FIELD: electricity.
SUBSTANCE: proposed method of measurement ∂μ/∂T, which is a measure ∂S/∂n in the two-dimensional systems with variable density n. The invention uses the structure of the temperature modulation is made on the sample surface, and electrically equivalent to a plane capacitor, one of whose plates is an investigational agent, and subsequent measurement of the emerging recharge current structure. The structure (sample) is placed on the screening external electric field and the heat conducting container, providing the temperature uniformity of the sample area. If the test substance is a two-dimensional system with a tunable carrier concentration, the result of an additional measurement is to determine the entropy of the system.
EFFECT: improved accuracy and reliability of the measurement of the chemical potential and entropy.
7 cl, 3 dwg
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