Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Headrick, Randall L."'
Autor:
Myint, Peco, Woodward, Jeffrey M., Wang, Chenyu, Zhang, Xiaozhi, Wiegart, Lutz, Fluerasu, Andrei, Headrick, Randall L., Eddy, Jr., Charles R., Ludwig, Karl F.
Sophisticated thin film growth techniques increasingly rely on the addition of a plasma component to open or widen a processing window, particularly at low temperatures. However, the addition of the plasma into the growth environment also complicates
Externí odkaz:
http://arxiv.org/abs/2306.13779
Autor:
Zhang, Xiaozhi, Ulbrandt, Jeffrey G., Myint, Peco, Fluerasu, Andrei, Wiegart, Lutz, Zhang, Yugang, Nelson, Christie, Ludwig, Karl F., Headrick, Randall L.
Desorption of deposited species plays a role in determining the evolution of surface morphology during crystal growth when the desorption time constant is short compared to the time to diffuse to a defect site, step edge or kink. However, experiments
Externí odkaz:
http://arxiv.org/abs/2305.18661
Autor:
Wang, Chenyu, Ludwig, Karl F., Wagenbach, Christa, Rainville, Meliha G., Narayanan, Suresh, Zhou, Hua, Ulbrandt, Jeffrey G., Headrick, Randall L.
We used the Coherent Grazing Incidence Small Angle X-Ray Scattering (Co-GISAXS) technique to study the average kinetics and nanoscale dynamics during early-stage a-WSi$_2$ sputter deposition. The kinetic and dynamic properties are examined as a funct
Externí odkaz:
http://arxiv.org/abs/2111.14285
Autor:
Myint, Peco, Erb, Denise, Zhang, Xiaozhi, Wiegart, Lutz, Zhang, Yugang, Fluerasu, Andrei, Headrick, Randall L., Facsko, Stefan, Ludwig, Jr, Karl F.
Publikováno v:
Phys. Rev. B 102 (2020)
Normal incidence 1 keV Ar$^+$ ion bombardment leads to amorphization and ultrasmoothing of Ge at room temperature, but at elevated temperatures the Ge surface remains crystalline and is unstable to the formation of self-organized nanoscale patterns o
Externí odkaz:
http://arxiv.org/abs/2008.06504
Autor:
Myint, Peco, Ludwig Jr., Karl F., Wiegart, Lutz, Zhang, Yugang, Fluerasu, Andrei, Zhang, Xiaozhi, Headrick, Randall L.
Publikováno v:
Phys. Rev. B 103, 195423 (2021)
Despite extensive study, fundamental understanding of self-organized patterning by broad-beam ion bombardment is still incomplete and controversial. Understanding the nanopatterning of elemental semiconductors, particularly silicon, is both foundatio
Externí odkaz:
http://arxiv.org/abs/2007.12294
Autor:
Myint, Peco, Ludwig Jr., Karl F., Wiegart, Lutz, Zhang, Yugang, Fluerasu, Andrei, Zhang, Xiaozhi, Headrick, Randall L.
Coherent grazing-incidence small-angle X-ray scattering is used to investigate the average kinetics and the fluctuation dynamics during self-organized nanopatterning of silicon by Ar$^+$ bombardment at 65$^{\circ}$ polar angle. At early times, the su
Externí odkaz:
http://arxiv.org/abs/2007.12253
Autor:
Myint, Peco, Ludwig, Jr., Karl F., Wiegart, Lutz, Zhang, Yugang, Fluerasu, Andrei, Zhang, Xiaozhi, Headrick, Randall L.
Publikováno v:
Phys. Rev. Lett. 126, 016101 (2021)
Investigating the relationship between structure and dynamical processes is a central goal in condensed matter physics. Perhaps the most noted relationship between the two is the phenomenon of de Gennes narrowing, in which relaxation times in liquids
Externí odkaz:
http://arxiv.org/abs/2007.07395
Autor:
Liu, Rui, Ulbrandt, Jeffrey G., Hsing, Hsiang-Chun, Gura, Anna, Bein, Benjamin, Sun, Alec, Pan, Charles, Bertino, Giulia, Lai, Amanda, Cheng, Kaize, Doyle, Eli, Evans-Lutterodt, Kenneth, Headrick, Randall L., Dawber, Matthew
Strain engineering of perovskite oxide thin films has proven to be an extremely powerful method for enhancing and inducing ferroelectric behavior. In ferroelectric thin films and superlattices, the polarization is intricately linked to crystal struct
Externí odkaz:
http://arxiv.org/abs/1909.12407
Autor:
Ulbrandt, Jeffrey G., Zhang, Xiaozhi, Liu, Rui, Evans-Lutterodt, Kenneth, Dawber, Matthew, Headrick, Randall L.
Publikováno v:
Phys. Rev. B 101, 241406 (2020)
Pulsed Laser Deposition (PLD) is widely used to grow epitaxial thin films of quantum materials such as complex oxides. Here, we use in-situ X-ray scattering to study homoepitaxy of SrTiO$_3$ by energetic (e-) and thermalized (th-) PLD. We find that e
Externí odkaz:
http://arxiv.org/abs/1907.08347
Autor:
Headrick, Randall L., Ulbrandt, Jeffrey G., Myint, Peco, Wan, Jing, Li, Yang, Fluerasu, Andrei, Zhang, Yugang, Wiegart, Lutz, Ludwig, Jr, Karl F.
Publikováno v:
Nature Communications 10, Article number: 2638 (2019)
The properties of artificially grown thin films are strongly affected by surface processes during growth. Coherent X-rays provide an approach to better understand such processes and fluctuations far from equilibrium. Here we report results for vacuum
Externí odkaz:
http://arxiv.org/abs/1810.11585