Quantum crystals abound in the whole range of solid-state species. Below a certain
threshold temperature the physical behavior of rare gases (He 4 and Ne), molecular solids …

This review addresses experiments on elasticity, plasticity, and flow of solid He 4 and He 3,
focusing on dislocations and other defects that are responsible for the unusual mechanical …

Solid helium is paradoxical: it is both a model and an exception. It is a model for crystal
properties mainly because of its extreme purity which makes universal phenomena simpler …

Solid He 4 is a unique example of crystal where dislocations may move at macroscopic
speeds with impurities attached to them. In He 4 crystals, the only impurities are He 3 atoms …

A review is given of recent NMR experiments at ultra-low temperatures that explore
properties of quantum fluids and solids in regimes where unusual dynamics characterizes …

Measurements of the 3 He nuclear spin relaxation times of dilute 3 He impurities in solid 4
He have been used to explore the unusual dynamics of solid 4He at low temperatures. The …

We present a new simplified derivation of the effect of lattice relaxation that accompanies the
quantum tunneling of 3 He impurities in solid 4 He on the nuclear spin-lattice relaxation of …

We discuss the analysis of the experimental values of the nuclear spin–lattice and spin–spin
relaxation times for the tunneling of^ 3 3 He as isotopic impurities in solid^ 4 4 He. These …

We report heat capacity measurements of solid He 4 and He 3-He 4 solid mixture samples
grown in silica aerogel. In addition to the Debye T 3 term, the heat capacity of solid He 4 …

We present a new simplified derivation of the effect of lattice relaxation that accompanies the
quantum tunneling of 3He impurities in solid 4He on the nuclear spin-lattice relaxation of the …