Open AccessThermomagnetic properties of Bi 2 Te 3
Author(s) -
Md Sabbir Akhanda,
S. Emad Rezaei,
Keivan Esfarjani,
Sergiy Krylyuk,
Albert V. Davydov,
Mona Zebarjadi
Publication year - 2021
Publication title -
physical review materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.439
H-Index - 42
eISSN - 2476-0455
pISSN - 2475-9953
DOI - 10.1103/physrevmaterials.5.015403
Subject(s) - nernst equation , seebeck coefficient , nernst effect , materials science , condensed matter physics , atmospheric temperature range , thermodynamics , magnetoresistance , magnetic field , physics , thermoelectric effect , quantum mechanics , electrode
Magneto-thermoelectric transport provides an understanding of coupled electron-hole-phonon current in topological materials and has applications in energy conversion and cooling. In this work, we study the Nernst coefficient, the magneto-Seebeck coefficient, and the magnetoresistance of single-crystalline Bi2Te3 under external magnetic field in the range of -3 T to 3 T and in the temperature range of 55 K to 380 K. Moreau's relation is employed to justify both the overall trend of the Nernst coefficient and the temperature at which the Nernst coefficient changes sign. We observe a non-linear relationship between the Nernst coefficient and the applied magnetic field in the temperature range of 55 K to 255 K. An increase in both the Nernst coefficient and the magneto-Seebeck coefficient is observed as the temperature is reduced which can be attributed to the increased mobility of the carriers at lower temperatures. First-principles density functional theory calculations were carried out to physically model the experimental data including electronic and transport properties. Simulation findings agreed with the experiments and provide a theoretical insight to justify the measurements.