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The Journal of Chemical Physics : Perturbative calculation of spin...

By: Kerstin Klein and Jürgen Gauss

Description: Spin-orbit splittings for 2Π states are calculated within coupled-cluster (CC) theory via first-order degenerate perturbation theory. Using the equation-of-motion CC variant for ionization potentials (EOMIP-CC), the two components of the considered 2Π state are treated in a balanced way by generating both radical states via annihilation of one electron out of the CC wave function of the corresponding anion. We report on the implementation of the described ap...

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Applied Physics Letters : Effects of disorder and scaling of optic...

By: K. R. Mavani, M. Nagai, D. S. Rana, H. Yada, I. Kawayama et al

Description: We have explored the low energy charge dynamics of charge-ordered Nd0.5Ca0.5MnO3 and Ba-doped Nd0.5Ca0.48Ba0.02MnO3 manganite thin films by recording the complex optical spectra using terahertz time-domain spectroscopy. The extracted frequency- and temperature-dependent optical conductivity (σ) and dielectric constant (ε1) show distinct features at Néel’s ordering and the charge-ordering temperatures (TN and TCO) . We found that the Ba-doping induced cation...

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Physics of Plasmas : Global particle-in-cell simulations of Alfvén...

By: Alexey Mishchenko, Roman Hatzky, and Axel Könies

Description: Global linear gyrokinetic particle-in-cell (PIC) simulations of electromagnetic modes in pinch and tokamak geometries are reported. The global Alfvén eigenmode, the mirror Alfvén eigenmode, the toroidal Alfvén eigenmode, and the kinetic ballooning modes have been simulated. All plasma species have been treated kinetically (i.e., no hybrid fluid-kinetic or reduced-kinetic model has been applied). The main intention of the paper is to demonstrate that the glob...

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Biblioteca Hispanica : Errors and Popular Concerns and Explanation...

By: Alejandro Pontes and Fernandez
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Applied Physics Letters : Measurement and evaluation of the interf...

By: Heng-Chieh Chien, Da-Jeng Yao, and Cheng-Ting Hsu

Description: We used a sandwiched film structure of dielectric, metal, and dielectric to measure and also to estimate theoretically the metal-dielectric interfacial thermal resistance. In this structure, a metal layer with a thickness of about 10 nm, including chromium, titanium, aluminum, nickel, and platinum, is sandwiched between two SiO2 layers with a thickness of 100 nm prepared by plasma enhanced chemical vapor deposition. The estimates, 10−10–10−9 m2 K W−1, calcul...

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Journal of Applied Physics : Nanoindentation-induced plastic defor...

By: Z. H. Sun and K. W. White

Description: The plastic deformation and fracture behavior of individual a- and c-domains of (001) oriented BaTiO3 single crystal are studied with nanoindentation and atomic force microscopy. Consistent with previous observations in rocksalt and perovskite crystals, square-shaped pileups directly surround the residual indents, and rosette arm patterns extend beyond these pileups. These features have been ascribed to dislocation activities on the {110}〈10〉 slip systems in...

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Review of Scientific Instruments : Semicircular bend testing with ...

By: F. Dai, K. Xia, and S. N. Luo

Description: We propose and validate an indirect tensile testing method to measure the dynamic tensile strength of rocks and other brittle solids: semicircular bend (SCB) testing with a modified split Hopkinson pressure bar (SHPB) system. A strain gauge is mounted near the failure spot on the specimen to determine the rupture time. The momentum trap technique is utilized to ensure single pulse loading for postmortem examination. Tests without and with pulse shaping are c...

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Biblioteca Hispanica : Programme Lessons of a Course of Natural Hi...

By: Emilio Ribera Gomez
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Review of Scientific Instruments : A nanotube based electron micro...

By: David E. Bordelon, Jian Zhang, Sarah Graboski, Adrienne Cox, Eric Schreiber et al

Description: A prototype cellular irradiator utilizing a carbon nanotube (CNT) based field emission electron source has been developed for microscopic image-guided cellular region irradiation. The CNT cellular irradiation system has shown great potential to be a high temporal and spatial resolution research tool to enable researchers to gain a better understanding of the intricate cellular and intercellular microprocesses occurring following radiation deposition, which i...

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Journal of Mathematical Physics : Additivity and distinguishabilit...

By: Bill Rosgen

Description: A random unitary channel is one that is given by a convex combination of unitary channels. It is shown that the conjectures on the additivity of the minimum output entropy and the multiplicativity of the maximum output p-norm can be equivalently restated in terms of random unitary channels. This is done by constructing a random unitary approximation to a general quantum channel. This approximation can be constructed efficiently, and so it is also applied to ...

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Journal of Applied Physics : The dissociation of excitons at indiu...

By: X. Y. Sun, Q. L. Song, M. L. Wang, X. M. Ding, X. Y. Hou et al

Description: Exciton dissociation process at indium tin oxide (ITO)/copper phthalocyanine (CuPc) interface of ITO/CuPc(370 nm)/Al is studied by transient photovoltage method. A negative-to-positive change in the polarity of photovoltage upon pulsed laser irradiation is observed in CuPc thin film. The polarity change is regarded as a summation of the effect of exciton dissociation at ITO/CuPc interface (fast process) and that of free carrier separation by built-in field (...

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Journal of Applied Physics : Ultrafast heating and resolution of r...

By: M. M. Aziz, M. R. Belmont, and C. D. Wright

Description: This work presents an analytical study of the thermally activated amorphous-to-crystalline phase-change process when the heating source has a delta function temporal profile. This simulates the case of ultrafast heating where crystallization in the amorphous phase-change medium occurs during cooling. The study produced closed-form expressions that predict the necessary peak temperature, and hence energy density, in the phase-change medium for successful crys...

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Journal of Applied Physics : Specific multiple-scattering process ...

By: Ying Cheng and XiaoJun Liu

Description: It was qualitatively demonstrated through finite-element full-wave simulations that acoustic cloak can be constructed by using concentric multilayered structure with alternating homogeneous isotropic materials [ Y. Cheng et al., Appl. Phys. Lett. 92, 151913 (2008) ]. Here we present a sequential in-depth analysis of the proposed cloak by means of the multiple-scattering algorithms. Calculated pressure fields demonstrate that the cloak possesses low-reflectio...

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Journal of Applied Physics : Comparison of sensitivities of carbon...

By: Masuhiro Abe, Katsuyuki Murata, Tatsuaki Ataka, and Kazuhiko Matsumoto

Description: The sensitivities of biosensors using top-gate-type carbon nanotube field-effect transistors (CNT-FETs) with and without a top metal gate were compared. The CNT-FET biosensor without the top metal gate (sensor I) showed about three times higher transconductance than the one with the top metal gate (sensor II) when they were modulated by a reference gate electrode placed in a solution. Further, the sensitivity of sensor I was three times higher than sensor II...

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Applied Physics Letters : Reversible photoswitching behavior in bu...

By: Rahima Khaton, Shin-ichiro Kashiwagi, Toshifumi Iimori, and Nobuhiro Ohta

Description: A photoinduced reversible change in bulk resistance of polycrystalline AgI is observed at room temperature. The original yellow color of the sample changes to dark brown with UV (308 nm) photoirradiation, associated with the small decrease in the bulk resistance. A reversible switching of color between dark brown and yellow is observed by alternative UV-visible photoirradiation, associated with a switching between high and low resistance states. The observed...

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Applied Physics Letters : Dielectric properties of Ba0.5Sr0.5TiO3/...

By: Niandeng Xiong, Shuwen Jiang, Yanrong Li, Lefan Tan, and Ruguan Li

Description: The Ba0.5Sr0.5TiO3(BST)/SiN bilayered thin films with a SiN layer serving as a buffer layer between the top electrode and the BST layer have been prepared onto Pt-coated c-plane sapphire substrates. The dielectric measurements show that the loss tangent has been significantly lowered. The dielectric properties of the BST/SiN bilayered thin films are strongly dependent on the SiN thickness. The BST/SiN bilayered thin films at a SiN/BST thickness ratio of 0.2 ...

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Biblioteca Hispanica : Course Methodical Popular Notions of Natura...

By: Jose Maria Paniagua
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Biblioteca Hispanica : Circular and Regulation of the Spanish Soci...

By: Biblioteca Hispanica

Description: History Spanish Royal Society of Natural

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Journal of Applied Physics : Thermal peculiarity of AlAs-capped In...

By: V. G. Dorogan, Yu. I. Mazur, J. H. Lee, Zh. M. Wang, M. E. Ware et al

Description: GaAs and AlAs thin capping layers as well as postgrowth rapid thermal annealing (RTA) were applied to InAs quantum dots (QDs) grown by molecular beam epitaxy to study the tunability of optical properties of QDs by photoluminescence (PL) methods. The PL of AlAs-capped QDs shows double-peak structure, as opposed to GaAs-capped QDs, which is due to the formation of two families of QDs in the AlAs-capped sample confirmed by the power dependent PL measurements. T...

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Journal of Applied Physics : Effective medium theory for strongly ...

By: P. Loschialpo, D. Smith, and D. Zabetakis

Description: A theoretical model has been developed for predicting the reflectivity of thin planar surfaces imbedded with long conductive fibers. Intersecting fibers in the plane form larger conducting clusters. The model includes this effect, which serves to increase the reflectivity. Magnetic coupling between the fibers is also included. This coupling is found to be particularly important at higher frequencies. Test panels were made using a direct write process to imbe...

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