Results 1 to 10 of about 166,763 (371)

Elastic effects of vacancies in strontium titanate: Short- and long-range strain fields, elastic dipole tensors, and chemical strain [PDF]

Phys. Rev. B 80, 064108 (2009), 2008
We present a study of the local strain effects associated with vacancy defects in strontium titanate and report the first calculations of elastic dipole tensors and chemical strains for point defects in perovskites. The combination of local and long-range results will enable determination of x-ray scattering signatures that can be compared with ...
D. Roundy, Daniel A. Freedman, E. Polak, F. S. Galasso, M. E. Lines, M. R. Hestenes, T. A. Arias   +6 more
arxiv   +3 more sources

A Sr-Rich Star on the Main Sequence of Omega Centauri [PDF]

Astrophys.J.653:L117-L120,2006, 2006
Abundance ratios relative to iron for carbon, nitrogen, strontium and barium are presented for a metal-rich main sequence star ([Fe/H]=--0.74) in the globular cluster omega Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen, but more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe] ~ 1.6 dex, while ...
Asplund M., G. S. Da Costa, John E. Norris, Lattanzio J. C., Laura M. Stanford, Lloyd Evans T., Prantzos N., Russell D. Cannon   +7 more
arxiv   +6 more sources

Proposal to stabilize and detect half-quantum vortices in strontium ruthenate thin films: Non-Abelian braiding statistics of vortex matter in a ${p_x}+i{p_y}$ superconductor [PDF]

Phys. Rev. B 73, 220502 (R) (2006), 2005
We propose a simple way to stabilize half-quantum vortices in superconducting strontium ruthenate, assuming the order parameter is of chiral $p_x + ip_y$ symmetry, as is suggested by recent experiments. The method, first given by Salomaa and Volovik in the context of Helium-3, is very naturally suited for strontium ruthenate, which has a layered, quasi-
A. J. Leggett, C. Day, Chetan Nayak, D. Vollhardt, G. E. Volovik, G. E. Volovik, H. Adachi, M. C. Cross, Sankar Das Sarma, Sumanta Tewari   +9 more
arxiv   +3 more sources

Fast and dense magneto-optical traps for Strontium [PDF]

Phys. Rev. A 99, 063421 (2019), 2019
We improve the efficiency of sawtooth-wave-adiabatic-passage (SWAP) cooling for strontium atoms in three dimensions and combine it with standard narrow-line laser cooling. With this technique, we create strontium magneto-optical traps with $6\times 10^7$ bosonic $^{88}$Sr ($1\times 10^7$ fermionic $^{87}$Sr) atoms at phase-space densities of $2\times ...
Blatt, S., Bloch, I., Heinz, A., Park, A. J., Snigirev, S.   +4 more
arxiv   +3 more sources

A compact and efficient strontium oven for laser-cooling experiments [PDF]

Rev. Sci. Instrum. 83, 103101 (2012), 2012
Here we describe a compact and efficient strontium oven well suited for laser-cooling experiments. Novel design solutions allowed us to produce a collimated strontium atomic beam with a flux of 1.0\times10^13 s^-1 cm^-2 at the oven temperature of 450 {\deg}C, reached with an electrical power consumption of 36 W.
Ch. Lisdat, G. M. Tino, Lide D. R., M. Prevedelli, M. Schioppo, N. Poli, St. Falke, U. Sterr   +7 more
arxiv   +5 more sources

Microscopic mechanisms for the Fermi-liquid behavior of Nb-doped strontium titanate [PDF]

Physical Review B 86, 045113 (2012), 2012
The relaxation rate in Nb-doped strontium titanate involving different scattering channels is investigated theoretically. It is demonstrated that the total relaxation rate in SrTiO_{3} is provided mainly by two mechanisms. The Baber electron-electron scattering with participation of both Coulomb and phonon-mediated electron-electron interactions ...
Devreese, J. T., Klimin, S. N., Tempere, J., van der Marel, D.   +3 more
arxiv   +3 more sources

Enhanced Magnetic Trap Loading for Atomic Strontium [PDF]

Phys. Rev. A 92, 043418 (2015), 2015
We report on a technique to improve the continuous loading of atomic strontium into a magnetic trap from a Magneto-Optical Trap (MOT). This is achieved by adding a depumping laser tuned to the 3P1 to 3S1 (688-nm) transition. The depumping laser increases atom number in the magnetic trap and subsequent cooling stages by up to 65 % for the bosonic ...
Barker, D. S., Campbell, G. K., Pisenti, N. C., Reschovsky, B. J.   +3 more
arxiv   +3 more sources

Degenerate quantum gases of strontium [PDF]

, 2013
Degenerate quantum gases of alkaline-earth-like elements open new opportunities in research areas ranging from molecular physics to the study of strongly correlated systems. These experiments exploit the rich electronic structure of these elements, which is markedly different from the one of other species for which quantum degeneracy has been attained.
Killian, Thomas C., Schreck, Florian, Stellmer, Simon   +2 more
arxiv   +3 more sources

Dose-dependent enhancement of in vitro osteogenic activity on strontium-decorated polyetheretherketone [PDF]

Scientific Reports
Polyetheretherketone (PEEK) is widely used in orthopedic and dental implants due to its excellent mechanical properties, chemical stability, and biocompatibility.
Yongheng Zhang, Lvhua Liu, Mengqi Li, Shufu Wang, Jingjing Fu, Mingyuan Yang, Chunxi Yan, Ying Liu, Yanyan Zheng   +8 more
doaj   +2 more sources

Research Progress on Strontium Function in Foods [PDF]

Shipin Kexue, 2023
Strontium is of great significance to human health and participates in various physiological functions and biochemical effects. It has great prospects in the development of health products and natural medicines. Strontium not only has a protective effect
HUANG Xulai, GAO Yanan, ZHANG Yangdong, WANG Jiaqi, ZHENG Nan
doaj   +1 more source