ZhETF, Vol. 119,
p. 409 (February 2001)
(English translation - JETP,
Vol. 92, No. 2,
available online at www.springer.com
PELTIER-EFFECT-INDUCED CORRECTION TO OHMIC RESISTANCE
Received: August 23, 2000
The standard ohmic measurements by means of two extra leads contain an additional thermal correction to resistance. The current results in heating (cooling) at the first (second) sample contact because of the Peltier effect. The contact temperatures are different. The measured voltage is the sum of the ohmic voltage swing and the Peltier-effect-induced thermoelectromotive force that is linear in the current. As a result, the thermal correction to the resistance measured exists as . The correction could be comparable with the ohmic resistance. Above some critical frequency depending on thermal inertial effects, the thermal correction disappears.