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Superconductor01:24

Superconductor

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...
Types Of Superconductors01:28

Types Of Superconductors

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...
Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...

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Related Experiment Video

Updated: Jun 30, 2026

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
13:58

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

RETRACTED: High-temperature superconductivity in lattice-expanded C60.

J H Schön1, C Kloc, B Batlogg

  • 1Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974, USA. hendrik@lucent.com

Science (New York, N.Y.)
|September 5, 2001
PubMed
Summary

Researchers achieved superconductivity in fullerene crystals doped with halogenated compounds, reaching a record transition temperature of 117 K. This advancement in fullerene superconductivity opens new avenues for materials science and low-temperature physics.

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Preparation and Characterization of C60/Graphene Hybrid Nanostructures
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Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Published on: May 15, 2018

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Preparation and Characterization of C60/Graphene Hybrid Nanostructures
08:40

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Published on: May 15, 2018

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid-State Chemistry

Background:

  • Fullerenes (C60) are carbon allotropes with unique electronic properties.
  • Intercalation and doping are key methods to tune the properties of fullerene crystals.
  • Superconductivity in fullerene-based materials is a significant area of research.

Purpose of the Study:

  • To investigate the effect of intercalating C60 single crystals with CHCl3 and CHBr3.
  • To induce high densities of charge carriers (electrons and holes) via gate doping.
  • To explore the superconducting properties of these modified fullerene systems at low temperatures.

Main Methods:

  • Intercalation of C60 single crystals with chloroform (CHCl3) and bromoform (CHBr3).
  • Fabrication of a field-effect transistor geometry for gate doping.
  • Induction of high carrier densities (electrons and holes).
  • Measurement of electrical resistance at low temperatures to determine superconducting transition temperatures (Tc).

Main Results:

  • Successful lattice expansion of C60 crystals upon intercalation with CHCl3 and CHBr3.
  • Achieved high densities of electrons and holes through gate doping.
  • Observed superconductivity in hole-doped C60/CHBr3.
  • Attained a maximum superconducting transition temperature (Tc) of 117 K in hole-doped C60/CHBr3.
  • Lattice spacing increase correlates with trends observed in alkali metal-doped C60.

Conclusions:

  • Intercalation with halogenated compounds effectively expands the C60 lattice.
  • Gate doping enables high carrier concentrations necessary for superconductivity.
  • Hole-doped C60/CHBr3 exhibits high-temperature superconductivity, reaching 117 K.
  • The observed trend suggests potential for achieving even higher Tc values in modified fullerene systems.