title: Unfolding the physics of URu2Si2 through silicon to phosphorus 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 URu2Si(2-x)P(x) to establish their evolution under electronic tuning. We find that while hidden order is monotonically suppressed and destroyed for x≤0.035, the superconducting strength evolves non-monotonically with a maximum near x≈0.01 and that superconductivity is destroyed near x≈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 may not be solely responsible for their progression.
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: A
authors.initials: A
authors.lastname: Gallagher
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: K-W
authors.initials: KW
authors.lastname: Chen
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Moir
authors.affiliation: Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
authors.forename: S K
authors.initials: SK
authors.lastname: Cary
authors.affiliation: Applied Superconductivity Center, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: F
authors.initials: F
authors.lastname: Kametani
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.|National Institute for Materials Science 3-13 Sakura, Tsukuba 305-0003, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kikugawa
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: D
authors.initials: D
authors.lastname: Graf
authors.affiliation: Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
authors.forename: T E
authors.initials: TE
authors.lastname: Albrecht-Schmitt
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Riggs
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: A
authors.identifier: http://orcid.org/0000-0003-1550-3690
authors.initials: A
authors.lastname: Shekhter
authors.affiliation: National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Baumbach