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Photothermal microscope for high-critical temperature superconductors and charge density waves.

Author(s) : WU X. D., KINO G. S., FANTON J. T., KAPITULNIK A.

Type of article: Article

Summary

The authors developed a new photothermal technique to investigate electronic phase transitions associated with high-temperature superconductivity and charge density waves. The phase shift of the thermal wave yields the anisotropic thermal diffusivity coefficient of the sample. The amplitude of the photothermal signal is sensitive to electronic phase transitions of the second kind and measures directly the effect of thermodynamic fluctuations near the transitions. This noncontacting high-definition technique is well suited to measurements of small and fragile samples. Good comparisons between the experimental results and second-order phase transition theory are obtained on a high-critical temperature superconductor and a charge density wave sample.

Details

  • Original title: Photothermal microscope for high-critical temperature superconductors and charge density waves.
  • Record ID : 1994-2082
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 64 - n. 11
  • Publication date: 1993/11
  • Document available for consultation in the library of the IIR headquarters only.

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