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Biasing of Metal-Semiconductor Junctions01:27

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
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Tunnel Josephson Junction with Spin-Orbit/Ferromagnetic Valve.

Alexey Neilo1,2, Sergey Bakurskiy1,2, Nikolay Klenov1,3

  • 1National University of Science and Technology MISIS, 119049 Moscow, Russia.

Nanomaterials (Basel, Switzerland)
|July 14, 2023
PubMed
Summary

We theoretically studied a superconductor-insulator-normal metal with spin-orbit interaction-ferromagnet structure. Rotating magnetization in the ferromagnet layer allows tunable critical current in this Josephson junction, optimizing spin valve effects.

Keywords:
Josephson junctionferromagneticspin valvespintronicsspin–orbit interactionsuperconducting quantum computers

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Area of Science:

  • Condensed matter physics
  • Spintronics
  • Superconductivity

Background:

  • Josephson junctions are crucial for superconducting electronics.
  • Spin-orbit interaction (SOI) and ferromagnetism influence superconducting properties.
  • Understanding SIsNSOF structures is key for advanced spintronic devices.

Purpose of the Study:

  • To theoretically investigate the transport properties of the SIsNSOF structure.
  • To explore the tunability of critical current via magnetization rotation.
  • To determine optimal parameters for the spin valve effect.

Main Methods:

  • Theoretical analysis of the SIsNSOF multilayer structure.
  • Modeling of superconductivity, ferromagnetism, and spin-orbit interaction.
  • Calculation of critical current and spin valve effect amplitude.

Main Results:

  • The critical current of the Josephson junction can be smoothly tuned over a wide range.
  • Magnetization rotation in the ferromagnetic layer directly controls the critical current.
  • Optimal parameter ranges for the spin valve effect were identified.

Conclusions:

  • The SIsNSOF structure offers a promising platform for tunable superconducting spintronic devices.
  • Precise control over critical current is achievable through magnetization manipulation.
  • This study provides insights for designing efficient spin valve devices.