  As an empirical tool in materials science and engineering, the iconic phase
diagram owes its robustness and practicality to the topological characteristics
rooted in the celebrated Gibbs phase law (F = C - P + 2). When crossing the
phase diagram boundary, the structure transition occurs abruptly, bringing
about an instantaneous change in physical properties and limited
controllability on the boundaries (F = 1). Here, we expand the sharp phase
boundary to an amorphous transition region (F = 2) by partially disrupting the
long-range translational symmetry, leading to a sequential
crystalline-amorphous-crystalline (CAC) transition in a pressurized In2Te5
single crystal. Through detailed in-situ synchrotron diffraction, we elucidate
that the phase transition stems from the rotation of immobile blocks
[In2Te2]2+, linked by hinge-like [Te3]2- trimers. Remarkably, within the
amorphous region, the amorphous phase demonstrates a notable 25 % increase of
the superconducting transition temperature (Tc), while the carrier
concentration remains relatively constant. Furthermore, we propose a
theoretical framework revealing that the unconventional boost in amorphous
superconductivity might be attributed to an intensified electron correlation,
triggered by a disorder-augmented multifractal behavior. These findings
underscore the potential of disorder and prompt further exploration of
unforeseen phenomena on the phase boundaries.
