Slichter–Hebel coherence peak
E662214
The Slichter–Hebel coherence peak is a characteristic enhancement in nuclear spin-lattice relaxation just below the superconducting transition temperature, providing key experimental evidence for conventional BCS superconductivity.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Slichter–Hebel coherence peak canonical | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
nuclear magnetic resonance effect
ⓘ
physical phenomenon ⓘ superconductivity phenomenon ⓘ |
| absentIn | many unconventional superconductors ⓘ |
| appearsIn | temperature dependence of nuclear spin-lattice relaxation ⓘ |
| characteristicOf |
BCS superconductors
ⓘ
conventional superconductors ⓘ |
| contrastsWith | monotonic decrease of 1/T1 expected without coherence factors ⓘ |
| dependsOn |
density of states near the gap edge
ⓘ
superconducting energy gap ⓘ |
| energyScale | set by the superconducting gap magnitude ⓘ |
| field |
condensed matter physics
ⓘ
nuclear magnetic resonance ⓘ superconductivity ⓘ |
| firstObservedIn | conventional low-Tc superconductors ⓘ |
| firstReportedBy |
Charles P. Slichter
NERFINISHED
ⓘ
Leonard C. Hebel NERFINISHED ⓘ |
| historicalSignificance | early experimental confirmation of BCS superconductivity ⓘ |
| indicates | opening of a superconducting energy gap with coherence effects ⓘ |
| mathematicallyDescribedBy | BCS relaxation-rate formulas including coherence factors ⓘ |
| measurementTechnique |
nuclear magnetic resonance
ⓘ
nuclear quadrupole resonance ⓘ |
| namedAfter |
Charles P. Slichter
NERFINISHED
ⓘ
Leonard C. Hebel NERFINISHED ⓘ |
| observedIn | NMR experiments on superconducting metals ⓘ |
| occursIn | superconducting state ⓘ |
| occursJustBelow | critical temperature Tc ⓘ |
| occursNear | superconducting transition temperature ⓘ |
| providesEvidenceFor |
BCS theory of superconductivity
NERFINISHED
ⓘ
isotropic s-wave pairing ⓘ |
| relatedTo |
1/T1 relaxation rate
ⓘ
nuclear spin-lattice relaxation rate ⓘ |
| relevantTo | electron-phonon mediated superconductivity ⓘ |
| sensitiveTo |
gap anisotropy
ⓘ
magnetic field ⓘ quasiparticle lifetime broadening ⓘ spin-orbit scattering ⓘ |
| signature | enhancement of 1/T1 below Tc relative to normal-state extrapolation ⓘ |
| suppressedBy |
anisotropic or nodal gaps
ⓘ
magnetic impurities ⓘ strong electron correlations ⓘ strong impurity scattering ⓘ |
| temperatureDependence | appears just below Tc and decreases at lower temperatures ⓘ |
| theoreticalBasis |
BCS coherence factors
ⓘ
BCS quasiparticle excitations ⓘ |
| usedAs |
diagnostic of pairing symmetry
ⓘ
test of BCS coherence factors ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.