Abstract
We report on comprehensive results identifying the ground state of a triangular-lattice structured as a spin glass, including no long-range magnetic order, prominent broad excitation continua, and the absence of magnetic thermal conductivity. More crucially, from the ultralow-temperature ac susceptibility measurements, we unambiguously observe frequency-dependent peaks around 0.1 K, indicating the spin-glass ground state. We suggest this conclusion holds also for its sister compound , which is confirmed by the observation of spin freezing at low temperatures. We consider disorder and frustration to be the main driving force for the spin-glass phase.
- Received 30 November 2017
- Revised 12 January 2018
DOI:https://doi.org/10.1103/PhysRevLett.120.087201
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