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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
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Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
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From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
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Related Experiment Video

Updated: Nov 3, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Multiterminal Quantized Conductance in InSb Nanocrosses.

Sabbir A Khan1,2, Lukas Stampfer2, Timo Mutas2

  • 1Microsoft Quantum Materials Lab Copenhagen, Lyngby, 2800, Denmark.

Advanced Materials (Deerfield Beach, Fla.)
|June 2, 2021
PubMed
Summary

Researchers synthesized single-crystalline Indium Antimonide nanocrosses (NCs) using molecular beam epitaxy. Electrical studies revealed quantized conductance and ballistic transport, paving the way for topological quantum states in Josephson junctions.

Keywords:
multi-terminal quantum devicesnanocrossesnanowiresquantized conductancesemiconductor/superconductor epitaxy

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Indium Antimonide (InSb) nanowires (NWs) are promising for electronic applications.
  • Controlled synthesis of complex nanostructures like nanocrosses (NCs) is challenging.
  • Understanding transport properties in nanostructures is crucial for device development.

Purpose of the Study:

  • To map the synthesis conditions for single-crystalline InSb nanocrosses (NCs).
  • To investigate the low-temperature electrical transport properties of InSb NCs.
  • To explore the potential of InSb NCs for realizing topological quantum states.

Main Methods:

  • Molecular beam epitaxy (MBE) was used to grow InSb nanowires and nanocrosses.
  • Time-dependent axial and radial growth studies were performed.
  • Low-temperature electrical measurements with local gate control were conducted.

Main Results:

  • Conditions for synthesizing single-crystalline InSb nanocrosses were established.
  • Quantized conductance and ballistic transport were observed in InSb NC devices.
  • Transport through the NC junction was found to be ballistic except near pinch-off.

Conclusions:

  • The study provides a pathway for fabricating InSb nanocrosses with controlled properties.
  • The observed transport phenomena highlight the potential for quantum effects.
  • The reported structures show promise for creating multi-terminal Josephson junctions for topological states.