The effect of strain on the resistivity and thermopower of ferromagnetic manganites has been examined based on the model that incorporates the electron-lattice interaction through the Jahn-Teller effect and an effective hopping determined by nearest neighbour spin-spin correlation of t2g electrons.The metal insulator transition temperature associated with resistivity decreases with increase in ...

2014 The system CaF2 : Fe2+ has been studied by Mössbauer spectroscopy in the slow relaxation regime (4.2-14 K). Far infrared experiments have been performed in the 1.5-35 K temperature range and at 1.5 K in an external magnetic field up to 8 T. From both Mössbauer and far infrared results, one can deduce that the average distance between the spin-orbit levels within the Eg state is K = 17 cm-1...

The so-called Gazeau-Klauder and Perelomov coherent states are introduced for an arbitrary quantum system. We give also the general framework to construct the generalized intelligent states which minimize the RobertsonSchrödinger uncertainty relation. As illustration, the Pöschl-Teller potentials of trigonometric type will be chosen. We show the advantage of the analytical representations of Ga...

Y. Fujita,* Y. Shimbara, T. Adachi, G. P. A. Berg, B. A. Brown, H. Fujita, K. Hatanaka, J. Kamiya, K. Nakanishi, Y. Sakemi, S. Sasaki, Y. Shimizu, Y. Tameshige, M. Uchida, T. Wakasa, and M. Yosoi Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan KVI, Zernikelaan 25, 9747 AA Groningen, Th...

The last decade has witnessed both quantitative and qualitative progress in shell-model studies, which have resulted in remarkable gains in our understanding of the structure of the nucleus. Indeed, it is now possible to diagonalize matrices in determinantal spaces of dimensionality up to 109 using the Lanczos tridiagonal construction, whose formal and numerical aspects are analyzed in this rev...

Direct optical absorption measurements ofjet-cooled metal clusters formed in a pulsed molecular beam have been made using a sensitive new absorption technique employing pulsed laser sources. Metal clusters and other metal containing species have been observed in this initial study. Absorption measurements of the Cu, ‘A;-‘E’ system reveal strong intensities for vibronic bands seen only weakly in...

The relative distribution of the basins of attraction of the chemical species and of the transi­ tion states is derived for the thermal isomerization of cyclobutene to butadiene. It is shown that the transition states for the symmetry-allowed and symmetry-forbidden path­ ways are lumomers of one another. Use is made of the structural stability principle of Ariel Fernandez and Oktay Sinanoglu to...

In this study, we obtained the position-momentum uncertainties and some uncertainty relations for the Pöschl-Teller-type potential for any ℓ. The radial expectation values of r −2 , r 2 and p 2 are obtained from which the Heisenberg Uncertainty principle holds for the potential model under consideration. The Fisher information is then obtained and it is observed that the Fisher-information-base...

Abstract We have developed a theoretical method for interpretation of photoionization experiments with the H3 molecule. In the present study we give a detailed description of the method, which combines multichannel quantum defect theory, the adiabatic hyperspherical approach, and the techniques of outgoing Siegert pseudostates. The present method accounts for vibrational and rotation excitation...

We discuss a powerful algorithm for calculating static and dynamic properties of electron– phonon coupled systems with dynamic quantum phonons. The difference between Jahn–Teller polarons present in certain transition metal oxides and simpler Holstein polarons is explored. We calculate the dynamics of polaron formation from a bare injected electron, which has been measured in several recent exp...