Photon-Mediated Thermoelectric and Heat Currents through a Resonant Quantum Wire-Cavity System

• Published in: Energies
• Main Authors: Abdullah, Nzar, Marif, Rawezh Bakr, Rashid, Hunar Omar
• Other Authors: Raunvísindastofnun (HÍ), Science Institute (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), Háskóli Íslands, University of Iceland
• Format: Article in Journal/Newspaper
• Language: English
• Published: MDPI AG 2019
• Subjects: Electro-optical effects; Energy harvesting; Quantum wires; Thermal transport; Skammtafræði; Skammtaljósfræði; Iceland
• Online Access: https://hdl.handle.net/20.500.11815/2055; https://doi.org/10.3390/en12061082

Publisher's version (útgefin grein) We theoretically consider a short quantum wire, which on both ends is connected to leads that have different temperatures. The quantum wire is assumed to be coupled to a cavity with a single-photon mode. We calculate the heat and thermoelectric currents in the quantum wire under the effect of the photon field. In the absence of the photon field, a plateau in the thermoelectric current is observed due to the thermal smearing at a high temperature gradient. In the presence of the resonance photon field, when the energy spacing between the lowest states of the quantum wire is approximately equal to the photon energy, a suppression in thermoelectric current and negativity in the heat current are seen due to the dressed electron-photon states. It is also found that the cavity with high photon energy has more influence on the thermoelectric current at a high temperature gradient. This work was financially supported by the Research Fund of the University of Iceland, the Icelandic Research Fund, Grant No. 163082-051, and the Icelandic Infrastructure Fund. The fund was awarded to Vidar Gudmundsson from Iceland University. Peer Reviewed