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We have designed and constructed a compact rotary substrate heater for the temperature range from 25 $^\circ$C to 700 $^\circ$C. The heater can be implemented in any deposition system where crystalline samples are needed. Its main function…

Instrumentation and Detectors · Physics 2020-12-04 Israel Perez , Tareik Netro , Mario Vazquez , Jose Elizalde

Rotochemical heating originates in a departure from beta equilibrium due to spin-down compression in a rotating neutron star. The main consequence is that the star eventually arrives at a quasi-equilibrium state, in which the thermal photon…

Astrophysics · Physics 2011-07-19 Rodrigo Fernández , Andreas Reisenegger

We present the results of the magnetic and specific heat measurements on V4 tetrahedral-cluster compound GaV4S8 between 2 to 300K. We find two transitions related to a structural change at 42K followed by ferromagnetic order at 12K on…

Strongly Correlated Electrons · Physics 2009-11-13 C. S. Yadav , A. K. Nigam , A. K. Rastogi

Measurements of thermal excitations of V-O and Y-Ba-Cu-O solid solutions have been performed by a method of inelastic neutron scattering for low-energy transfers range. Features at energy transfer about 3meV and about 5meV for V-O and…

Superconductivity · Physics 2007-07-26 S. I. Morozov

We investigate the thermodynamics of rotating Lovelock-Lifshitz black branes. We calculate the conserved and thermodynamic quantities of the solutions and obtain a relation between temperature, angular velocity, energy density, entropy…

High Energy Physics - Theory · Physics 2011-10-11 M. H. Dehghani , Sh. Asnafi

Magnetic properties of polycrystalline samples of RuSr$_2$(Gd$_{1.5}$Ce$_{0.5}$)Cu$_{2}$O$_{10-\delta}$, as-prepared (by solid-state reaction) and annealed (12 hours at 845$^{\circ}$C) in pure oxygen at different pressure (30, 62 and 78…

Strongly Correlated Electrons · Physics 2009-10-24 B. I. Belevtsev , V. B. Krasovitsky , D. G. Naugle , K. D. D. Rathnayaka , G. Agnolet , I. Felner

We report the first investigation of the performance of EOM-CC4 -- an approximate equation-of-motion coupled-cluster model which includes iterative quadruple excitations -- for vertical excitation energies in molecular systems. By…

Chemical Physics · Physics 2021-06-14 Pierre-François Loos , Devin A. Matthews , Filippo Lipparini , Denis Jacquemin

Stationary, spherical accretion onto an unmagnetized neutron star is here reconsidered on the wake of the seminal paper by Zel'dovich \& Shakura (1969). It is found that new ``hot'' solutions may exist for a wide range of luminosities.…

Astrophysics · Physics 2009-10-22 Roberto Turolla , Luca Zampieri , Monica Colpi , Aldo Treves

We observe a strong dependence of the exciton spin relaxation in CdTe quantum dots on the average dot size and the depth of the confining potential. For the excitons confined to the as-grown CdTe quantum dots we find the spin relaxation…

Materials Science · Physics 2009-11-10 S. Mackowski , T. Gurung , H. E. Jackson , L. M. Smith , W. Heiss , J. Kossut , G. Karczewski

We present a theoretical model for the thermal X-ray emission and cooling of isolated pulsars, assuming that pulsars are solid quark stars. We calculate the heat capacity for such a quark star, and the results show that the residual thermal…

High Energy Astrophysical Phenomena · Physics 2010-11-08 M. Yu , R. X. Xu

The composition-dependent thermal stability of (Cr$_{0.47 \mp 0.03}$Al$_{0.53 \mp 0.03}$)$_{z}$(O$_{y}$N$_{1-y}$)$_{1-z}$ thin films with O concentrations of y = 0, 0.15, and 0.40 is investigated up to 1200 {\deg}C and then compared to…

We investigate ionization and heating of gas in the dense, shielded clumps/cores of molecular clouds bathed by an influx of energetic, charged cosmic rays (CRs). These molecular clouds have complex structures, with substantial variation in…

Astrophysics of Galaxies · Physics 2021-06-02 Ellis R. Owen , Alvina Y. L. On , Shih-Ping Lai , Kinwah Wu

Cyclotron resonance of two-dimensional electrons is studied at low temperatures down to 0.4 K for a high-mobility Si/SiGe quantum well which exhibits a metallic temperature dependence of dc resistivity $\rho$. The relaxation time $\tau_{\rm…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 Ryuichi Masutomi , Kohei Sasaki , Ippei Yasuda , Akihito Sekine , Kentarou Sawano , Yasuhiro Shiraki , Tohru Okamoto

The bulk of solar coronal radiative loss consists of soft X-ray emission from quasi-static loops at the cores of Active Regions. In order to develop diagnostics for determining the heating mechanism of these loops from observations by…

Astrophysics · Physics 2014-11-18 P. C. H. Martens

The chemical differentiation of seven COMs in the extended region around Sgr B2 has been observed: CH$_2$OHCHO, CH$_3$OCHO, t-HCOOH, C$_2$H$_5$OH, and CH$_3$NH$_2$ were detected both in the extended region and near the hot cores Sgr B2(N)…

Astrophysics of Galaxies · Physics 2021-04-14 Yao Wang , Fujun Du , Dmitry Semenov , Hongchi Wang , Juan Li

Rotational excitation of isotopologues of HCN and HNC by thermal electron-impact is studied using the molecular {\bf R}-matrix method combined with the adiabatic-nuclei-rotation (ANR) approximation. Rate coefficients are obtained for…

Astrophysics · Physics 2009-11-13 A. Faure , H. N. Varambhia , T. Stoecklin , J. Tennyson

A rotation-vibration line list for the electronic ground state ($\tilde{X}^{1}A_{1}$) of SiH$_2$ is presented. The line list, named CATS, is suitable for temperatures up to 2000 K and covers the wavenumber range 0 - 10,000…

Chemical Physics · Physics 2020-04-03 Victoria H. J. Clark , Alec Owens , Jonathan Tennyson , Sergei N. Yurchenko

Signatures of the cluster spin glass have been found in a variety of experiments, with an effective onset temperature $T_{on}$ that is frequency dependent. We reanalyze the experimental results and find that they are characterized by a…

Superconductivity · Physics 2009-10-31 R. S. Markiewicz , F. Cordero , A. Paolone , R. Cantelli

The rovibrational kinetic energy for an arbitrary number of rigid molecules is computed. The result has the same general form as the kinetic energy in the molecular rovibrational Hamiltonian, although certain quantities are augmented to…

Atomic and Molecular Clusters · Physics 2009-10-31 Kevin A. Mitchell , Robert G. Littlejohn

The specific heat of (Na,Ca)Co_{2}O_{4} is measured at low-temperatures to determine the magnitude of the electronic specific-heat coefficient \gamma, in an attempt to gain an insight into the origin of the unusually large thermoelectric…

Strongly Correlated Electrons · Physics 2009-10-31 Yoichi Ando , N. Miyamoto , Kouji Segawa , T. Kawata , I. Terasaki