Shubnikov–de Haas effect
E243120
The Shubnikov–de Haas effect is a quantum oscillatory phenomenon in the electrical resistance of conductors and semiconductors subjected to strong magnetic fields at low temperatures, used to probe their electronic structure and Fermi surface.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Shubnikov–de Haas effect canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2173676 — 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: Shubnikov–de Haas effect Context triple: [de Haas–van Alphen effect, relatedTo, Shubnikov–de Haas effect]
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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.
Szilard–Chalmers effect
The Szilard–Chalmers effect is a nuclear chemistry phenomenon in which atoms that undergo neutron capture and become radioactive are chemically separated from their original, non-activated atoms due to recoil-induced disruption of their chemical bonds.
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C.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
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D.
Meissner effect
The Meissner effect is the phenomenon in which a superconductor expels magnetic fields from its interior when cooled below its critical temperature, leading to perfect diamagnetism.
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E.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
- 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: Shubnikov–de Haas effect Target entity description: The Shubnikov–de Haas effect is a quantum oscillatory phenomenon in the electrical resistance of conductors and semiconductors subjected to strong magnetic fields at low temperatures, used to probe their electronic structure and Fermi surface.
-
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.
Szilard–Chalmers effect
The Szilard–Chalmers effect is a nuclear chemistry phenomenon in which atoms that undergo neutron capture and become radioactive are chemically separated from their original, non-activated atoms due to recoil-induced disruption of their chemical bonds.
-
C.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
-
D.
Meissner effect
The Meissner effect is the phenomenon in which a superconductor expels magnetic fields from its interior when cooled below its critical temperature, leading to perfect diamagnetism.
-
E.
Kapitza–Dirac effect
The Kapitza–Dirac effect is a quantum phenomenon in which a beam of particles, such as electrons or atoms, is diffracted by a standing wave of light, demonstrating the wave-particle duality of matter.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
magnetotransport phenomenon
ⓘ
quantum oscillatory phenomenon ⓘ solid-state physics effect ⓘ |
| cause | Landau quantization of electronic energy levels ⓘ |
| characteristicOf |
conductors
ⓘ
semiconductors ⓘ |
| contrastsWith | classical magnetoresistance ⓘ |
| dependsOn |
carrier concentration
ⓘ
magnetic field strength ⓘ scattering rate ⓘ temperature ⓘ |
| discoveredInField | magnetoresistance studies ⓘ |
| field |
condensed matter physics
ⓘ
low-temperature physics ⓘ semiconductor physics ⓘ |
| hasProperty |
damped by impurity scattering
ⓘ
damped by temperature ⓘ oscillatory dependence on inverse magnetic field ⓘ periodic in 1/B ⓘ quantum origin ⓘ sensitive to Fermi surface geometry ⓘ |
| isAspectOf | quantum oscillations in solids ⓘ |
| measurementType | transport measurement ⓘ |
| namedAfter |
Lev Shubnikov
ⓘ
Wander Johannes de Haas ⓘ |
| observedIn |
electrical resistance
ⓘ
magnetoresistance ⓘ |
| occursIn |
high-mobility semiconductor heterostructures
ⓘ
metals ⓘ semimetals ⓘ two-dimensional electron systems ⓘ |
| probes |
Fermi surface cross-sectional areas
ⓘ
density of states at the Fermi level ⓘ spin splitting in magnetic fields ⓘ |
| relatedTo |
de Haas–van Alphen effect
ⓘ
quantum Hall effect ⓘ |
| requires |
quantizing magnetic fields
ⓘ
well-defined Landau levels ⓘ |
| requiresCondition |
low temperature
ⓘ
strong magnetic field ⓘ |
| theoreticalDescription | Lifshitz–Kosevich formula ⓘ |
| usedFor |
characterizing topological materials
ⓘ
determining effective mass of charge carriers ⓘ estimating carrier mobility ⓘ mapping Fermi surface ⓘ measuring quantum lifetime of carriers ⓘ probing electronic structure ⓘ studying two-dimensional electron gases ⓘ |
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: Shubnikov–de Haas effect Description of subject: The Shubnikov–de Haas effect is a quantum oscillatory phenomenon in the electrical resistance of conductors and semiconductors subjected to strong magnetic fields at low temperatures, used to probe their electronic structure and Fermi surface.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.