Constant-pressure versus constant-volume resistivities of some high transition temperature superconductors

• The resistivity varrho is always measured at constant p, while theory assumes constant V. For high temperature superconductors there are large differences between constant-p and constant-V resistivities. We have previously shown constant-V results for YBa2Cu3O7−δ and show here similar data for La2−xSrxCuO4. Constant-V data for varrho agree with the behaviour expected for a normal metal, with low-T linearity in T and saturation at high T. We speculate that similar effects will be observed in doped fullerenes (M3C60, M = Li, K, Rb, …).

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

Resistivity

constant-volume conditions

isochoric resistivity

high transition temperature superconductors

HiTc

HTS

Condensed matter physics

Kondenserade materiens fysik

Superconductivity

Supraledning

fysik

Physics

Publication and Content Type

ref (subject category)

kon (subject category)