Valence instability across magnetostructural transition in USb$_2$

Z. E. Brubaker; Y. Xiao; P. Chow; C. Kenney-Benson; J. S. Smith; H. Cynn; C. Reynolds; N. P. Butch; R. J. Zieve; J. R. Jeffries

doi:10.1103/PhysRevB.101.085123

Valence instability across magnetostructural transition in USb$_2$

Strongly Correlated Electrons 2020-02-26 v1

Authors: Z. E. Brubaker , Y. Xiao , P. Chow , C. Kenney-Benson , J. S. Smith , H. Cynn , C. Reynolds , N. P. Butch , R. J. Zieve , J. R. Jeffries

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Abstract

We have performed pressure dependent X-ray diffraction and resonant X-ray emission spectroscopy experiments on USb $_2$ to further characterize the AFM-FM transition occurring near 8 GPa. We have found the magnetic transition coincides with a tetragonal to orthorhombic transition resulting in a 17% volume collapse as well as a transient $\textit{f}$ -occupation enhancement. Compared to UAs $_2$ and UAsS, USb $_2$ shows a reduced bulk modulus and transition pressure and an increased volume collapse at the structural transition. Except for an enhancement across the transition region, the $\textit{f}$ -occupancy decreases steadily from 1.96 to 1.75.

Keywords

high-pressure phase transitions

Cite

@article{arxiv.2002.00028,
  title  = {Valence instability across magnetostructural transition in USb$_2$},
  author = {Z. E. Brubaker and Y. Xiao and P. Chow and C. Kenney-Benson and J. S. Smith and H. Cynn and C. Reynolds and N. P. Butch and R. J. Zieve and J. R. Jeffries},
  journal= {arXiv preprint arXiv:2002.00028},
  year   = {2020}
}

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9 pages, 10 figures

Valence instability across magnetostructural transition in USb$_2$

Abstract

Keywords

Cite

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