Publication
Pressure dependence of the large-polaron transport in anatase TiO2 single crystals
Publications associées (48)
Electrical property measurements of Cr-N codoped TiO2 epitaxial thin films grown by pulsed laser deposition
László Forró, Arnaud Magrez, Richard Gaal, Jacim Jacimovic
The temperature dependent resistivity and thermo-electric power of Cr-N codoped TiO2 were compared with that of single element N and Cr doped and undoped TiO2 using epitaxial anatase thin films grown by pulsed laser deposition on (100) LaAlO3 substrates. T ...
Amer Inst Physics2013Nature of the Charge Carriers and Conduction Mechanism in Anatase TiO2
The anatase phase of TiO2 is a key material in the third generation of photovoltaics and for photo-catalytic devices. The number of promising applications, where one would profit from the electronic degrees of freedom of the material, like in memristors, s ...
EPFL2012Microstructure and thermoelectric properties of bulk and porous n-type silicon-germanium alloy prepared by HUP
The optimization of powders preparation and consolidation process leads to the achievement of a high thermoelectric figure of merit (ZT=1.25 at 800°C) in an n-type silicon-germanium (SiGe) alloy hot pressed at low heating rate. It has been experimentally o ...
2012High-pressure study of transport properties in Co0.33NbS2
László Forró, Helmuth Berger, Jacim Jacimovic, Eduard Tutis, Ofer Yuli, Neven Barisic
This is the first study of the effect of pressure on transition metal dichalcogenides (TMDs) intercalated by atoms that order magnetically. Co0.33NbS2 is a layered system where the intercalated Co atoms order antiferromagnetically at T-N = 26 K at ambient ...
American Physical Society2011Pressure effects on the transport coefficients of Ba(Fe_{1−x}Co_{x})_{2}As_{2}
László Forró, Richard Gaal, Stevan Arsenijevic
We report the temperature dependence of the resistivity and thermoelectric power (TEP) under hydrostatic pressure of the itinerant antiferromagnet BaFe2As2 and the electron-doped superconductor Ba(Fe0.9Co0.1)(2)As-2. We observe a hole-like contribution to ...
2011Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3
László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Richard Gaal, Rita Smajda, Jacim Jacimovic, Zlatko Mickovic, George Cristian Vaju
Cubic ZnMnO3 powder in the form of well-crystalline nanoflakes have been synthesized at low temperatures from a nitrate precursor. The electrical properties of cubic ZuMnO(3) samples have been established by DC resistivity (rho) and thermo-electric power ( ...
Elsevier2011Role of Disorder and Anharmonicity in the Thermal Conductivity of Silicon-Germanium Alloys: A First-Principles Study
Nicola Marzari, Boris Kozinsky
The thermal conductivity of disordered silicon-germanium alloys is computed from density-functional perturbation theory and with relaxation times that include both harmonic and anharmonic scattering terms. We show that this approach yields an excellent agr ...
2011Polaronic Conductivity in the Photoinduced Phase of 1T-TaS2
The transient optical conductivity of photoexcited 1T-TaS2 is determined over a three-order-of-magnitude frequency range. Prompt collapse and recovery of the Mott gap is observed. However, we find important differences between this transient metallic state ...
2011High-pressure study of anatase TiO2
László Forró, Arnaud Magrez, Richard Gaal, Helmuth Berger, Jacim Jacimovic, George Cristian Vaju
We report resistivity and thermo-electric power measurements of the anatase phase of TiO2 under pressure up to 2.3 GPa. Despite its transparent appearance, the single crystal of anatase exhibits a metallic-like resistivity above 60 K, at all pressures. The ...
2010Electrical transport in charge-ordered Fe2OBO3: Resistive switching and pressure effects
The pressure-temperature-electric field phase diagram of Fe2OBO3 is studied under ambient and high pressure using resistivity and thermoelectric power measurements. The onset of the incommensurate charge order at T-CO=340 K does not depend on pressure up t ...
2010