Time-resolved measurement of Seebeck effect for superionic metals during structural phase transition

Abstract

We propose a new time (t)-resolved method of both vertical- and horizontal-temperature gradients in an orthogonal configuration (t-resolved T(t)-HVOT) to have real interpretations of the enhancement in thermoelectric Seebeck effect (SE) observed during the structural phase transition. We apply our new method to superionic-state semiconductors of p-type Cu2Se and n-type Ag2S. The experimental data differentiate the two types of enhancements during the phase transition: a colossal SE (Scolossal), exhibiting an enormous value of up to 5 mV/K, and a slight enhancement in SE (Sstructure), approximately 1.5-2.0 times larger than those in the absence of the phase transition. We provide critical insights that both enhancements in SE arising during the structural phase transition are not intrinsic phenomena.

Published in Phys. Rev. B

References in corpus (11)

• Spin Seebeck insulator
• Spin entropy as the likely source of enhanced thermopower in $\rm\bf Na_xCo_2O_4
• Large, nonsaturating thermopower in a quantizing magnetic field
• Thermopower and Entropy: lessons from Sr${}_2$RuO${}_4$
• Generic Seebeck Effect From Spin Entropy
• Non-equilibrium thermodynamics of the spin Seebeck and spin Peltier effects
• Electronic thermoelectric power factor and metal-insulator transition in FeSb2
• Vacancy defect control of colossal thermopower in FeSb2
• Electronic Origin for the Enhanced Thermoelectric Efficiency of Cu2Se
• Getting back to Na_xCoO_2: spectral and thermoelectric properties
• Quantitative assessment of the universal thermopower in the Hubbard model