Bruce D. Gaulin

TL;DR: In this article, a pyrochlore antiferromagnet in which the moments reside on a network of corner-sharing tetrahedra was studied. But unlike other geometrically frustrated systems, this system remains paramagnetic down to 0.07 K, rather than ordering into a conventional N\'eel or spin-glass-like state.

TL;DR: In this paper, the Hamiltonian parameters of Yb2Ti2O7 were extracted from high-field inelastic neutron scattering experiments and shown to support a Coulombic ground state in low magnetic fields and host an unusual quantum critical point at larger fields.

TL;DR: In this article, the Hamiltonian parameters of Yb2Ti2O7 were extracted from high-field inelastic neutron scattering experiments and shown to support a Coulombic "Quantum Spin Liquid" ground state in low field and host an unusual quantum critical point at larger fields.

TL;DR: In this article, the authors present results from dc magnetic susceptibility, specific-heat data, inelastic neutron-scattering measurements, and crystal-field calculations that strongly suggest that the ions in the antiferromagnetic pyrochlore lattice of corner-sharing tetrahedra remain in a collective paramagnetic state down to 70 mK.

TL;DR: The fine resolution chopper spectrometer (SEQUOIA) as discussed by the authors was designed to utilize neutrons of an incident energy (Ei) between 10-2000 meV, which is a monochromatic beam provided on a sample, 20 m from the decoupled ambient temperature H2O moderator, by filtering the white beam with a Fermi chopper located 18m from the source, and neutrons are detected by an array of 3He linear position sensitive tubes located on a vertical cylinder with a radius of 5.5 m.