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Videos de Conceptos Relacionados

MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
MOSFET01:16

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...

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Video Experimental Relacionado

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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

Logía de semiconductores reconfigurables controlados por el campo magnético.

Sungjung Joo1, Taeyueb Kim, Sang Hoon Shin

  • 1Spin Convergence Research Center, KIST, Seoul 130-650, South Korea.

Nature
|February 1, 2013
PubMed
Resumen

Los investigadores desarrollaron un nuevo dispositivo de lógica magnética utilizando semiconductores de antimonuro de indio (InSb). Este dispositivo ofrece funciones lógicas reconfigurables y memoria no volátil, allanando el camino para una computación eficiente y de baja potencia.

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Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
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Área de la Ciencia:

  • Spintronics es una empresa de Spintronics.
  • Física de los dispositivos de semiconductores Física de los dispositivos de semiconductores
  • Dispositivos de lógica magnética Dispositivos de lógica magnética

Sus antecedentes:

  • Los dispositivos de lógica magnética prometen una mayor eficiencia computacional y un menor consumo de energía.
  • Los enfoques de lógica magnética existentes se enfrentan a desafíos con la relación señal-ruido y el rendimiento.
  • Los métodos tradicionales a menudo se basan en el transporte dependiente del giro, lo que limita las aplicaciones prácticas.

Objetivo del estudio:

  • Desarrollar un dispositivo lógico magnético que supere las limitaciones de las tecnologías existentes.
  • Para utilizar gran magnetorresistencia en semiconductores no magnéticos para operaciones lógicas.
  • Para demostrar un nuevo enfoque para la lógica de semiconductores controlados por campos magnéticos.

Principales métodos:

  • Empleó gran magnetorresistencia en los canales de doble capa p-n de antimonuro de indio (InSb) bajo campos eléctricos fuertes.
  • Se investigó el control magnético de la generación y recombinación de portadoras.
  • Fabricó y probó circuitos simples que realizan funciones lógicas booleanas (AND, OR, NAND, NOR).

Principales resultados:

  • Se informó de un dispositivo con fuertes características de diodo sensible al signo y la magnitud del campo magnético.
  • Comutación reversible demostrada entre dos estados característicos a través de la aplicación de un campo magnético.
  • Lograr la programación dinámica de funciones lógicas utilizando señales eléctricas o magnéticas externas a temperatura ambiente.

Conclusiones:

  • La lógica reconfigurable de semiconductores controlados por campos magnéticos a temperatura ambiente es factible.
  • La tecnología desarrollada permite una nueva clase de dispositivos espintrónicos que actúan como interruptores de corriente.
  • Proporciona una plataforma simple y compacta para dispositivos lógicos no volátiles y reconfigurables.