Experimental results demonstrating Peltier cooling below 10 K are reported, using crystals of the thermoelectric cerium hexaboride (CeB6). Direct measurements of the Peltier cooling showed δT up to ∼0.2 K in magnitude at T∼4–5 K. All three kinetic parameters: resistivity (ρ), heat conductivity (k), and Seebeck coefficient (S), characterizing the thermoelectric figure of merit ZT=S2T/ρk, were measured, giving high-confidence results.
Harutyunyan S.R., Vardanyan V.H., Kuzanyan A.S., Nikoghosyan V.R., Kunii S., Winzer K., Wood K.S., and Gulian A.M., Thermoelectric cooling at cryogenic temperatures. Appl. Phys. Lett., 2003, vol. 83, No. 11, pp. 2142-2144. https://doi.org/10.1063/1.1610810
American Institute of Physics