Shot-noise and conductance measurements of transparent superconductor / two-dimensional electron gas junctions
arXiv:cond-mat/0410621 · doi:10.1103/PhysRevB.72.024501
Abstract
We have measured the conductance and shot-noise of superconductor-normal metal (S-N) junctions between a Niobium (Nb) film and a 2-dimensional electron gas (2DEG), formed in an InAs-based semiconductor heterostructure. Adjacent to the junction, the 2DEG is shaped into a submicrometer beam-splitter. The current shot-noise measured through one arm of the beam-splitter is found to be enhanced due to Andreev reflection. Both noise and conductance measurements indicate that the Nb-2DEG interface is of high quality with a transparency approaching approx. 60-70 %. The present device can be seen as a quasi-ballistic S-N beam-splitter junction.
full paper including figures can be retrieved from: http://www.unibas.ch/phys-meso/Research/Papers/2004/Shot-Noise-Yjunction.pdf
References in corpus (34)
- Quantum Computation with Quantum Dots
- Shot Noise in Mesoscopic Conductors
- Observation of the e/3 Fractionally Charged Laughlin Quasiparticles
- Andreev-Tunneling, Coulomb Blockade, and Resonant Transport of Non-Local Spin-Entangled Electrons
- Electronic Entanglement in the Vicinity of a Superconductor
- Universal Quantum Signatures of Chaos in Ballistic Transport
- Probing Entanglement and Non-locality of Electrons in a Double-Dot via Transport and Noise
- Noise of Entangled Electrons: Bunching and Antibunching
- Bell inequalities and entanglement in solid state devices
- Quantum Shot Noise
- Spin-Dependent Josephson Current through Double Quantum Dots and Measurement of Entangled Electron States
- Quantum entanglement in carbon nanotubes
- The 1/3-shot noise suppression in diffusive nanowires
- Quantum Information is Physical
- Superconductor coupled to two Luttinger liquids as an entangler for electron spins
- Observation of Andreev Reflection Enhanced Shot Noise
- Positive and negative Hanbury-Brown and Twiss correlations in normal metal-superconducting devices
- Doubled Shot Noise In Disordered Normal-Metal-Superconductor Junctions
- Supercurrent noise in quantum point contacts
- Full Counting Statistics of a Superconducting Beam Splitter
- Multiple Andreev Reflection and Giant Excess Noise in Diffusive Superconductor/Normal-Metal/Superconductor Junctions
- Chaotic dot-superconductor analog of the Hanbury Brown Twiss effect
- Shot Noise by Quantum Scattering in Chaotic Cavities
- Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions
- Scaling Theory of Conduction Through a Normal-Superconductor Microbridge
- Single Carbon Nanotube--Superconductor Entangler: noise correlations and EPR states
- Semi-classical Theory of Conductance and Noise in Open Chaotic Cavities
- Spin-accumulation and Andreev-reflection in a mesoscopic ferromagnetic wire
- Semiclassical theory of shot noise in disordered SN contacts
- Effective charges and statistical signatures in the noise of normal metal--superconductor junctions at arbitrary bias
- Semiclassical theory of current correlations in chaotic dot-superconductor systems
- Phase Sensitive Shot Noise in an Andreev Interferometer
- Inelastic relaxation and noise temperature in S/N/S junctions
- Hanbury Brown Twiss effects in channel mixing normal-superconducting systems
Cited by in corpus (23)
- Tunable light trapping and absorption enhancement with graphene ring arrays
- Current and noise correlations in a double dot Cooper pair beam splitter
- Vanishing thermal equilibration for hole-conjugate fractional quantum Hall states in graphene
- Detecting entangled states in graphene via crossed Andreev reflection
- Positive noise cross-correlations in superconducting hybrids: Roles of interfaces and interactions
- Energy entanglement in normal metal-superconducting forks
- The density of states of chaotic Andreev billiards
- Andreev reflection in s-type superconductor proximized 3D topological insulator
- Order, disorder and tunable gaps in the spectrum of Andreev bound states in a multi-terminal superconducting device
- Electron waiting times in hybrid junctions with topological superconductors
- Contact superconductivity in In-PbTe junctions
- Quantized conductance with non-zero shot noise as a signature of Andreev edge state
- Charge-neutral nonlocal response in superconductor-InAs nanowire hybrid devices
- Magnetic focusing in normal-superconductor hybrid systems: a semiclassical analysis
- Enhanced shot noise at bilayer graphene -- superconductor junction
- Noise insights into electronic transport
- Full counting statistics of Andreev scattering in an asymmetric chaotic cavity
- Quasiparticle transport in arrays of chaotic cavities
- Noise of a chargeless Fermi liquid
- Divergent beams of nonlocally entangled electrons emitted from hybrid normal-superconducting structures
- Entangling electrons by splitting Cooper pairs: Two-particle conductance resonance and time coincidence measurements
- Maximal positive cross shot noise from Andreev reflection
- Shot noise in HTc superconductor quantum point contact system