English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

CrN-based alloy thin films are of interest as thermoelectric materials forenergy harvesting. Ab initio calculations show that dilute alloying of CrN with3 at.% W substituting Cr, induce flat electronic bands and push the Fermi levelEF into the conduction band, while retaining dispersive Cr 3d bands. Thesefeatures are conducive for both high electrical conductivity \sigma and highSeebeck coefficient \alpha, and hence the thermoelectric power factor{\alpha}^2\sigma. To investigate this possibility, epitaxial CrWxNz films weregrown on c-plane sapphire by dc-magnetron sputtering. However, even films withthe lowest W concentration (x = 0.03) in our study contained metallic h-Cr2N,which is not conducive for a high \alpha. Nevertheless, the films exhibit asizeable power factor of {\alpha}^2\sigma ~ 4.7 x 10-4 Wm-1K-2 due to high\sigma ~ 700 Scm-1, and a moderate \alpha ~ -25 ~{^^^^00b5}V/K. Increasingh-Cr2N fractions in the 0.03 < x \le 0.19 range monotonically increases \sigma,but severely diminishes \alpha leading to two orders of magnitude decrease in{\alpha}^2\sigma. This trend continues with x > 0.19 due to W precipitation.These findings indicate that dilute W additions below its solubility limit inCrN is important for realizing high thermoelectric power factor in CrWxNz alloyfilms.

Effects of W alloying on the electronic structure, phase stability and thermoelectric power factor in epitaxial CrN thin films