Unfolding the physics of URu2Si2 through Si -> P substitution

Abstract

The heavy fermion intermetallic compound URu2Si2 exhibits a "hidden-order" phase below the temperature of 17.5 K, which supports both anomalous metallic behavior and unconventional superconductivity. While these individual phenomena have been investigated in detail, it remains unclear how they are related to each other and to what extent uranium f-electron valence fluctuations influence each one. Here we use ligand site substituted URu2Si2-xPx to establish their evolution under electronic tuning. We find that while hidden order is monotonically suppressed and destroyed for x $\le$ 0.035, the superconducting strength evolves through a dome that is centered near $x$ $\approx$ 0.01 and terminates near $x$ $\approx$ 0.028. This behavior reveals that hidden order depends strongly on tuning outside of the U f-electron shells. It also suggests that while hidden order provides an environment for superconductivity and anomalous metallic behavior, it's fluctuations are not solely responsible for their progression.

14 pages

References in corpus (13)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Nature of the 5f states in actinide metals
• Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2
• Hastatic Order in URu2Si2
• Evidence for broken time-reversal symmetry in the superconducting phase of URu${}_2$Si${}_2$
• Chirality density wave of the 'hidden order' phase in URu${}_2$Si${}_2$
• Evidence for a nematic component to the Hidden Order parameter in URu2Si2 from differential elastoresistance measurements
• Direct observation of lattice symmetry breaking at the hidden-order transition in URu2Si2
• Competing Ordered Phases in URu2Si2: Hydrostatic Pressure and Re-substitution
• Spectroscopic determination of the atomic f-electron symmetry underlying hidden order in URu${}_2$Si${}_2$
• Chemical pressure tuning of URu${}_2$Si${}_2$ via isoelectronic substitution of Ru with Fe
• The suppression of hidden order and onset of ferromagnetism in URu2Si2 via Re substitution
• Hybridization-Driven Orthorhombic Lattice Instability in URu2Si2

Cited by in corpus (10)

• Hidden order and beyond: an experimental-theoretical overview of the multifaceted behavior of URu${}_2$Si${}_2$
• Pressure-Induced Rotational Symmetry Breaking in URu${}_2$Si${}_2$
• Isoelectronic perturbations to $f$-$d$-electron hybridization and the enhancement of hidden order in URu${}_2$Si${}_2$
• Ta4CoSi: a Tantalum-rich superconductor with a honeycomb network structure
• Linear behavior of the optical conductivity and incoherent charge transport in BaCoS2
• NMR Investigation of antiferromagnetism and coherence in URu${}_2$Si${}_{2-x}$P${}_x$
• Origin of gap-like behaviors in URu${}_2$Si${}_2$: Combined study via quasiparticle scattering spectroscopy and resistivity measurements
• Global perspectives of the bulk electronic structure of URu${}_2$Si${}_2$ from angle-resolved photoemission
• The role of band filling in tuning the high field phases of URu2Si2
• Collinear antiferromagnetic order in URu${}_2$Si${}_{2-x}$P${}_x$ revealed by neutron diffraction