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We report first-principles calculations of zinc-blende half-metals, identifying systems for epitaxial growth with semiconductors, and present calculations for CrAs/GaAs multilayers. We find that half-metallicity is conserved troughout the…

材料科学 · 物理学 2007-05-23 Ph. Mavropoulos , I. Galanakis , P. H. Dederichs

Magnetic semiconductors are at the core of recent spintronics research endeavors. Chemically doped II-VI diluted magnetic semiconductors, such as (Zn$_{1-x}$Cr$_{x}$)Te, provide promising platform in this quest. However, a detailed…

材料科学 · 物理学 2023-03-20 J. Guo , A. Sarikhani , P. Ghosh , T. Heitmann , Y. S. Hor , D. K. Singh

The evolution of a continuous Fe(NO3)3 catalyst film was observed by in-situ annealing in a Transmission Electron Microscope (TEM). Such catalysts are routinely used in the catalytic growth of carbon nanotubes. The experiments reveal that…

材料科学 · 物理学 2015-07-20 Christian Klinke , Jean-Marc Bonard , Klaus Kern

High radiation hardness, chemical resistance, high temperature operation capabilities stimulate a growing interest to use diamond materials as detectors of ionizing radiation. Samples of CVD-diamond materials in sizes 12 square mm and 4…

仪器与探测器 · 物理学 2007-05-23 S. V. Akulinichev , V. S. Klenov , L. V. Kravchuk , S. G. Lebedev , A. V. Feschenko , V. E. Yants

We grew (Hg,Re)Ba$_2$Ca$_2$Cu$_3$O$_{8+\delta}$ ((Hg,Re)1223) single crystals with good reproducibility via the single-step flux method using monoxides as raw materials. A double-sealing method using a thick-walled quartz tube and a…

We report persistent photoconductivity in $p$-type Sb$_2$Se$_3$ single crystals doped with Cd or Zn, where enhanced conductivity remains for hours after illumination ceases at temperatures below $\sim$25~K. Comparative transport and…

材料科学 · 物理学 2025-10-17 F. Herklotz , E. V. Lavrov , T. D. C. Hobson , T. P. Shalvey , J. D. Major , K. Durose

Big pores, small pores, ordered pores, random pores, they all have a function and as is often found, show behaviour in new materials that is not always predicted or obvious at the outset. I started my research journey trying to put…

材料科学 · 物理学 2022-08-30 Colm O'Dwyer

Transport properties of artificial solids composed of colloidal CdSe nanocrystals (NCs) are studied from 6 K to 250 K, before and after annealing. Annealing results in greatly enhanced dark and photocurrent in NC solids, while transmission…

介观与纳米尺度物理 · 物理学 2009-11-07 M. Drndic , M. Vitasovic , N. Y. Morgan , M. A. Kastner , M. G. Bawendi

We present the first detailed X-ray observations of optically-selected clusters at high redshift. Two clusters, Cl 1324+3011 at z = 0.76 and Cl 1604+4304 at z = 0.90, were observed with XMM-Newton. The optical center of each cluster is…

天体物理学 · 物理学 2009-11-10 Lori M. Lubin , John S. Mulchaey , Marc Postman

Solution growth of single crystals of the recently reported new compound Ce2PdIn8 was investigated. When growing from a stoichiometry in a range 2:1:20 - 2:1:35, single crystals of CeIn3 covered by a thin (~50 um) single-crystalline layer…

超导电性 · 物理学 2012-05-31 Klara Uhlirova , Jan Prokleska , Vladimir Sechovsky , Stanislav Danis

Comparative studies of the resonant transmission of light in the vicinity of exciton resonances, measured for 15 few-micron GaAs crystal slabs with different impurity concentrations $N$, reveal an unexpected tendency. While $N$ spans almost…

介观与纳米尺度物理 · 物理学 2015-01-13 D. A. Zaitsev , N. D. Ilinskaya , A. V. Koudinov , N. K. Poletaev , A. Yu. Egorov , A. V. Kavokin , R. P. Seisyan

We deposited thin layers of CdS and ZnS nanoparticles embedded in a thermoplastic cyclo-olephin copolymer (COC) with elevated optical transparency and highly bio-compatible. The nanoparticles were obtained by thiolate precursors previously…

材料科学 · 物理学 2007-05-23 T. Di Luccio , E. Piscopiello , A. M. Laera , M. Vittori Antisari

Here, we report self flux single crystal growth of FeTe1-xSex for x = 0 to 0.50 series via solid state reaction route,the resulted crystals as seen are shiny. X Ray diffraction performed on the surface of crystals elucidated the growth in…

超导电性 · 物理学 2019-01-15 P. K. Maheshwari , V. Raghavendra Reddy , Bhasker Gahtori , V. P. S. Awana

An eutectic AlCl$_3$/KCl molten salt method in a horizontal configuration was employed to grow millimeter-sized and composition homogeneous CuFeSe$_2$ single crystals due to the continuous growth process in a temperature gradient induced…

The authors of the title paper (Spectrochim. Acta 79A (2011) 340-343) report the crystal growth of cadmium manganese thiocyanate CdMn(SCN)4 and its characterization by single crystal X-ray diffraction and infrared spectrum. Many points of…

材料科学 · 物理学 2015-06-09 Bikshandarkoil R. Srinivasan

The purpose of this project is to investigate the use of charge couple devices (CCDs) to detect electrons directly. This can be done in transmission electron microscopy (TEM) for electrons over 100 KeV, but for space plasma instruments,…

仪器与探测器 · 物理学 2015-10-28 S. R. Mirfayzi

Superconductivity was discovered in a Ni0:05TaS2 single crystal. A Ni0:05TaS2 single crystal was successfully grown via the NaCl/KCl flux method. The obtained lattice constant c of Ni0:05TaS2 is 1.1999 nm, which is significantly smaller…

超导电性 · 物理学 2015-05-13 X. D. Zhu , Y. P. Sun , S. B. Zhang , H. C. Lei , X. B. Zhu , Lijun Li , Z. R. Yang , W. H. Song , J. M. Dai

Single crystals of tetragonal Fe1.00Se were grown from polycrystalline material by chemical vapor transport reaction at temperatures below 723 K using AlCl3 as transport additive. The plate-shaped single crystals have edge lengths up to 4…

Transferring the nanocrystals (NCs) from the laboratory environment toward practical applications has raised new challenges. In the case of NCs for display and lightning, the focus was on reduced Auger recombination and maintaining…

A radiopure cadmium tungstate crystal scintillator, enriched in 106-Cd to 66%, with mass of 216 g (106-CdWO4) was used in coincidence with four ultra-low background HPGe detectors contained in a single cryostat to search for double beta…