Packet 5: Bonus 2

The initial calculation of this effect with perturbation theory resulted in an apparent logarithmic divergence as temperature approached absolute zero. For 10 points each:
[10h] Name this effect that describes electron scattering in a conductor due to magnetic impurities. This effect is responsible for an observed minimum in a property in impure gold wires studied by de Haas.
ANSWER: Kondo effect
[10e] The Kondo effect contributes a logarithmic term to this quantity, contradicting Matthiessen’s rule. This quantity is the reciprocal of conductivity.
ANSWER: electrical resistivity [reject “electrical resistance”]
[10m] The minimum occurs because resistivity is dominated by the Kondo effect at low temperatures, and by this physicist and Grüneisen’s fifth-power law at high temperatures. This physicist described solutions to the Schrödinger equation for a periodic potential.
ANSWER: Felix Bloch
<Indiana, Physics> | E. Prelims 5 - Indiana + Vanderbilt + MIT

HeardPPBE %M %H %
2111.9076%38%5%

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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
British ColumbiaRutgers0101020EM
Chicago BStanford A0101020EM
Columbia AVirginia010010E
GeorgetownChicago A0000
Georgia Tech CToronto B10101030HEM
HarvardTexas0101020EM
Illinois BMichigan010010E
Johns HopkinsUC Berkeley B0101020EM
Maryland BGeorgia Tech B0000
MinnesotaToronto A0000
NYU AIllinois A0000
NYU BCornell010010E
North CarolinaCambridge010010E
Northwestern ABruin0101020EM
Ohio StateGeorgia Tech A0101020EM
PittsburghColumbia B010010E
PurduePenn State0000
Stanford BBrown010010E
UCFUC Berkeley A010010E
Virginia TechUCLA010010E
WaterlooMaryland A0101020EM

Summary

TournamentEditionMatchHeardPPBE %M %H %
Main Site2026-04-17✓2111.9076%38%5%