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@ARTICLE{Cagnoni:867954,
author = {Cagnoni, Matteo and Führen, Daniel and Wuttig, Matthias},
title = {{T}hermoelectric {P}erformance of {IV}-{VI} {C}ompounds
with {O}ctahedral-{L}ike {C}oordination: {A}
{C}hemical-{B}onding {P}erspective},
journal = {Advanced materials},
volume = {30},
number = {33},
issn = {0935-9648},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2019-06547},
pages = {1801787 -},
year = {2018},
abstract = {Thermoelectric materials provide a challenge for materials
design, since they require optimization of apparently
conflicting properties. The resulting complexity has favored
trial‐and‐error approaches over the development of
simple and predictive design rules. In this work, the
thermoelectric performance of IV–VI chalcogenides on the
tie line between GeSe and GeTe is investigated. From a
combination of optical reflectivity and electrical transport
measurements, it is experimentally proved that the
outstanding performance of IV–VI compounds with
octahedral‐like coordination is due to the anisotropy of
the effective mass tensor of the relevant charge carriers.
Such an anisotropy enables the simultaneous realization of
high Seebeck coefficients, due to a large
density‐of‐states effective mass, and high electrical
conductivity, caused by a small conductivity effective mass.
This behavior is associated to a unique bonding mechanism by
means of a tight‐binding model, which relates band
structure and bond energies; tuning the latter enables
tailoring of the effective mass tensor. The model thus
provides atomistic design rules for thermoelectric
chalcogenides.},
cin = {PGI-10},
ddc = {660},
cid = {I:(DE-Juel1)PGI-10-20170113},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29975431},
UT = {WOS:000441411500020},
doi = {10.1002/adma.201801787},
url = {https://juser.fz-juelich.de/record/867954},
}