1 results match your criteria: "associé au CNRS et aux Universités PM Curie and D Diderot[Affiliation]"
Giant plasticity of a quantum crystal.
Phys Rev Lett
January 2013
Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, associé au CNRS et aux Universités PM Curie and D Diderot, Paris, France.
Article Synopsis
- When large stresses are applied to crystals at high temperatures, they can deform irreversibly, a process called plasticity caused by moving defects like dislocations.
- Researchers found that helium 4 crystals, under pure conditions and at absolute zero, exhibit a unique form of plasticity that is both reversible and anisotropic (direction-dependent).
- This enhanced plasticity occurs in a specific direction where dislocations move easily, but it gets disrupted in the presence of helium 3 impurities or when dislocations collide with thermal phonons.