Amorphous and crystalline forms of silicon are well-known, tetrahedrally coordinated
semiconductors. High-pressure studies have revealed extensive polymorphism among …

Structurally disordered materials pose fundamental questions,,–, including how different
disordered phases ('polyamorphs') can coexist and transform from one phase to another …

Amorphous silicon is a semiconductor with a lower density than the metallic silicon liquid. It
is widely believed that the amorphous–liquid transition is a first-order melting transition. In …

Polyamorphic transformations of silicon have been investigated by constant-pressure first-
principles molecular-dynamics simulations. By pressurizing a normal amorphous Si with …

Silicon in its liquid and amorphous forms occupies a unique position among amorphous
materials. Obviously important in its own right, the amorphous form is structurally close to the …

Some low-coordination materials, including water, silica, and silicon, exhibit polyamorphism,
having multiple amorphous forms. However, the microscopic mechanism and kinetic …

Crystalline and amorphous forms of silicon are the principal materials used for solid-state
electronics and photovoltaics technologies. Silicon is therefore a well-studied material …

It is shown that the crystal lattice expansion of microcrystalline silicon leads, in the limit of
small crystallite size of about 30 Å, to an instability of the diamond structure with respect to …

A low-to high-density pressure-driven phase transition in amorphous silicon is investigated
by synchrotron x-ray diffraction in the diamond anvil cell. Complementary atomistic …

Silicon and Germanium crystal structure changes at high pressures from the
semiconducting diamond-type Page 1 in a state veryclose to the native one. Blood samples …