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Related Concept Videos

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.
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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...
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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Published on: August 2, 2019

Holographic Josephson junctions.

Gary T Horowitz1, Jorge E Santos, Benson Way

  • 1Department of Physics, University of California, Santa Barbara, California 93106-4030, USA.

Physical Review Letters
|June 28, 2011
PubMed
Summary
This summary is machine-generated.

Researchers created a gravitational model for Josephson junctions, accurately predicting current-phase relationships and temperature/size dependencies for maximum current.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics
  • Gravitational Duality

Background:

  • Josephson junctions are fundamental in quantum electronics.
  • Understanding their behavior is crucial for device applications.
  • Existing models describe their electrical properties.

Purpose of the Study:

  • To develop a holographic (gravitational) description of a Josephson junction.
  • To verify if gravitational duality can reproduce known Josephson junction physics.
  • To explore temperature and size effects on junction properties via this duality.

Main Methods:

  • Constructing a gravitational dual model for a Josephson junction.
  • Performing calculations within the gravitational framework.
  • Analyzing the relationship between superconducting condensate phase and current.

Main Results:

  • The gravitational model successfully reproduces the standard current-phase relation.
  • The model accurately predicts the dependence of maximum supercurrent on temperature.
  • The model also captures the influence of junction size on critical current.

Conclusions:

  • Gravitational duality provides a valid framework for describing Josephson junctions.
  • This approach offers new insights into quantum phenomena through a holographic lens.
  • The results align with established condensed matter physics principles.