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--- Timezone: CET
Creation date: 2021-03-04
Creation time: 20-24-16
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4
article
CP2S022
Comprehensive Study of the Low-Temperature Transport and Thermodynamic Properties of the Cluster Compounds AgxMo9Se11 (3.41 ? x ? 3.78)
Chemistry of Materials
2014
26
16
4765-4775
We present a detailed study of the evolution of the electrical, galvanomagnetic, and thermodynamic properties of polycrystalline AgxMo9Se11 compounds for 3.4 ? x ? 3.8 at low temperatures (2?350 K). In agreement with density functional theory calculations, the collected data show an overall gradual variation in the transport properties from metallic to semiconducting behavior on going from x = 3.4 to 3.8. The results evidence subtle variations in the electronic properties with the Ag content, typified by both positive and negative phonon-drag effects together with thermopower and Hall coefficient of opposite signs. Analysis of the data suggests that these features may be due to peculiarities of the dispersion of the valence bands in the vicinity of the chemical potential. A drastic influence of the Ag content on the thermal transport was evidenced by a pronounced change in the temperature dependence of the specific heat below 10 K. Nonlinearities in the Cp(T3) data are correlated to the concentration of Ag atoms, with an increase in x resulting in a more pronounced departure from a Debye law. The observed behavior mirrors that of ionic conductors, suggesting that AgxMo9Se11 for x ? 3.6 might belong to this class of compounds.
Département CP2S : Chimie et électrochimie des matériaux
T.ZHOU
M.COLIN
C.CANDOLFI
C.Boulanger
A.DAUSCHER
E.Santava
J.HEJTMANEK
P.BARANEK
R.AL RAHAL AL ORABI
M.POTEL
B.Fontaine
P.GOUGEON
R.Gautier
B.LENOIR
article
CP2S004
Design of a real-time spectroscopic rotating compensator ellipsometer without systematic errors
Thin Solid Films
2014
571, Part 3
509-512
Abstract We describe a spectroscopic ellipsometer in the visible domain (400–800 nm) based on a rotating compensator technology using two detectors. The classical analyzer is replaced by a fixed Rochon birefringent beamsplitter which splits the incidence light wave into two perpendicularly polarized waves, one oriented at + 45° and the other one at ? 45° according to the plane of incidence. Both emergent optical signals are analyzed by two identical CCD detectors which are synchronized by an optical encoder fixed on the shaft of the step-by-step motor of the compensator. The final spectrum is the result of the two averaged ? and ? spectra acquired by both detectors. We show that ? and ? spectra are acquired without systematic errors on a spectral range fixed from 400 to 800 nm. The acquisition time can be adjusted down to 25 ms. The setup was validated by monitoring the first steps of bismuth telluride film electrocrystallization. The results exhibit that induced experimental growth parameters, such as film thickness and volumic fraction of deposited material can be extracted with a better trueness.
Département CP2S : Chimie et électrochimie des matériaux
Systematic errors In-situ ellipsometry Electrodeposition Bismuth telluride
LaurentBroch
NicolasStein
AlexandreZimmer
YannBattie
Aotmane EnNaciri
article
Schleicher2014
Localized states in advanced dielectrics from the vantage of spin-and symmetry-polarized tunnelling across MgO
Nature Communications
2014
5
Département P2M : Nanomagnétisme et Electronique de Spin
http://www.scopus.com/inward/record.url?eid=2-s2.0-84905482337&partnerID=40&md5=4ccbc88e193e7e394072da0990df284a
F.Schleicher
U.Halisdemir
D.Lacour
M.Gallart
S.Boukari
G.Schmerber
V.Davesne
P.Panissod
D.Halley
H.Majjad
Y.Henry
B.Leconte
A.Boulard
D.Spor
N.Beyer
C.Kieber
E.Sternitzky
O.Cregut
M.Ziegler
F.Montaigne
E.Beaurepaire
P.Gilliot
M.Hehn
M.Bowen
article
ISI:000336759100005
Structural paradox in submonolayer chlorine coverage on Au(111)
PHYSICAL REVIEW B
2014
89
19
Département P2M : Surfaces et Spectroscopies
1098-0121
10.1103/PhysRevB.89.195425
V. V.Zheltov
V. V.Cherkez
B. V.Andryushechkin
G. M.Zhidomirov
B.Kierren
Y.Fagot-Revurat
D.Malterre
K. N.Eltsov