Opportunities in High Magnetic Field Science (2005) / Chapter Skim
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Appendix G Tutorial on High-Temperature Superconductivity
Appendix G Tutorial on High-Temperature Superconductivity
Pages 162-165
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From page 162... ...
G Tutorial on High-Temperature Superconductivity H igh-temperature superconductor materials and low-temperature super conductor materials differ markedly in charge response, as measured by transport and optical experiments; spin response, as indicated by static susceptibility, NMR, and inelastic neutron scattering experiments; and in singleparticle spectral density, as evidenced by angle-resolved photoemission studies (ARPES)
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From page 163... ...
Superfluid density, s, in HTS materials is a key quantity that speaks to the nature of high-temperature superconductivity, and it can be studied using high magnetic fields. At zero temperature, s is a direct measure of the electronic states that participate in superconductivity, and at low temperatures, it probes low-lying, quasi-particle states, reflecting the symmetry of the order parameter.
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From page 164... ...
Another important direction is the study of the superconductor-insulator transition at high magnetic fields by observing the shift of the spectral weight from low to high frequencies as a superconducting or normal state appears in the excitation spectrum. The behavior of s at zero temperature as a function of doping could also shed new light on the possible non-Fermi liquid nature of HTS materials.
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From page 165... ...
The effect of magnetic fields perpendicular to Cu-O planes is also of great interest. Vortex arrays that form in a superconducting domain govern the magnetic and transport properties (see Appendix H)
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