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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:C17022 - International Workshop on Quantum Spin IcePODCAST Subscribe to podcast

International Workshop on Quantum Spin Ice

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Collection URL: http://pirsa.org/C17022


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PIRSA:17060031  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Microscopic aspects of insulating rare-earth pyrochlore magnets
Speaker(s): Jeffrey Rau
Abstract: In this tutorial, we will review the microscopic aspects of rare-earth magnets relevant for quantum spin ice. We first discuss the single-ion properties of the variety of rare-earth atoms that appear in quantum spin ice candidate materials. Second, we consider the origin of the two-ion exchange inte... read more
Date: 07/06/2017 - 9:00 am

PIRSA:17060032  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Lightning review on emergent quantum electrodynamics in quantum spin ice
Speaker(s): Yong-Baek Kim
Abstract: We aim to provide a concise review on theoretical background on emergent quantum electrodynamics in pyrochlore quantum spin ice. We first introduce elementary excitations in quantum spin ice using a simple model and then extend the discussion to more realistic systems. Implications to experiments ar... read more
Date: 07/06/2017 - 10:30 am

PIRSA:17060033  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The importance of defects and structural flexibility in the physics of quantum spin ices
Speaker(s): Tyrel McQueen
Abstract: Harboring interpenetrating lattices of corner-sharing tetrahedra, materials with the pyrochlore structure type dominate exploration of the physics of quantum spin ices. Recent synthetic advances in the control of point defects, such as in Yb2Ti2O7 and Pr2Zr2O, have demonstrated that even sub-percent... read more
Date: 07/06/2017 - 11:15 am

PIRSA:17060034  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quasiparticle breakdown in the quantum pyrochlore Yb2Ti2O7 in magnetic field
Speaker(s): Radu Coldea
Abstract: The pyrochlore magnet Yb2Ti2O7 has the remarkable property that it orders magnetically, but has no propagating magnons over wide regions of reciprocal space. Using inelastic neutron scattering we observe that at high magnetic fields, in addition to dispersive magnons there is also a two-magnon conti... read more
Date: 07/06/2017 - 2:00 pm

PIRSA:17060035  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Lobed phase diagram of single crystalline Yb2Ti2O7 in [111] magnetic field
Speaker(s): Collin Broholm
Abstract: High quality single crystals of Yb2Ti2O7 synthesized using a traveling solvent floating zone method enable experiments that explore the anisotropic temperature-field phase diagram of this quantum spin ice candidate. We have examined the H//(111) orientation, which is interesting because a phase tran... read more
Date: 07/06/2017 - 2:25 pm

PIRSA:17060036  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Experimental signatures of phase competition in quantum XY pyrochlores
Speaker(s): Alannah Hallas
Abstract: The erbium and ytterbium rare earth pyrochlores exhibit local XY spin anisotropy. Experimental and theoretical investigations of XY pyrochlores have revealed a strong propensity for quantum magnetic phenomena, such as order-by-disorder and the quantum spin ice state. We have conducted a systematic i... read more
Date: 07/06/2017 - 2:50 pm

PIRSA:17060037  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Low temperature specific heat characterization of the geometrically frustrated magnetic compound Yb2Ti2O7
Speaker(s): David Pomaranski
Abstract: Yb2Ti2O7 is a geometrically frustrated magnet that proposed as a quantum spin liquid (QSL) candidate. This would have an emergent U(1) gauge structure, support emergent quasiparticles and a continuum of gapless spin excitations. A cubic power law dependence is expected in the specific heat down to z... read more
Date: 07/06/2017 - 4:00 pm

PIRSA:17060039  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Living on the edge: multiphase competition in Yb2Ti2O7 and monopole crystal in Tb2Ti2O7
Speaker(s): Ludovic Jaubert
Abstract: Yb2Ti2O7 and Tb2Ti2O7 share the common point to sit at the edge between different phases. This multiphase competition makes the characterization of their low-temperature physics a challenge and, more generally, brings another degree of complexity to rare-earth pyrochlores. In this talk, we will take... read more
Date: 08/06/2017 - 9:00 am

PIRSA:17060040  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum spin ice under a [111] magnetic field: from pyrochlore to kagome
Speaker(s): Shigeki Onoda
Abstract: Quantum spin ice, modeled for magnetic rare-earth pyrochlores, has attracted great interest for hosting a U(1) quantum spin liquid, which involves spin-ice monopoles as gapped deconfined spinons, as well as gapless excitations analogous to photons. However, the global phase diagram under a [111] mag... read more
Date: 08/06/2017 - 9:25 am

PIRSA:17060041  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Recent measurements of dipolar-octupolar rare earth pyrochlores
Speaker(s): Bella Lake
Abstract: This talk will outline recent measurements on the dipolar-octupolar rare earth pyrochlores Nd2Zr2O7 and Nd2Hf2O7. Measurements of their crystal field excitations allows the wavefunction of their ground state Kramer’s doublet to be determined. Both compounds develop long-range magnetic order and th... read more
Date: 08/06/2017 - 10:30 am

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