Complex materials are composed of basic units which invariably interact with anharmonic
potentials. It is well known that the dynamics of systems with anharmonic interaction are …

A unified picture of different application areas for incipient metals is presented. This
unconventional material class includes several main‐group chalcogenides, such as GeTe …

The reversible phase transitions in phase-change memory devices can switch on the order
of nanoseconds, suggesting a close structural resemblance between the amorphous and …

The global demand for data storage and processing is increasing exponentially. To deal
with this challenge, massive efforts have been devoted to the development of advanced …

The phase change compound Ge2Sb2Te5 (GST225) is exploited in advanced non-volatile
electronic memories and in neuromorphic devices which both rely on a fast and reversible …

The paradigmatic view on the transformation of a supercooled liquid into a glass, so‐called
vitrification or glass transition, and the subsequent time evolution of the non‐equilibrium …

Abstract In glasses, secondary (β-) relaxations are the predominant source of atomic
dynamics. Recently, they have been discovered in covalently bonded glasses, ie …

Unlike a crystal, a glassy solid state displays slow internal relaxation processes besides
vibrational modes even when structural (α) relaxation is frozen. The precise nature of such …

While polymorphism is prevalent in crystalline solids, polyamorphism draws increasing
interest in various types of amorphous solids. Recent studies suggested that supercooling of …

The secondary (β) relaxation is an intrinsic feature of glassy systems and is crucial for the
mechanical properties of metallic glasses. However, it remains puzzling what structural …