Results 81 to 90 of about 3,503 (278)

The Possibility of New Complex Magnet Materials

Advanced Materials, EarlyView.
The quest for stronger magnets enters a new era. With the developments of AI‐driven materials discovery, computational prediction of magnetic properties, and autonomous laboratories, researchers can now explore millions of untested structures. Discovery of next‐generation ultra‐powerful magnets – critical for electric vehicles, renewable energy, and ...
G. Jeffrey Snyder
wiley   +1 more source

A review of atomic clock technology, the performance capability of present spaceborne and terrestrial atomic clocks, and a look toward the future [PDF]

Clocks have played a strong role in the development of general relativity. The concept of the proper clock is presently best realized by atomic clocks, whose development as precision instruments has evolved very rapidly in the last decades.
Vessot, Robert F. C.
core   +1 more source

Diverse Cation Exchange in Layered Titanate Nanostructures for Tailored Catalysis

Advanced Materials, EarlyView.
H+(H3O+)‐intercalated layered titanate enables stable intercalation of 42 single‐metal and multication combinations. Alkali‐metal intercalation tunes Rh charge density, yielding an efficient propylene hydroformylation catalyst. These results establish a generalizable intercalation platform for rational catalyst design and provide a library supporting ...
Hyoseok Kim, Daewon Oh, Miyeon Kim, Taein Lee, Sihyeon Baek, Wonsik Jang, Jong‐Seong Bae, Jihun Kim, Jongkyoung Kim, Taeheon Kim, Changhun Hur, Sinmyung Yoon, Hu Young Jeong, Jeong Woo Han, Kwangjin An, Seungho Cho   +15 more
wiley   +1 more source

An analytic technique for statistically modeling random atomic clock errors in estimation [PDF]

Minimum variance estimation requires that the statistics of random observation errors be modeled properly. If measurements are derived through the use of atomic frequency standards, then one source of error affecting the observable is random fluctuation ...
Fell, P. J.
core   +1 more source

Miniature Optical Atomic Clock: Stabilization of a Kerr Comb Oscillator [PDF]

, 2013
Mechanical clocks consist of a pendulum and a clockwork that translates the pendulum period to displayed time. The most advanced clocks utilize optical transitions in atoms in place of the pendulum and an optical frequency comb generated by a femtosecond
Byrd, J., Eliyahu, D., Ilchenko, V. S., Liang, W., Maleki, L., Matsko, A. B., Savchenkov, A. A., Seidel, D.   +7 more
core  

Cold atom Clocks and Applications

, 2005
This paper describes advances in microwave frequency standards using laser-cooled atoms at BNM-SYRTE. First, recent improvements of the $^{133}$Cs and $^{87}$Rb atomic fountains are described.
, , A Clairon, A Luiten, Angstmann E J, Berkeland D J, Bize S, Bize S, Bize S P Gill, Bordé C J, C Salomon, C Vian, Chu S, Chu S, Clairon A, Courtillot I, Damour T, Damour T, Dzuba V A, Dzuba V A, Dzuba V A, Dzuba V A, F Pereira dos Santos, Fertig C, Flambaum V V, Flambaum V V, G Santarelli, Ghezali S, Gibble K, H Marion, I Maksimovic, J Grünert, Karshenboim S G, Katori H P Gill, Kuwamoto T, L Cacciapuoti, Langacker P, Laurent P, Laurent P, M Abgrall, M Tobar, Mann A G, Marciano W J, Marion H, Narbonneau F, Niering M, P Gill, P Laurent, P Lemonde, P Rosenbusch, P Wolf, Park C Y, Parker T E, Peik E, Peik E, Porsev S G, Prestage J D, Richard J-Y, S Bize, Salomon C, Salomon C Veillet C, Schröder R, Sortais Y, Stenger J, Vessot R F C, Vian C, Will C, Young B C   +67 more
core   +3 more sources

Anomalous Spin‐Optical Helical Effect in Ti‐Based Kagome Metal

Advanced Materials, EarlyView.
The kagome lattice hosts diverse correlated quantum states, including elusive loop currents. We report spin‐handedness selective signals in CsTi3Bi5, termed the anomalous spin‐optical helical effect, surpassing conventional spin responses. Arising from light helicity coupled to spin‐orbital correlations, this effect provides a sensitive, indirect probe
Federico Mazzola, Wojciech Brzezicki, Chiara Bigi, Armando Consiglio, Luciano Jacopo D'Onofrio, Maria Teresa Mercaldo, Adam Kłosiński, François Bertran, Patrick Le Fèvre, Oliver J. Clark, Mark T. Edmonds, Manuel Tuniz, Alessandro De Vita, Vincent Polewczyk, Jeppe B. Jacobsen, Henrik Jacobsen, Jill A. Miwa, Justin W. Wells, Anupam Jana, Ivana Vobornik, Jun Fujii, Niccolo Mignani, Narges Tarakameh Samani, Alberto Crepaldi, Giorgio Sangiovanni, Anshu Kataria, Tommaso Morresi, Samuele Sanna, Pietro Bonfá, Brenden R. Ortiz, Ganesh Pokharel, Stephen D. Wilson, Domenico Di Sante, Carmine Ortix, Mario Cuoco   +34 more
wiley   +1 more source

Hydrogen-maser time and frequency standard at Agassiz Observatory [PDF]

Installation of hydrogen maser for very long baseline ...
Levine, M. W., Vessot, R. F. C.
core   +1 more source

Ramsey spectroscopy of high-contrast CPT resonances with push-pull optical pumping in Cs vapor

, 2013
We report the detection of high-contrast and narrow Coherent Population Trapping (CPT) Ramsey fringes in a Cs vapor cell using a simple-architecture laser system. The latter allows the combination of push-pull optical pumping (PPOP) and a temporal Ramsey-
Boudot, Rodolphe, de Clercq, Emeric, Guérandel, Stéphane, Liu, Xiaochi, Mérolla, Jean-Marc   +4 more
core   +3 more sources

Vacuum‐Evaporated, Lead‐Free RbYbI3 Perovskite Interlayers for Universal Electron Injection in High‐Performance Organic Light‐Emitting Diodes

Advanced Materials, EarlyView.
ABSTRACT The optoelectronic performance of organic light‐emitting diodes (OLEDs) is critically governed by charge injection from electrodes into organic layers, where significant energy barriers at the interfaces often impede efficient charge injection.
Amarja S. Katware, Woo‐Sam Kim, Jee‐Hun Jang, Hanbeen Lee, Al Amin, Jino Im, Beom‐Soo Kim, Jeong‐Hwan Lee   +7 more
wiley   +1 more source