Order-Disorder Transitions in (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$

Puspa Upreti; Matthew Krogstad; Charlotte Haley; Mihai Anitescu; Vishwas Rao; Lekh Poudel; Omar Chmaissem; Stephan Rosenkranz; Raymond Osborn

doi:10.1103/PhysRevLett.128.095701

paper

Order-Disorder Transitions in (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$

arXiv:2205.02305 · doi:10.1103/PhysRevLett.128.095701

Abstract

The classification of structural phase transitions as displacive or order-disorder in character is usually based on spectroscopic data above the transition. We use single crystal x-ray diffraction to investigate structural correlations in the quasi-skutterudites, (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$ , which have a quantum phase transition at $x \sim 0.9$ . Three-dimensional pair distribution functions show that the amplitudes of local atomic displacements are temperature-independent below the transition and persist to well above the transition, a signature of order-disorder behavior. The implications for the associated electronic transitions are discussed.

arXiv comment5 pages, 4 figures

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Order-Disorder Transitions in (Cax​Sr1−x​)3​Rh4​Sn13​

Abstract

References in corpus (11)

Cited by in corpus (8)

Order-Disorder Transitions in (Ca $_{x}$ Sr $_{1 - x}$ ) $_{3}$ Rh $_{4}$ Sn $_{13}$