La2CuO4
E484697
La2CuO4 is a copper-oxide compound that serves as the undoped parent material of high-temperature cuprate superconductors, exhibiting strong electron correlations and antiferromagnetic order.
All labels observed (3)
| Label | Occurrences |
|---|---|
| La2CuO4 canonical | 2 |
| La2−xBaxCuO4 | 1 |
| La2−xCaxCuO4 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4975754 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: La2CuO4 Context triple: [Mott insulator, exampleMaterial, La2CuO4]
-
A.
Fedora Kinoite
Fedora Kinoite is an official Fedora Linux variant that provides an immutable, KDE Plasma–based desktop system using rpm-ostree for atomic updates and reliability.
-
B.
Canningite
Canningite refers to a follower or supporter of British statesman George Canning, typically associated with his moderate, liberal Tory political views in the early 19th century.
-
C.
Combarbalite
Combarbalite is a distinctive semi-precious ornamental stone, prized for its varied colors and patterns, that is uniquely found and traditionally worked in the Combarbalá area of Chile.
-
D.
Schrieffer
Schrieffer is the surname of John Robert Schrieffer, the American physicist and Nobel laureate known for co-developing the BCS theory of superconductivity.
-
E.
Agagite
An Agagite is a biblical designation likely referring to a descendant or follower of Agag, the Amalekite king, and is notably associated with Haman in the Book of Esther.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: La2CuO4 Target entity description: La2CuO4 is a copper-oxide compound that serves as the undoped parent material of high-temperature cuprate superconductors, exhibiting strong electron correlations and antiferromagnetic order.
-
A.
Fedora Kinoite
Fedora Kinoite is an official Fedora Linux variant that provides an immutable, KDE Plasma–based desktop system using rpm-ostree for atomic updates and reliability.
-
B.
Canningite
Canningite refers to a follower or supporter of British statesman George Canning, typically associated with his moderate, liberal Tory political views in the early 19th century.
-
C.
Combarbalite
Combarbalite is a distinctive semi-precious ornamental stone, prized for its varied colors and patterns, that is uniquely found and traditionally worked in the Combarbalá area of Chile.
-
D.
Schrieffer
Schrieffer is the surname of John Robert Schrieffer, the American physicist and Nobel laureate known for co-developing the BCS theory of superconductivity.
-
E.
Agagite
An Agagite is a biblical designation likely referring to a descendant or follower of Agag, the Amalekite king, and is notably associated with Haman in the Book of Esther.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Mott insulator
ⓘ
antiferromagnet ⓘ copper oxide ⓘ cuprate ⓘ inorganic compound ⓘ |
| bandGapType | charge-transfer gap ⓘ |
| belongsToFamily | 214 cuprates ⓘ |
| chemicalFormula | La2CuO4 ⓘ |
| containsElement |
copper
ⓘ
lanthanum ⓘ oxygen ⓘ |
| containsStructuralUnit | CuO2 planes ⓘ |
| coordinationEnvironment | CuO6 octahedra ⓘ |
| crystalStructure | K2NiF4-type ⓘ |
| crystalSystem |
orthorhombic (low temperature phase)
ⓘ
tetragonal ⓘ |
| discoveredAsParentOf | La2−xBaxCuO4 superconductor ⓘ |
| electronicStructure | Cu2+ (3d9) ions in CuO2 planes ⓘ |
| hasAbbreviation | LCO ⓘ |
| hasDimensionality | quasi-two-dimensional electronic structure ⓘ |
| hasExchangeInteraction | strong antiferromagnetic superexchange via oxygen ⓘ |
| hasProperty |
antiferromagnetic order
ⓘ
charge-transfer insulator behavior ⓘ strong electron correlations ⓘ |
| hasTransition |
Néel transition to antiferromagnetic order
ⓘ
structural tetragonal-orthorhombic transition ⓘ |
| hostLatticeFor |
Ba-doped La2−xBaxCuO4 superconductors
ⓘ
Sr-doped La2−xSrxCuO4 superconductors ⓘ |
| isUndopedParentOf | high-temperature cuprate superconductors ⓘ |
| magneticOrder | antiferromagnetic ⓘ |
| NéelTemperatureApprox | ~300 K ⓘ |
| parentCompoundOf |
La2−xBaxCuO4
ⓘ
linked to:
La2CuO4
La2−xCaxCuO4 ⓘ
linked to:
La2CuO4
La2−xSrxCuO4 ⓘ |
| relatedToConcept |
cuprate superconductors
ⓘ
high-temperature superconductivity ⓘ spin-1/2 Heisenberg antiferromagnet on a square lattice ⓘ strongly correlated electron systems ⓘ |
| spaceGroup |
Bmab (low temperature)
ⓘ
I4/mmm (high temperature) ⓘ |
| superconductivityUponDopingWith |
barium
ⓘ
calcium ⓘ strontium ⓘ |
| synthesisMethod | solid-state reaction of La2O3 and CuO ⓘ |
| usedAs |
benchmark material for strongly correlated electron theories
ⓘ
model system for cuprate physics ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: La2CuO4 Description of subject: La2CuO4 is a copper-oxide compound that serves as the undoped parent material of high-temperature cuprate superconductors, exhibiting strong electron correlations and antiferromagnetic order.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: La2CuO4
linked to: La2CuO4