Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Ocko, Ben"'
Autor:
Shpyrko, Oleg G., Grigoriev, Alexei Yu., Streitel, Reinhard, Pontoni, Diego, Pershan, Peter S., Ocko, Ben, Deutsch, Moshe, Meron, Mati, Lin, Binhua
Publikováno v:
Phys. Rev. Lett. 95, 106103 (2005)
Resonant x-ray reflectivity of the surface of the liquid phase of the Bi$_{43}$Sn$_{57}$ eutectic alloy reveals atomic-scale demixing extending over three near-surface atomic layers. Due to the absence of underlying atomic lattice which typically def
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501173
Autor:
Tostmann, Holger, DiMasi, Elaine, Shpyrko, Oleg G., Ocko, Ben M., Pershan, Peter S., Deutsch, Moshe
Surface sensitive x-ray scattering techniques with atomic scale resolution are employed to investigate the microscopic structure of the surface of three classes of liquid binary alloys: (i) Surface segregation in partly miscible binary alloys as pred
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412112
Autor:
Tostmann, Holger, Shpyrko, Oleg, Pershan, Peter S., Dimasi, Elaine, Ocko, Ben, Deutsch, Moshe
Publikováno v:
Physical Review Letters 84, 4385 (2000)
X-ray reflectivity measurements of the binary liquid Ga-Bi alloy reveal a dramatically different surface structure above and below the monotectic temperature $T_{mono}=222^{\circ}$ C. A Gibbs-adsorbed Bi monolayer resides at the surface at both regim
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407270
Autor:
Huber, Patrick, Shpyrko, Oleg, Pershan, Peter S., Tostmann, Holger, DiMasi, Elaine, Ocko, Ben M., Deutsch, Moshe
Publikováno v:
Colloids & Surfaces A. 206, 515 (2002)
We present x-ray reflectivity measurements from the free surface of a liquid gallium-bismuth alloy (Ga-Bi) in the temperature range close to the bulk monotectic temperature $T_{mono} = 222$C. Our measurements indicate a continuous formation of a thic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406659
Autor:
Huber, Patrick, Shpyrko, Oleg, Pershan, Peter S., DiMasi, Elaine, Ocko, Ben M., Deutsch, Moshe
Publikováno v:
Phys. Rev. B. 68 085409 (2003)
We present an x-ray reflectivity study of wetting at the free surface of the binary liquid metal gallium-bismuth (Ga-Bi) in the region where the bulk phase separates into Bi-rich and Ga-rich liquid phases. The measurements reveal the evolution of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406661
Surface Structure of Liquid Metals and the Effect of Capillary Waves: X-ray Studies on Liquid Indium
Autor:
Tostmann, Holger, Shpyrko, Oleg, Pershan, Peter S., Dimasi, Elaine, Ocko, Ben, Deutsch, Moshe
Publikováno v:
Phys. Rev. B 59, 783 (1999)
We report x-ray reflectivity (XR) and small angle off-specular diffuse scattering (DS) measurements from the surface of liquid Indium close to its melting point of $156^\circ$C. From the XR measurements we extract the surface structure factor convolv
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406582
Autor:
Shpyrko, Oleg, Huber, Patrick, Pershan, Peter S., Tostmann, Holger, Grigoriev, Alexei, Ocko, Ben, Deutsch, Moshe
Publikováno v:
Phys. Rev. B 67, 115405 (2003)
We present x-ray reflectivity and diffuse scattering measurements from the liquid surface of pure potassium. They strongly suggest the existence of atomic layering at the free surface of a pure liquid metal with low surface tension. Prior to this stu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406585
Autor:
Shpyrko, Oleg G., Grigoriev, Alexei Yu., Pershan, Peter S., Lin, Binhua, Meron, Mati, Graber, Tim, Gebhardt, Jeff, Ocko, Ben, Deutsch, Moshe
Publikováno v:
PHYSICAL REVIEW B 70, 224206 (2004)
X-ray reflectivity measurements on the free surface of liquid Sn are presented. They exhibit the high-angle peak, indicative of surface-induced layering, also found for other pure liquid metals (Hg, Ga and In). However, a low-angle peak, not hitherto
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406583
Autor:
Shpyrko, Oleg, Fukuto, Masafumi, Pershan, Peter, Ocko, Ben, Kuzmenko, Ivan, Gog, Thomas, Deutsch, Moshe
Publikováno v:
Phys. Rev. B 69 245423, (2004)
Recent measurements show that the free surfaces of liquid metals and alloys are always layered, regardless of composition and surface tension; a result supported by three decades of simulations and theory. Recent theoretical work claims, however, tha
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406579
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