2024-03-28T08:53:19Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/146822022-11-17T02:08:08Zhdl_2115_20053hdl_2115_145Thermoelectric figure of merit of Bi/Pb_{1-x}Eu_{x}Te superlatticesKoga, T.Rabin, O.Dresselhaus, M. S.549.8An enhanced thermoelectric figure of merit Z_{3D}T is predicted for Bi/(111)Pb_{1-x}Eu_{x}Te superlattices. The values of Z_{3D}T obtained for x≈1 superlattices are 2.31, 1.55, and 1.61 at 300, 150, and 77 K, respectively, showing that they are promising candidates for thermoelectric elements in the temperature range 77–300 K. Even with x as small as 0.1, where the conduction-band offset ΔE_{c} is estimated to be 0.25 eV, the predicted Z_{3D}T values are 1.75, 1.16, and 1.18 at 300, 150, and 77 K, respectively. It is proposed that other families of Bi-based superlattices, such as Bi/(111)CdTe superlattices, should also be good candidates for low-temperature thermoelectric elements.American Physical SocietyJournal Articleapplication/pdfhttp://hdl.handle.net/2115/14682https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/14682/1/PRB62.pdf0163-18291095-3795Physical Review B622416703167062000-12enginfo:doi/10.1103/PhysRevB.62.16703Copyright © 2000 American Physical Societypublisher