Giant Thermoelectric Effect Research Articles

Giant Thermoelectric Effect from Transmission Supernodes

We predict an enormous order-dependent quantum enhancement of thermoelectric effects in the vicinity of higher-order interferences in the transmission spectrum of a nanoscale junction. Single-molecule junctions based on 3,3'-biphenyl and polyphenyl ether (PPE) are investigated in detail. The nonequilibrium thermodynamic efficiency and power output of a thermoelectric heat engine based on a 1,3-benzene junction are calculated using many-body theory and compared to the predictions of the figure-of-merit ZT.

Giant thermoelectric effect in graphene

The paper predicts a giant thermoelectric coefficient in a nanostructure consisting of metallic electrodes periodically patterned over graphene, which is deposited on a silicon dioxide substrate. The Seebeck coefficient in this device attains 30mV∕K, this value being among the largest reported ever. The calculations are based on a transfer matrix approach that takes a particular form for graphene-based devices. The results are important for future nanogenerators with applications in the area of sensors, energy harvesting, and scavenging.

Modeling of rf energy sensing and harvesting using the giant thermoelectric effect in carbon nanotubes

The paper presents the modeling of rf energy sensing and harvesting using the giant thermoelectric effect encountered in carbon nanotubes and proposes a harvester based on this principle. The rf energy is transformed into dc voltage, conferring to the harvesting device the property of self-powering and thus the portability, which is a prerequisite of ultradense wireless nodes that form advanced wireless sensor networks and, in principle, of any portable wireless device.

To the giant transverse thermoelectric effect in HTSC materials

The transverse thermoelectric effect in HTSC films was analyzed theoretically concerning a plausible anisotropic electron-band structure which was supposed to be weakly binding in Cu  O layers and tightly binding in the directions close to the c-axis. We have found interesting peculiarities in the effect value as a function of the Fermi energy in the vicinity of the points which correspond to the boundaries of Brillouin zones along the c-axis direction. At the first-zone boundary the effect is 5 times greater than its initial value. Then, if many zones are taken into account, it demonstrates a nonmonotone behavior strongly depending on the band parameters (energy band widths and gaps) with a possible change in the sign of the effect.