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Related Concept Videos

Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Bewley Lattice Diagram01:12

Bewley Lattice Diagram

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Energy Stored In A Coaxial Cable

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The de Broglie Wavelength

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Magnetic Force On Current-Carrying Wires: Example01:22

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Interlevel cascade transition in electrically confined quantum wire arrays.

Wei Wu1, Iman Hassani, Hooman Mohseni

  • 1Bio-inspired Sensors and Optoelectronics Laboratory (BISOL), Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, Illinois 60208, USA.

ACS Nano
|August 23, 2011
PubMed
Summary

Vertical quantum wire stacks show current plateaus and conductance oscillations above liquid nitrogen temperatures due to carrier interlevel transitions. Simulations confirm experimental data on charge transport and infrared photoresponse shifts from electric field confinement.

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Area of Science:

  • Semiconductor physics
  • Quantum electronics
  • Nanotechnology

Background:

  • Quantum wires are crucial for advanced electronic devices.
  • Understanding carrier behavior in confined structures is key to device performance.
  • Previous research focused on lower temperatures or different confinement methods.

Purpose of the Study:

  • To demonstrate vertical stacks of electrically confined quantum wires in large-area devices.
  • To investigate carrier transport phenomena at above liquid nitrogen temperatures.
  • To validate simulation models with experimental observations.

Main Methods:

  • Fabrication of vertical quantum wire stacks.
  • Electrical transport measurements at various temperatures.
  • Differential conductance spectroscopy.
  • Infrared photoresponse measurements.
  • Charge transport simulations incorporating lateral electric field confinement.

Main Results:

  • Successful demonstration of vertical quantum wire stacks in large-area devices.
  • Observation of multiple current plateaus and strong differential conductance oscillations above liquid nitrogen temperatures.
  • Experimental data shows good agreement with simulation results for charge transport.
  • Simulations predict and experiments confirm interlevel infrared photoresponse red-shift due to lateral electric field confinement.

Conclusions:

  • Vertical quantum wire stacks are viable for high-temperature electronic applications.
  • Interlevel cascade transitions significantly influence carrier transport in these structures.
  • Lateral electric field confinement plays a critical role in device characteristics and photoresponse.