Editing State of matter (section)

==Other proposed states==

===Supersolid===
{{Main|Supersolid}}

A supersolid is a spatially ordered material (that is, a solid or crystal) with superfluid properties. Similar to a superfluid, a supersolid is able to move without friction but retains a rigid shape. Although a supersolid is a solid, it exhibits so many characteristic properties different from other solids that many argue it is another state of matter.<ref>
{{cite journal
 |author=G. Murthy
 |display-authors=etal
 |date=1997
 |title=Superfluids and Supersolids on Frustrated Two-Dimensional Lattices
 |journal=[[Physical Review B]]
 |volume=55
 |issue=5 |page=3104
 |doi=10.1103/PhysRevB.55.3104
|arxiv = cond-mat/9607217 |bibcode = 1997PhRvB..55.3104M |s2cid=119498444
 }}</ref>

===String-net liquid===
{{main|String-net liquid}}

In a string-net liquid, atoms have apparently unstable arrangement, like a liquid, but are still consistent in overall pattern, like a solid. When in a normal solid state, the atoms of matter align themselves in a grid pattern, so that the spin of any electron is the opposite of the spin of all electrons touching it. But in a string-net liquid, atoms are arranged in some pattern that requires some electrons to have neighbors with the same spin. This gives rise to curious properties, as well as supporting some unusual proposals about the fundamental conditions of the universe itself.

===Superglass===
{{Main|Superglass}}

A superglass is a phase of matter characterized, at the same time, by [[superfluid]]ity and a frozen amorphous structure.

=== Chain-melted state ===
{{Main|Chain-melted state}}

Metals, like potassium, in the chain-melted state appear to be in the liquid and solid state at the same time. This is a result of being subjected to high temperature and pressure, leading to the chains in the potassium to dissolve into liquid while the crystals remain solid.<ref>{{Cite web |last=Mann |first=Adam |date=2019-04-08 |title=Confirmed: New phase of matter is solid and liquid at same time |url=https://www.nationalgeographic.com/science/article/new-phase-matter-confirmed-solid-and-liquid-same-time-potassium-physics |archive-url=https://web.archive.org/web/20210414161939/https://www.nationalgeographic.com/science/article/new-phase-matter-confirmed-solid-and-liquid-same-time-potassium-physics |url-status=dead |archive-date=14 April 2021 |access-date=2023-11-13 |website=National Geographic |language=en}}</ref>

===Quantum Hall state===
{{main|Quantum Hall effect}}

A ''quantum Hall state'' gives rise to quantized [[Hall voltage]] measured in the direction perpendicular to the current flow. A ''[[Quantum spin Hall effect|quantum spin Hall state]]'' is a theoretical phase that may pave the way for the development of electronic devices that dissipate less energy and generate less heat. This is a derivation of the Quantum Hall state of matter.

===Photonic matter===
{{main|Photonic matter}}

Photonic matter is a phenomenon where [[photon]]s interacting with a gas develop apparent mass, and can interact with each other, even forming photonic "molecules". The source of mass is the gas, which is massive. This is in contrast to photons moving in empty space, which have no [[rest mass]], and cannot interact.