\"Nobel Prize in Physics\" Leo Esaki Signed FDC Dated 1960 For Sale
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\"Nobel Prize in Physics\" Leo Esaki Signed FDC Dated 1960:
$489.99
Up for sale the "Nobel Prize in Physics" Leo Esaki Hand Signed First Day Cover Dated 1960.
a Japanese physicist who shared the Nobel Prize in Physics in
1973 with Ivar Giaever and Brian David Josephson for
his work in electron tunneling in
semiconductor materials which finally led to his invention of the Esaki diode, which exploited that phenomenon. This research
was done when he was with Tokyo Tsushin Kogyo (now known as Sony).
He has also contributed in being a pioneer of the semiconductor superlattices. Esaki was born in Prefecture (now
part of Higashiōsaka City) and
grew up in Kyoto, near by Kyoto Imperial University and Doshisha University. He
first had contact with Christianity and American culture in Doshisha Junior High School [ja]. After graduating from
the Third Higher School, he
studied physics at Tokyo Imperial University,
where he had attended Hideki Yukawa's course
in nuclear theory in
October 1944. Also, he lived through the Bombing of Tokyo while he was at college. Esaki
received his B.Sc. and Ph.D. in 1947 and 1959, respectively, from the University of Tokyo (UTokyo).
From 1947 to 1960, Esaki joined Kawanishi Corporation (now Fujitsu Ten) and Tokyo Tsushin Kogyo (now Sony).
Meanwhile, American physicists John Bardeen, Walter Brattain, and William Shockley invented the transistor, which encouraged Esaki to change fields from vacuum in Sony. One year later, he recognized
that when the PN junction width of germanium is thinned, the current-voltage
characteristic is dominated by the influence of the tunnel effect and, as a
result, he discovered that as the voltage is increased, the current decreases
inversely, indicating negative resistance. This discovery was the first
demonstration of solid tunneling effects in physics, and it was the birth of
new electronic devices in electronics called Esaki diode (or tunnel diode). He received a doctorate
degree from UTokyo due to this breakthrough invention in 1959. In 1973, Esaki
was awarded the Nobel Prize for research conducted around 1958 regarding
electron tunneling[4] in solids. He became the first Nobel laureate to receive the prize from the hands of the
King Carl XVI Gustaf.
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