Editing Conventional superconductor

{{short description|Materials that display superconductivity as described by BCS theory or its extensions}}
{{one source |date=March 2024}}
'''Conventional superconductors''' are materials that display [[superconductivity]] as described by [[BCS theory]] or its extensions. This is in contrast to [[unconventional superconductor]]s, which do not. Conventional superconductors can be either [[Type-I superconductor|type-I]] or [[Type-II superconductor|type-II]].

Most [[chemical element|elemental]] superconductors are conventional. Niobium and vanadium are type-II, while most other elemental superconductors are type-I. Critical temperatures of some elemental superconductors:
{| class="wikitable"
|-
! Element
! ''T<sub>c</sub>'' ([[Kelvin|K]])
|-
| [[Aluminium|Al]]
| 1.20
|-
| [[Mercury (element)|Hg]]
| 4.15
|-
| [[Molybdenum|Mo]]
| 0.92
|-
| [[Niobium|Nb]]
| 9.26
|-
| [[Lead|Pb]]
| 7.19
|-
| [[Tin|Sn]]
| 3.72
|-
| [[Tantalum|Ta]]
| 4.48
|-
| [[Titanium|Ti]]
| 0.39
|-
| [[Vanadium|V]]
| 5.30
|-
| [[Zinc|Zn]]
| 0.88
|}

Most compound and alloy superconductors are type-II materials. The most commonly used conventional superconductor in applications is a [[niobium-titanium]] alloy - this is a type-II superconductor with a superconducting critical temperature of 11 K. The highest critical temperature so far achieved in a conventional superconductor was 39 K (-234 °C) in [[magnesium diboride]].

==BKBO==
Ba<sub>0.6</sub>K<sub>0.4</sub>BiO<sub>3</sub> is an unusual superconductor (a non-cuprate oxide) - but considered 'conventional' in the sense that the BCS theory applies.<ref>{{cite journal|title=Electrical and magnetic transport properties of laser‐deposited Ba1−xKxBiO3 thin films|date=1992 |url=http://dvh.physics.illinois.edu/publications/Schweinfurth,%20Dale%202.pdf|doi=10.1063/1.107863 |last1=Schweinfurth |first1=R. A. |last2=Platt |first2=C. E. |last3=Teepe |first3=M. R. |last4=Van Harlingen |first4=D. J. |journal=Applied Physics Letters |volume=61 |issue=4 |pages=480–482 |bibcode=1992ApPhL..61..480S }}</ref>

== See also ==

* [[Matthias rules]]

==References==
{{Reflist}}

{{Superconductivity}}

[[Category:Superconductors]]


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