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- W3045464144 abstract "We address two long-standing questions regarding the hidden order in ${mathrm{URu}}_{2}{mathrm{Si}}_{2}$: Is it associated with the hybridization process, and what are the distinct roles played by the localized and itinerant electrons? Our quasiparticle scattering spectroscopy reveals a hybridization gap ubiquitous in the entire phase space spanned by P and Fe substitutions in ${mathrm{URu}}_{2}{mathrm{Si}}_{2}$, including the no-order and antiferromagnetic regions, with minimal change upon crossing the phase boundary. This indicates its opening is not associated with the ordering, and thus localized electrons must be the major player. Towards a consistent understanding of all the other gaplike behaviors observed only below transition temperatures, we analyze the electrical resistivity using a model in which gapped bosonic excitations are the dominant scattering source. With their stiffness set to follow an unusual temperature dependence (decreasing with decreasing temperature), this model fits all of our resistivity data well including the jump at the transition. Remarkably, the extracted gap increases slowly with increasing Fe content, similarly to the gap detected by inelastic neutron scattering at ${Q}_{1}=(1.4,0,0)$, suggesting a common origin. Such a model can also naturally explain the Hall effect temperature dependence without invoking Fermi surface gapping." @default.
- W3045464144 created "2020-07-29" @default.
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- W3045464144 date "2020-08-03" @default.
- W3045464144 modified "2023-10-17" @default.
- W3045464144 title "Origin of gaplike behaviors in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>URu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Si</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> : Combined study via quasiparticle scattering spectroscopy and resistivity measurements" @default.
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- W3045464144 doi "https://doi.org/10.1103/physrevb.102.081101" @default.
- W3045464144 hasPublicationYear "2020" @default.
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