Low frequency spin dynamics in XY quantum spin ice Yb$_2$Pt$_2$O$_7$

S. K. Takahashi; A. Arsenault; C. Mauws; A. M. Hallas; C. Sarkis; K. A. Ross; C. R. Wiebe; M. Tachibana; G. M. Luke; T. Imai

doi:10.1103/PhysRevB.98.104425

Low frequency spin dynamics in XY quantum spin ice Yb$_2$Pt$_2$O$_7$

Strongly Correlated Electrons 2018-10-03 v2

Authors: S. K. Takahashi , A. Arsenault , C. Mauws , A. M. Hallas , C. Sarkis , K. A. Ross , C. R. Wiebe , M. Tachibana , G. M. Luke , T. Imai

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Abstract

The XY pyrochlore Yb $_2$ Ti $_2$ O $_7$ , with pseudo spin 1/2 at the Yb $^{3+}$ site, has been celebrated as potential host for the quantum spin ice state. The substitution of non-magnetic Ti with Pt gives Yb $_2$ Pt $_2$ O $_7$ , a system with remarkably similar magnetic properties. The large nuclear gyromagnetic ratio ( $\gamma_{n}/2 \pi = 9.15$ ~MHz/T) of $^{195}$ Pt makes Yb $_2$ Pt $_2$ O $_7$ an ideal material for NMR investigation of its unconventional magnetic properties. Based on the $^{195}$ Pt nuclear spin-lattice relaxation rate $1/T_1$ and the magnetic specific heat $C_{p}$ measured in a broad range of magnetic field $B_{ext}$ , we demonstrate that the field-induced magnon gap linearly decreases with $B_{ext}$ but additional low energy mode of spin excitations emerge below $\sim 0.5$ ~T.

Keywords

magnetic materials and spin systems frustrated magnetism spin excitations in condensed matter

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@article{arxiv.1801.02724,
  title  = {Low frequency spin dynamics in XY quantum spin ice Yb$_2$Pt$_2$O$_7$},
  author = {S. K. Takahashi and A. Arsenault and C. Mauws and A. M. Hallas and C. Sarkis and K. A. Ross and C. R. Wiebe and M. Tachibana and G. M. Luke and T. Imai},
  journal= {arXiv preprint arXiv:1801.02724},
  year   = {2018}
}

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Low frequency spin dynamics in XY quantum spin ice Yb$_2$Pt$_2$O$_7$

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