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Related Concept Videos

Superconductor01:24

Superconductor

1.2K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Types Of Superconductors01:28

Types Of Superconductors

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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Theory of Metallic Conduction01:17

Theory of Metallic Conduction

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The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
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Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

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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.
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Nanowire bolometer using a 2D high-temperature superconductor.

Sanat Ghosh1, Digambar A Jangade1, Mandar M Deshmukh1

  • 1Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India.

Nanotechnology
|September 30, 2022
PubMed
Summary
This summary is machine-generated.

We developed a non-invasive method to create high-temperature superconductor nanowires for sensitive bolometers. These nanowires show high responsivity and potential for performance improvements near liquid-nitrogen temperatures.

Keywords:
BSCCObolometerhigh-Tc superconductorphase slipssuperconducting nanowire

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Superconducting nanowires are crucial for quantum technology and astronomical applications.
  • Fabricating high-temperature superconductor nanowires requires precise and scalable methods.

Purpose of the Study:

  • To implement a non-invasive process for fabricating high-Tc superconductor Bi2Sr2CaCu2O8+ nanowires.
  • To demonstrate the use of these nanowires as sensitive bolometers in the visible spectrum.
  • To investigate the performance scalability and operating characteristics of these superconducting bolometers.

Main Methods:

  • Non-invasive fabrication of Bi2Sr2CaCu2O8+ nanowires.
  • Characterization of nanowire properties, including responsivity and photovoltage.
  • Investigation of phase slip events in narrow nanowires at low temperatures.

Main Results:

  • Achieved very high bolometer responsivity (9.7 × 103 V W-1) in the visible range.
  • Observed bias current-dependent localized photovoltage spots in long nanowires.
  • Demonstrated scalability of responsivity with normal state resistance, suggesting performance enhancement through meander geometry.
  • Observed phase slip events in small cross-section nanowires at low temperatures.

Conclusions:

  • Presents a scalable method for fabricating sensitive bolometers from high-Tc superconductor nanowires.
  • Highlights the potential for these bolometers to operate effectively near liquid-nitrogen temperatures.
  • Suggests pathways for further performance improvement by optimizing nanowire geometry and length.