A superglass is a
phase of matter
In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform. Examples of physical properties include density, index of refraction, magnetizati ...
which is characterized (at the same time) by
superfluid
Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic energy. When stirred, a superfluid forms vortices that continue to rotate indefinitely. Superfluidity occurs in two ...
ity and a frozen
amorphous
In condensed matter physics and materials science, an amorphous solid (or non-crystalline solid, glassy solid) is a solid that lacks the long-range order that is characteristic of a crystal.
Etymology
The term comes from the Greek ''a'' ("wi ...
structure.
J.C. Séamus Davis theorised that frozen
helium-4
Helium-4 () is a stable isotope of the element helium. It is by far the more abundant of the two naturally occurring isotopes of helium, making up about 99.99986% of the helium on Earth. Its nucleus is identical to an alpha particle, and consis ...
(at 0.2 K and 50 Atm) may be a superglass.
Notes
References
Superglass could be new state of matter (subscription required)
A new quantum glass phase: the superglassPhys. Rev. Lett. Vol.101, 8th Aug 2008
Superfluidity
Phases of matter
Glass physics
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