Presentation is loading. Please wait.

Presentation is loading. Please wait.

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

Similar presentations


Presentation on theme: "Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 Paul M. Grant."— Presentation transcript:

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

2 High-T C : The IBM Almaden Story 1986 - 1990 Models of Electrical Conductivity e-e- Resistance  Temperature 

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

4 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 Physics of Superconductivity ++ ++ e-e- e-e- Electrons Pair Off! T R TCTC

5 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 1986: The Discovery of High-Tc! La 1-x Ba x CuO 4+ 

6 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 November 25, 1986 Houston

7 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 January 30, 1987 Alabama Houston

8 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 It’s “1-2-3!”

9 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 Oxygen is the Key

10 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 (Almost) All REs Work! JACS, April, 1987

11 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 Woodstock, NYC, 1987 Physicists’ Night Out!

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

13 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 1987: The Prize!

14 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 February, 1988 Record High Superconductivity! Tl-2223 125 K Tl-1223 110 K (only) …but, very robust H irr !

15 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 January, 1989 Pr-123: Why Not? Pr 3+ or Pr 4+ ?

16 Paul M. Grant High-T C : The IBM Almaden Story 1986 - 1990 The Future 2028


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

Similar presentations


Ads by Google