Resistivity of high-Tc superconductors: Linear in T at constant p, non-linear at constant V

• The observed constant-pressure resistivity varrhop of most high-Tc superconductors is linear in temperature T over large ranges. We show that this is not true for the constant-volume resistivity varrhov; for 1–2–3 YBCO the correction from varrhop to varrhov is -32% at 500 K relative to the low-T value. Since theory predicts varrhov rather than varrhop, the observed linearity of varrho probably cannot be used as a tool to choose between theories for high-Tc superconductivity.

Ämnesord

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

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

Nyckelord

Electric resistivity

superconductors

high transition temperature superconductors

Hi-Tc

HTS

high pressure

isobaric conditions

isochoric conditions

Condensed matter physics

Kondenserade materiens fysik

Superconductivity

Supraledning

fysik

Physics

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