English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Phonon-drag effect in FeGa3

Wagner, M., Kasinathan, D., Schnelle, W., Cardoso-Gil, R., Rosner, H., Grin, Y., et al. (2014). Phonon-drag effect in FeGa3. Physical Review B, 90(19): 195206, pp. 1-11. doi:10.1103/PhysRevB.90.195206.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BF8F-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F970-9
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Wagner, M.1, Author              
Kasinathan, Deepa2, Author              
Schnelle, Walter3, Author              
Cardoso-Gil, Raul4, Author              
Rosner, Helge5, Author              
Grin, Yuri6, Author              
Gille, P.7, Author
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
4Raul Cardoso, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863420              
5Helge Rosner, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863450              
6Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              
7External Organizations, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: The thermoelectric properties of single-crystalline and polycrystalline FeGa 3 are systematically investigated over a wide temperature range. At low temperatures, below 20 K, previously not known pronounced peaks in the thermal conductivity (400-800WK -1 m -1) with corresponding maxima in the thermopower (in the order of -16000muV K -1) were found in single-crystalline samples. Measurements in single crystals along [100] and [001] directions indicate only a slight anisotropy in both the electrical and thermal transports. From susceptibility and heat-capacity measurements, a magnetic or structural phase transition was excluded. Using density functional theory based calculations, we have revisited the electronic structure of FeGa 3 and compared the magnetic (including correlations) and nonmagnetic electronic densities of states. Thermopower at fixed carrier concentrations is calculated using semiclassical Boltzmann transport theory, and the calculated results match fairly with our experimental data. The inclusion of strong electron correlations treated in a mean field manner (by LSDA + U) does not improve this comparison, rendering strong correlations as the sole explanation for the low-temperature enhancement unlikely. Eventually, after a careful review, we assign the peaks in the thermopower as a manifestation of the phonon-drag effect, which is supported by thermopower measurements in a magnetic field.

Details

show
hide
Language(s): eng - English
 Dates: 2014-11-25
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 14754338
DOI: 10.1103/PhysRevB.90.195206
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 90 (19) Sequence Number: 195206 Start / End Page: 1 - 11 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008