4 votes
Accepted

What was the historical importance of the discovery of high-$T_c$ superconductors?

This is what I recall... (I was a high school kid at the time) There are two aspects. First the new ceramic high Tc superconductors could be cooled with liquid nitrogen - this is much cheaper and ...
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  • 2,048
2 votes

Why is the thermoelectric figure of merit denoted by $ZT$?

My guess for the Z From THIS Germain-English dictionary, we see that "Figure of merit" in German could be Gütezahl $\qquad$ or $\qquad$ Leistungskennzahl in electrical engineering. So probably ...
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  • 8,625
2 votes

Why is the thermoelectric figure of merit denoted by $ZT$?

The concept of the thermoelectric figure of merit and the abbreviation ZT were introduced by the Russian physicist Abram Fedorovich Ioffe in 1949, so I assume the acronym originates from Russian. ...
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