von Klitzing constant
E160624
The von Klitzing constant is a fundamental physical constant that characterizes the quantized Hall resistance and provides a precise standard for electrical resistance in quantum metrology.
All labels observed (2)
| Label | Occurrences |
|---|---|
| von Klitzing constant canonical | 2 |
| von Klitzing | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1403717 — 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: von Klitzing constant Context triple: [CODATA recommended values of the fundamental physical constants, includesConstant, von Klitzing constant]
-
A.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
-
B.
Boltzmann constant
The Boltzmann constant is a fundamental physical constant that links temperature to energy at the particle level, playing a central role in statistical mechanics and thermodynamics.
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C.
Planck constant
The Planck constant is a fundamental physical constant that quantifies the relationship between the energy of a photon and the frequency of its associated electromagnetic wave, forming a cornerstone of quantum mechanics.
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D.
London equations
The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
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E.
Kretschmann
Kretschmann is a German surname most prominently associated with actor Thomas Kretschmann, known for his roles in international film and television.
- 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: von Klitzing constant Target entity description: The von Klitzing constant is a fundamental physical constant that characterizes the quantized Hall resistance and provides a precise standard for electrical resistance in quantum metrology.
-
A.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
-
B.
Boltzmann constant
The Boltzmann constant is a fundamental physical constant that links temperature to energy at the particle level, playing a central role in statistical mechanics and thermodynamics.
-
C.
Planck constant
The Planck constant is a fundamental physical constant that quantifies the relationship between the energy of a photon and the frequency of its associated electromagnetic wave, forming a cornerstone of quantum mechanics.
-
D.
London equations
The London equations are fundamental relations in superconductivity that describe how magnetic fields behave inside superconductors, capturing key features like the Meissner effect and zero electrical resistance.
-
E.
Kretschmann
Kretschmann is a German surname most prominently associated with actor Thomas Kretschmann, known for his roles in international film and television.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
fundamental physical constant
ⓘ
physical constant ⓘ quantum Hall effect constant ⓘ |
| appearsIn |
integer quantum Hall effect
ⓘ
metrological triangle experiments ⓘ |
| belongsTo |
set of electromagnetic constants
ⓘ
set of quantum electrical standards ⓘ |
| definedAs | h/e^2 ⓘ |
| dependsOn |
Planck constant
ⓘ
elementary charge ⓘ |
| describes | quantized Hall resistance ⓘ |
| hasApproximateValue |
2.581280745×10^4 ohm
ⓘ
25812.80745 ohm ⓘ |
| hasCODATAIdentifier | R_K ⓘ |
| hasDimension | electrical resistance ⓘ |
| hasInverse | conductance quantum ⓘ |
| hasPhysicalMeaning | resistance of a single quantum Hall plateau at filling factor 1 ⓘ |
| hasSIUnit | ohm ⓘ |
| introducedInContextOf | discovery of the quantum Hall effect ⓘ |
| isDefinedBy | fixed numerical values of h and e in the SI ⓘ |
| isExactInSI | true ⓘ |
| isInvarianceProperty | topological robustness of quantum Hall plateaus ⓘ |
| isPartOf | International System of Units ⓘ |
| isRealizedBy |
quantum Hall resistance devices
ⓘ
two-dimensional electron gas in strong magnetic field ⓘ |
| namedAfter | Klaus von Klitzing ⓘ |
| playsRoleIn |
electrical resistance standards
ⓘ
realization of the ohm ⓘ |
| quantizes | Hall resistance plateaus ⓘ |
| relatedConstant | conductance quantum ⓘ |
| relatedTo |
Planck constant
ⓘ
elementary charge ⓘ fine-structure constant ⓘ quantum Hall effect ⓘ |
| standardizedBy |
International Bureau of Weights and Measures
ⓘ
surface form:
BIPM
CODATA ⓘ |
| symbol | R_K ⓘ |
| usedAs | standard of electrical resistance ⓘ |
| usedBy | national metrology institutes ⓘ |
| usedFor |
consistency checks of fundamental constants
ⓘ
high-precision tests of quantum electrodynamics ⓘ |
| usedIn |
quantum Hall effect experiments
ⓘ
quantum metrology ⓘ |
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: von Klitzing constant Description of subject: The von Klitzing constant is a fundamental physical constant that characterizes the quantized Hall resistance and provides a precise standard for electrical resistance in quantum metrology.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
CODATA recommended values of the fundamental physical constants
→
includesConstant
→
von Klitzing constant
ⓘ
this entity surface form:
von Klitzing