panel shows the phase diagram of URu2Si2 system, where the black lines show the phase boundaries. The measurements on the iron substituted URu2−xFexSi2 crystals from neutron diffraction [18] (blue triangle), electrical resistivity [2] (green square), magnetic susceptibility [2] (purple triangle), and heat capacity [3]more » (yellow diamond), are overlaid with the neutron diffraction results for URu2Si2 under hydrostatic pressure [4] (open square) to show the similarity between the two tuning parameters. The lower panel shows the dependence of the $A$2$g$ collective mode energy on the Fe concentration, $x$ [Fig. 2]. At the critical concentration, $x$ = 0.1, the mode maximum is below the accessible energy cutoff. Therefore, the data point is placed at zero energy, with the error bar reflecting the instrumental cutoff. (b)–(g) Schematics of the Ginzburg-Landau free energy in Eq. (1) at various special points in the phase diagram [solid gray circles in (a)]. ψHO and ψAF are the real and imaginary part of the hexadecapole order parameter, respectively [19, 20].« less

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Works referenced in this record:

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Electrodynamics of the antiferromagnetic phase in URu 2 Si 2
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Hybridization gap and anisotropic far-infrared optical conductivity of URu2Si2
text, January 2010


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text, January 2011


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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
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Works referencing / citing this record:

Hidden order and beyond: an experimental—theoretical overview of the multifaceted behavior of URu 2 Si 2
journal, January 2020

  • Mydosh, J. A.; Oppeneer, P. M.; Riseborough, P. S.
  • Journal of Physics: Condensed Matter, Vol. 32, Issue 14
  • DOI: 10.1088/1361-648x/ab5eba

Octupolar order in d-orbital Mott insulators
text, January 2019


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.