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First-principles calculations using density functional theory and two methods in comparison, Quantum ESPRESSO and Siesta, are done on large supercells which describe different placements of two identical adsorbed alkali metal atoms (of…

Materials Science · Physics 2021-09-01 Kazem Zhour , Andrei Postnikov

In the present paper the problem of the radiative association of atoms of carbon C with electrons $e^{-}$ for kinetic temperatures $T_{c}$ of $100 < T_{c} < 3000$ K is considered. The calculation of the rate rate constant of the radiative…

Astrophysics · Physics 2007-05-23 J. Campos , A. Lipovka , J. Saucedo

We report the observation of quantized translational and rotational motion of molecular hydrogen inside the cages of C60. Narrow infrared absorption lines at the temperature of 6K correspond to vibrational excitations in combination with…

Rate coefficient for state-to-state rotational transitions in H+ collision with CS has been obtained using accurate quantum dynamical close-coupling calculations to interpret microwave astronomical observations. Accurate three dimensional…

Chemical Physics · Physics 2016-04-19 Rajwant Kaur , T. J. Dhilip Kumar

Solid state high resolution $^{13}C$ NMR has been used to investigate the physical properties of pristine $C_{60}$ after intercalation with molecular oxygen. By studying the dipolar and hyperfine interactions between Curie type paramagnetic…

Condensed Matter · Physics 2009-10-28 P. Bernier , I. Luk'yanchuk , Z. Belahmer , M. Ribet , L. Firlej

Synthesis of the biological "energy currency molecule" adenosine triphosphate ATP is accomplished by FoF1-ATP synthase. In the plasma membrane of Escherichia coli, proton-driven rotation of a ring of 10 c subunits in the Fo motor powers…

Biomolecules · Quantitative Biology 2009-03-03 Monika G. Dueser , Nawid Zarrabi , Daniel J. Cipriano , Stefan Ernst , Gary D. Glick , Stanley D. Dunn , Michael Boersch

The static path approximation to the path integral representation of partition function provides a natural microscopic basis to deal with thermal fluctuations around mean field configurations. Using this approach for one-dimensional…

Nuclear Theory · Physics 2009-10-22 B. K. Agrawal , A. Ansari

We present spatially and spectrally-resolved observations of CH$_3$OH emission from comet C/2012 K1 (PanSTARRS) using The Atacama Large Millimeter/submillimeter Array (ALMA) on 2014 June 28-29. Two-dimensional maps of the line-of-sight…

Viruses are right at the interface of inanimate matter and life. However, recent experiments [T. Sakai, et al., J.~Virol.~{\bf 92}, e01522-17 (2018)] have shown that some influenza strains can actively roll on glycan-covered surfaces. In a…

Soft Condensed Matter · Physics 2022-04-04 Pedro A. Soria Ruiz , Falko Ziebert , Igor M. Kulić

In an effort to understand the low temperature behavior of recently synthesized molecular magnets we present numerical evidence for the existence of a rotational band in systems of quantum spins interacting with nearest-neighbor…

Materials Science · Physics 2009-10-31 J. Schnack , Marshall Luban

The growth of thin amorphous hydrogenated carbon films (a-C:H) on diamond (111) surface from the bombardment of CH2 radicals is studied using molecular dynamics simulations. The structural analysis shows that the local structure (e.g., the…

Materials Science · Physics 2014-11-27 Chuan-guo Zhang , Yong Yang , Ting Hao , Ming Zhang

The presence of free spins in granular Al films is directly demonstrated by $\mu$SR measurements. A Mott transition is observed by probing the increase of the spin-flip scattering rate of conduction electrons as the nano-size metallic…

Strongly Correlated Electrons · Physics 2015-06-04 N. Bachar , S. Lerer , S. Hacohen-Gourgy , B. Almog , H. Saadaoui , E. Morenzoni , G. Deutscher

The translational motion of molecular ions can be effectively cooled sympathetically to translational temperatures below 100 mK in ion traps through Coulomb interactions with laser-cooled atomic ions. The ro-vibrational degrees of freedom,…

Atomic Physics · Physics 2009-11-10 I. S. Vogelius , L. B. Madsen , M. Drewsen

The nuclear wobbling motion is studied from a microscopic viewpoint. It is shown that the expressions not only of the excitation energy but also of the electromagnetic transition rate in the microscopic RPA framework can be cast into the…

Nuclear Theory · Physics 2009-10-28 Yoshifumi R. Shimizu , Masayuki Matsuzaki

We study the rotational and vibrational heating of diatomic molecules placed near a surface at finite temperature on the basis of macroscopic quantum electrodynamics. The internal molecular evolution is governed by transition rates that…

Quantum Physics · Physics 2009-12-14 Stefan Yoshi Buhmann , M. R. Tarbutt , Stefan Scheel , E. A. Hinds

With MgH^+ ions as a test case, we investigate to what extent the rotational motion of smaller polar molecular ions sympathetically cooled into Coulomb crystals in linear Paul traps couples to the translational motions of the ion ensemble.…

Chemical Physics · Physics 2015-06-26 Anders Bertelsen , Solvejg Jørgensen , Michael Drewsen

The systematics of energy staggering for the magnetic rotational bands with $M1$ and $E2$ transition properties strictly consistent with the features of good candidates of magnetic rotational bands in the $A\sim80$, 110, 130 and 190 mass…

Nuclear Theory · Physics 2019-09-17 Wu-Ji Sun , Jian Li

The influence of triaxial deformation $\gamma$ on the purely collective form of wobbling motion in even-even nuclei are discussed based on the triaxial rotor model. It is found that the harmonic approximation is realized well when…

Nuclear Theory · Physics 2021-05-26 Bin Qi , Hui Zhang , Shou Yu Wang , Qi Bo Chen

The wobbling motion excited on triaxial superdeformed nuclei is studied in terms of the cranked shell model plus random phase approximation. Firstly, by calculating at a low rotational frequency the \gamma-dependence of the three moments of…

Nuclear Theory · Physics 2014-11-18 Masayuki Matsuzaki , Yoshifumi R. Shimizu , Kenichi Matsuyanagi

The mechanical properties of a solid, which relate its deformation to external applied forces, are key factors in enabling or disabling the use of an otherwise optimal material in any application, strongly influencing also its service…

Materials Science · Physics 2025-08-28 Margherita Marsili , Elisa Damiani , Davide Dalle Ave , Gabriele Losi , M. Clelia Righi