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Title: Distinct magnetic spectra in the hidden order and antiferromagnetic phases in URu 2 - x Fe x Si 2

Journal Article · · Physical Review B
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [1];  [4];  [4]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  2. Univ. of California, San Diego, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

We use neutron scattering to compare the magnetic excitations in the hidden order (HO) and antiferromagnetic (AFM) phases in URu2–xFexSi2 as a function of Fe concentration. The magnetic excitation spectra change significantly between x=0.05 and x=0.10, following the enhancement of the AFM ordered moment, in good analogy to the behavior of the parent compound under applied pressure. Prominent lattice-commensurate low-energy excitations characteristic of the HO phase vanish in the AFM phase. The magnetic scattering is dominated by strong excitations along the Brillouin zone edges, underscoring the important role of electron hybridization to both HO and AFM phases and the similarity of the underlying electronic structure. As a result, the stability of the AFM phase is correlated with enhanced local-itinerant electron hybridization.

Research Organization:
Univ. of California, San Diego, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-04ER46105; DMR1206553; AC52-07NA27344
OSTI ID:
1418497
Alternate ID(s):
OSTI ID: 1331032; OSTI ID: 1420287
Report Number(s):
LLNL-JRNL-736530; PRBMDO; TRN: US1801283
Journal Information:
Physical Review B, Vol. 94, Issue 20; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Optical conductivity of URu$_2$Si$_2$ in the Kondo Liquid and Hidden-Order Phases text January 2015

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