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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 101 až 120 z 181
Netrvalová, Marie , Novák, Petr , Šutta, Pavol , Medlín, Rostislav
Vyšetřování optických vlastností tenké vrstvy terární sloučeniny Zn-Ti-O připraveného magnetronovým reaktivním konaprašováním

Zn-Ti-O thin films with different concentrations of titanium were deposited by reactive magnetron co-sputtering in a reactive Ar/O2 atmosphere from zinc and titanium targets. It was found that with increasing Ti content the structure of the films gradually changes from a fully crys...

Vobecká, Lucie , Khafizova, Elvira , Stragier, Thomas , Slouka, Zdeněk , Přibyl, Michal
Adresování kapek ATPS v mikrofluidních čipech pomocí elektrického pole

The possibility of controlled droplet motion (droplet addressing) mediated by DC electric field in aqueous two-phase systems (ATPS) is here reported for the first time. Three ATPS of polyethylene glycol (PEG)/salt type, namely PEG/phosphate, EG/sulphate, and PEG/carbonate, were selected...

Nistor, Andra , Vonka, Michal , Rygl, Adam , Voclova, Malvina , Minichova, Maria , Kosek, Juraj
Mikrostrukturované polystyrenové pěny utvářené tepelně indukovanou fázovou separací z roztoku cyklohexanonu

The thermally induced phase separation can be used to prepare materials of various microstructured morphologies that define their applications. In this work, foams formed from a polystyrene-cyclohexanol solution are prepared, characterized, and modeled. To obtain a reliable thermodynamic description, ...

Al-Jaary, Ali H. Reshak
Odhalování transportních vlastností spin-polarizované b0-Tb2(MoO4)3: DFT+U

The thermoelectric properties of the spin-polarized b0-Tb2(MoO4)3 phase are calculated using first-principles and second-principles methods to solve the semi-classical Bloch-Boltzmann transport equations. It is interesting to highlight that the calculated electronic band structure reveals that the b0-Tb2(MoO4)3 ...

Al-Jaary, Ali H. Reshak
CaCoSO zředěný magnetický antiferromagnetový polovodič jako účinný termoelektrický materiál

We have reported the thermoelectric properties of the recently synthesized CaCoSO single crystal by Salter et al. in 2016. It is quite interesting to mention that CaCoSO single crystals exhibit a direct energy gap (Gv- Gc) of about 2.187 eV for the spin-up (") channel,&#x...

Tesař, Tomáš , Mušálek, Radek , Medricky, Jan , Kotlan, Jiri , Lukáč, František , Pala, Zdeněk , Ctibor, Pavel , Chráska, Tomáš , Houdková Šimůnková, Šárka , Římal, Václav , Curry, Nicholas
Vývoj Al2O3 povlaků deponovaných pomocí suspenzního plazmového nástřiku s využitím plazmového hořáku s vysokou entalpií

Deposition of aluminium oxide (Al2O3) coatings from liquid feedstocks using a high enthalpy hybrid water stabilized plasma torch was investigated. The entire process included the optimization of spraying parameters using a commercial ready to spray suspension, optimization and deposition of custo...

Šesták, Jaroslav
Holbův a Korzhinského přístup k supervolné energii, která je efektivní v trmodynamickém popisu částečně otevřených pevnofázových systémů nestochiometrických oxidů

Founding and determination of thermodynamic functions related to solid often geologic materials is traced showing interactions between Czech Professor F. Wald and Russian N.S. Kurnakov and D.S. Kozhinskiĭ in the early definition of phases and characterization of partly open systems. Development&#...

Offiah, Solomon U. , Agbo, Solomon N. , Šutta, Pavol , Mâaza, Malik , Ugwuoke, Paulinus E. , Osuji, Rose U. , Ezema, Fabian I.
Studium vnějších vlastností ZnO:Al narostlého technikou SILAR

Aluminum-doped ZnO thin films with pebble-like structures have been successfully deposited on glass substrates by successive ionic layer adsorption reaction method. The effect of percentage composition of the aluminum dopants on the flower-like clusters of the ZnO nanostructures on the structure,...

Moskal, Denys , Martan, Jiří , Lang, Vladislav , Švantner, Michal
Stamp metoda pro zpracování dat s vysokým podílem šumu z infračerveného senzoru v drsném prostředí

This article presents a new digital method, called Stamp method, for elimination of undesired noisedata from a periodic IR signal. The Stamp method is a useful tool for statistical analysis of changes which appear in a noised input signal. One stamp is a statistical image ...

Niklaus, Robin , Minár, Jan , Häusler, Jonas , Schnick, Wolfgang
Charakterizácia elektrónovej štruktúry CaGaSiN3 a CaAlSiN3 s prvých princípov a experimentov: vplyv chemického neusporiadania

We report a detailed investigation of the electronic, mechanical and optical properties of the recently discovered nitridogallosilicate CaGaSiN3 which has potential as a LED-phosphor host material. We focus on chemical disorder effects, originating from the Ga/Si site, and compared them to&#...

Minár, Jan , Ebert, Hubert , Chioncel, Liviu
Self-konsistentná, relativistická implementácia LSDA+DMFT metódy

In this review we report on developments and various applications of the combined Density Functional and Dynamical Mean-Field Theory, the so-called LSDA + DMFT method, as implemented within the fully relativistic KKR (Korringa-Kohn-Rostoker) band structure method. The KKR uses a description ...

Sánchez-Barriga, Jaime , Battiato, Marco , Krivenkov, M. , Golias, Evangelos , Varykhalov, Andrei Yu , Romualdi, A. , Yashina, Lada V. , Minár, Jan , Kornilov, Oleg , Ebert, Hubert , Held, Karsten , Braun, Jürgen
Subpikosekundová dynamika vybudeného stavu v topologickom izolátore: BiľTeš

Using time-, spin-, and angle-resolved photoemission, we investigate the ultrafast spin dynamics of hot electrons on the surface of the topological insulator Bi2 Te3 following optical excitation by femtosecond-infrared pulses. We observe two surface-resonance states above the Fermi level coexisting&#x...

Fanciulli, Mauro , Volfová, Henrieta , Muff, Stefan , Braun, Jürgen , Ebert, Hubert , Minár, Jan , Heinzmann, Ulrich , Dil, Jan Hugo
Spinová polarizácia a attosekudové časové meškanie vo fotoemisii spinovo degenerovaného stavu v tuhej látke

After photon absorption, electrons from a dispersive band of a solid require a finite time in the photoemission process before being photoemitted as free particles, in line with recent attosecond-resolved photoemission experiments. According to the Eisenbud-Wigner-Smith model, the time delay is&#...

Schaefer, Erik D. , Borek, Stephan , Braun, Jürgen , Minár, Jan , Ebert, Hubert , Medjanik, Katerina , Kutnyakhov, Dmytro , Schönhense, Gerd , Elmers, Hans-Joachim
Detekcia vektora spinovej polarizácie vo viackanálovej spinovo rozlýšenej fotoemissie za použitia spinového filtra založeného na Ir(001)

We report on spin- and angular-resolved photoemission spectroscopy using a high-resolution imaging spin filter based on a large Ir(001) crystal enhancing the effective figure of merit for spin detection by a factor of over 103 compared to standard single-channel detectors. Furthermore, we&#x...

Chadova, Kristina , Mankovsky, Sergiy , Minár, Jan , Ebert, Hubert
Vplyv konečnej teploty na vodivostné vlastnosti Gd s prvých princípov

Finite-temperature effects have a pronounced impact on the transport properties of solids. In magnetic systems, besides the scattering of conduction electrons by impurities and phonons, an additional scattering source coming from the magnetic degrees of freedom must be taken into account. A&...

Vostřák, Marek , Tesař, Jiří , Houdková Šimůnková, Šárka , Smazalová, Eva , Hruška, Matěj
Diagnostika procesu laserového přetavení HVOF povlaku Stellitu pomocí infračervené kamery

Thermally sprayed coatings can be remelted to improve their microstructure and functional properties. Among other remelting technologies, laser remelting has the advantage of precise control of the remelting process by suitably chosen parameters. It enables the remelting of thewhole thickness of&...

Datzer, Christian , Zumbülte, Anna , Braun, Jürgen , Förster, Tobias , Schmidt, Anke B. , Mi, Jianli , Iversen, Bo Brummerstedt , Hofmann, Philip , Minár, Jan , Ebert, Hubert , Krüger, Peter , Rohlfing, Michael , Donath, Markus
Štúdium neobsadených statvov a ich spinovej textúry v Bi2Se3

The optical control of spin currents in topological surface states opens new perspectives in (opto-) spintronics. To understand these processes, a profound knowledge about the dispersion and the spin polarization of both the occupied and the unoccupied electronic states is required. We ...

Ali, Shabir , Khan, Wilayat , Murtaza, Ghulam M. , Yaseen, Maria , Ramay, Shahid Mahmood , Mahmood, Asif A.
Studium prvních principů magnetických a elektronických vlastností A2BB'O6 (A = Ba, Sr) (BB0 = FeRe, MnMo a MnRe) dvojité perovskity

Full-potential linearized augmented plane wave (FP-LAPW) method is applied to calculate the structural, electronic and magnetic properties of A2BB0O6 (A = Ba, Sr) and (BB0 = FeRe, MnMo, and MnRe). The structural properties in cubic phase are studied at optimized volume. Electronic band&...

Khan, Wilayat , Goumri-Said, Souraya
Magnetické a elektronické vlastnosti Neptuniumchalkogenů z GGA + U + SOC a DFT přístup

First-principles calculations techniques were employed to explore the structural, electronic and magnetic properties of Neptunium chalcogenides (Np2X5, X = S, Se and Te). No experimental or theoretical studies of their physical properties have been previously reported in the literature. The prese...

Al-Jaary, Ali H. Reshak , Auluck, Sushil
Fotokatalytická přeměna sluneční energie na vodík dělením vody: Nový LiMoO3 (IO3) molybdenyljodát na bázi WO3

The electronic structure of the novel molybdenyl iodate LiMoO3 (IO3) based on WO3-type sheets is calculated in order to understand to its usage as a photocatalyst. Using X-ray diffraction data as the initial input, we have optimized the atomic positions by minimizing the force ...

Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 101 až 120 z 181