Journal ArticleDOI
Dynamic spin ice: Pr2Sn2O7.
H. D. Zhou,Christopher R. Wiebe,J. A. Janik,Luis Balicas,Y. J. Yo,Yiming Qiu,Yiming Qiu,John R. D. Copley,J. S. Gardner,J. S. Gardner +9 more
TLDR
A new spin ice is reported--Pr2Sn2O7--which appears to have enhanced residual entropy due to the dynamic nature of the spins, and suggests that the ground state is dynamic.Abstract:
In this Letter, we report a new spin ice--Pr2Sn2O7--which appears to have enhanced residual entropy due to the dynamic nature of the spins. Neutron scattering experiments show that at 200 mK, there is a significant amount of magnetic diffuse scattering which can be fit to the dipolar spin-ice model. However, these short-ranged ordered spins have a quasielastic response that is atypical of the canonical spin ices, and suggests that the ground state is dynamic (i.e., composed of locally ordered two-in-two-out spin configurations that can tunnel between energetically equivalent orientations). We report this as an example of a dynamic spin ice down to 200 mK.read more
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Journal ArticleDOI
Quantum spin ice: a search for gapless quantum spin liquids in pyrochlore magnets
TL;DR: The latest developments in the study of a quantum spin liquid are described, focusing on the spin liquid phenomenology and the kinds of materials where such a phase might be found.
Journal ArticleDOI
Seeing the light: Experimental signatures of emergent electromagnetism in a quantum spin ice
TL;DR: In this article, a lattice field theory was developed for quantum spin-ice materials, and it was used to make explicit predictions for the dynamical structure factor that would be observed in neutron scattering experiments on a quantum spin ice.
Journal ArticleDOI
Quantum fluctuations in spin-ice-like Pr2Zr2O7
Koutarou D. Kimura,Satoru Nakatsuji,Satoru Nakatsuji,Jiajia Wen,Collin Broholm,Collin Broholm,Collin Broholm,Matthew B. Stone,Eiji Nishibori,Hiroshi Sawa +9 more
TL;DR: Experimental evidence for quantum dynamics of magnetic monopolar quasiparticles in a new class of spin ice based on exchange interactions, Pr2Zr2O7, finds narrow pinch point features in otherwise diffuse elastic neutron scattering reflects adherence to a divergence-free constraint for disordered spins on long time scales.
Journal ArticleDOI
Higgs transition from a magnetic Coulomb liquid to a ferromagnet in Yb2Ti2O7
Lieh-Jeng Chang,Lieh-Jeng Chang,Shigeki Onoda,Yixi Su,Ying-Jer Kao,Ku Ding Tsuei,Yukio Yasui,Yukio Yasui,Kazuhisa Kakurai,Martin R. Lees +9 more
TL;DR: Evidence of a Higgs transition from a magnetic Coulomb liquid to a ferromagnet in single-crystal Yb2Ti2O7 is reported, which is explained on the basis of a quantum spin-ice model, whose high-temperature phase is effectively described as a magnetism liquid, whereas the ground state shows a nearly collinear ferromaggnetism with gapped spin excitations.
Posted Content
Spin Ice
TL;DR: In this article, the essential ingredients of spin ice phenomenology in magnetic pyrochlore oxides have been reviewed, where Ising-like magnetic rare earth moments sit on a lattice of corner-shared tetrahedra and are coupled via effectively ferromagnetic (dipolar) interactions.