Transverse Peltier effect in tilted Pb-Bi2Te3 multilayer structures

A transverse Peltier effect has been observed in artificially created tilted Pb-Bi2Te3 multilayer structures. Multilayer stacks consisting of alternating layers of Pb and n-type Bi2Te3 have been prepared by a heating procedure and showed large thermoelectric anisotropy up to Delta S congruent to 200 mu V/K, depending on thickness ratio p=d(BiTe)/d(Pb), where d(BiTe) and d(Pb) are the thicknesses of Bi2Te3 and Pb layers, respectively. Tilted samples were obtained by cutting stacks obliquely to the stack axis. Due to large Delta S and large electrical but small heat conductivity, samples showed temperature differences transverse to applied currents up to 22 K.