Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 Paul M. Grant.

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Presentation transcript:

Paul M. Grant High-T C : The IBM Almaden Story Paul M. Grant

High-T C : The IBM Almaden Story Models of Electrical Conductivity e-e- Resistance  Temperature 

Paul M. Grant High-T C : The IBM Almaden Story A Big Surprise! Thus the mercury at 4.2 K has entered a new state, which, owing to its particular electrical properties, can be called the state of superconductivit y H. Kamerlingh-Onnes (1911)

Paul M. Grant High-T C : The IBM Almaden Story Physics of Superconductivity e-e- e-e- Electrons Pair Off! T R TCTC

Paul M. Grant High-T C : The IBM Almaden Story : The Discovery of High-Tc! La 1-x Ba x CuO 4+ 

Paul M. Grant High-T C : The IBM Almaden Story November 25, 1986 Houston

Paul M. Grant High-T C : The IBM Almaden Story January 30, 1987 Alabama Houston

Paul M. Grant High-T C : The IBM Almaden Story It’s “1-2-3!”

Paul M. Grant High-T C : The IBM Almaden Story Oxygen is the Key

Paul M. Grant High-T C : The IBM Almaden Story (Almost) All REs Work! JACS, April, 1987

Paul M. Grant High-T C : The IBM Almaden Story Woodstock, NYC, 1987 Physicists’ Night Out!

Paul M. Grant High-T C : The IBM Almaden Story May, 1987 Superconductivity in Undoped La 2 CuO 4 Due to Excess Oxygen High-Tc could have been found in the 1950s PRL, June, 1987

Paul M. Grant High-T C : The IBM Almaden Story : The Prize!

Paul M. Grant High-T C : The IBM Almaden Story February, 1988 Record High Superconductivity! Tl K Tl K (only) …but, very robust H irr !

Paul M. Grant High-T C : The IBM Almaden Story January, 1989 Pr-123: Why Not? Pr 3+ or Pr 4+ ?

Paul M. Grant High-T C : The IBM Almaden Story The Future 2028