Corpus ID: 210860818

Characterization of electron and phonon transports in Bi-doped CaMnO3 for thermoelectric applications.

  title={Characterization of electron and phonon transports in Bi-doped CaMnO3 for thermoelectric applications.},
  author={E. Suprayoga and W. Putri and K. Singsoog and S. Paengson and M. Y. Hanna and A. R. T. Nugraha and D. R. Munazat and B. Kurniawan and M. Nurhuda and T. Seetawan and E. H. Hasdeo},
  journal={arXiv: Mesoscale and Nanoscale Physics},
Electron and phonon transports in CaMnO3 and its Bi-doped counterpart, Bi0.03Ca0.97MnO3, are investigated by thermoelectric transport measurements, Raman spectroscopy, and first-principles calculations. In particular, we focus on CaMnO3 and Bi0.03Ca0.97MnO3's electronic structures, temperature-dependent electron and phonon lifetimes, and their sound velocities. We find that the anti-ferromagnetic insulator CaMnO3 breaks the Wiedemann-Franz (WF) law with the Lorenz number reaching four times… Expand

Figures from this paper


On the origin of vibrational properties of calcium manganate based thermoelectric compounds
Abstract Vibrational properties of CaO(CaMnO3)m (m = 1, 2, 3, and ∞) thermoelectric (TE) oxides for high-temperature energy conversion applications are studied both experimentally andExpand
Structural, electronic and thermoelectric behaviour of CaMnO3 and CaMnO(3−δ)
First principle calculations were employed to investigate the orthorhombic perovskite CaMnO3 and the impact of reduced oxygen content on the electronic, structural and thermoelectric properties. OnExpand
Bulk modulus and thermodynamic properties of electron-doped calcium manganate—Ca1―xRExMnO3
Abstract We have investigated the thermodynamic properties of electron-doped perovskite manganite CaMnO 3 by incorporating the effect of lattice distortions. In this paper the functional relationExpand
Ultra-high Seebeck coefficient and low thermal conductivity of a centimeter-sized perovskite single crystal acquired by a modified fast growth method
A centimeter-sized organic–inorganic hybrid lead-based perovskite CH3NH3PbI3 (MAPbI3) single crystal was obtained by using a modified fast and inverse-temperature growth method. The opticalExpand
Improvement in thermoelectric properties of CaMnO3 by Bi doping and hot pressing
Abstract The polycrystalline of Ca 1-x Bi x MnO 3 (x = 0, 0.01, 0.02, 0.03, 0.04 and 0.05) thermoelectric materials were prepared by solid state reaction (SSR) and hot pressing (HP) methods. TheExpand
Ab initio study of electron-phonon interaction in phosphorene
The monolayer of black phosphorous, or phosphorene, has recently emerged as a new 2D semiconductor with intriguing highly anisotropic transport properties. Existing calculations of its intrinsicExpand
Raman spectroscopy of orthorhombic perovskitelike YMnO_{3} and LaMnO_{3}
The Raman-active phonons in orthorhombic perovskitelike YMnO3 and LaMnO3 were studied by measuring Raman spectra in various scattering configurations. The experimental Raman line wave numbers and theExpand
Perspectives on thermoelectrics: from fundamentals to device applications
This review is an update of a previous review (A. J. Minnich, et al., Energy Environ. Sci., 2009, 2, 466) published two years ago by some of the co-authors, focusing on progress made inExpand
Strain-controlled oxygen vacancy formation and ordering in CaMnO3
We use first-principles calculations to investigate the stability of biaxially strained Pnma perovskite CaMnO${}_{3}$ towards the formation of oxygen vacancies. Our motivation is provided byExpand
Violation of the Wiedemann-Franz Law in Hydrodynamic Electron Liquids.
It is shown that at low temperature 1/τ(th)(ee) is 8/5 of the quasiparticle decay rate; remarkably, the same result is found in doped graphene and in conventional electron liquids in parabolic bands. Expand