Four times Boltzmann's constant times temperature (*) times this quantity gives the constant spectral density of Johnson-Nyquist noise.
At low temperature, this quantity decreases when there is an odd number of atoms in a droplet, but stays the same for even number of atoms, due to the alternation of a singlet at the Fermi level with overall spin-zero SETs. A model for this quantity gives it proportional to the sum of temperature squared, temperature to the fifth, and the logarithm of one over temperature. One over the temperature is given as a third-order power series of the logarithm of this quantity in the Steinhart-Hart equation. The Anderson model explains why this quantity is minimized at a given temperature due to tunnel-coupling from impurities. Four times Boltzmann's constant times temperature (*) times this quantity gives the constant spectral density of Johnson-Nyquist noise. Bolometers used for measuring radiation use NTDs, because of this quantity's strong temperature dependence. At low temperatures, this quantity will show nonlinearities due to the Kondo effect. For 10 points, name this quantity which drops to zero at low temperatures in superconductors.
At low temperature, this quantity decreases when there is an odd number of atoms in a droplet, but stays the same for even number of atoms, due to the alternation of a singlet at the Fermi level with overall spin-zero SETs.
electrical resistance [or electrical resistivity]