e-Journal of Surface Science and Nanotechnology · 2012 · 40 citations · 19 references
Superconducting MaterialEngineeringBismuth-based SuperconductorsUltrahigh VacuumSub-kelvin TemperatureVacuum DeviceMagnetic SensorMagnetismSurface ConductivitySuperconductivityQuantum MaterialsMicro-four-point ProbesElectrical EngineeringHigh-tc SuperconductivityUltrahigh Vacuum SystemPhysicsProbe SpacingMagnetic MeasurementMicroelectronicsElectrical PropertySurface CharacterizationHigh-temperature SuperconductivitySurface ScienceApplied PhysicsCondensed Matter PhysicsElectrical Insulation
We have constructed an ultrahigh vacuum system in which surface conductivity is measured in situ by micro-four-point probe method down to 0.8 K, combined with conventional surface preparation/analysis capability. In order to reduce the data scattering due to changes of the probe spacing, we have employed a dual configuration method in which the combinations with current/voltage probes are switched. The surface-state superconductivity of Si(111)-√7 × √3-In surface superstructure was confirmed with the critical temperature of 2.8 K. The critical magnetic field was 0.3-0.4 T in the surface-normal direction. [DOI: 10.1380/ejssnt.2012.400]
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Structures and electronic transport on silicon surfaces
Shuji Hasegawa, Xiao Tong, Sakura Takeda et al. · Progress in Surface Science · 1999 · 219 citations