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10 papers · 1 filter
Small-Scale Mixing of the Elements
Bruce G. Elmegreen
The progressive mixing and contamination of interstellar gas by supernovae and other processes following the passage of a spiral density wave is reviewed, with an emphasis on the S…
Observations and Theory of Dynamical Triggers for Star Formation
B. G. Elmegreen
Star formation triggering mechanisms are reviewed, including the direct compression of clouds and globules, the compression and collapse of molecular clouds at the edges of HII reg…
HI Observations of the Spiral Arm Pattern Speed in the Late-Type Barred Galaxy NGC 925
Bruce G. Elmegreen, Eric Wilcots, D. J. Pisano
HI observations with the VLA of the late-type barred galaxy NGC 925 show clear streaming motions along four spiral arms close to the minor axis. A transition from inward streaming…
Magnetic imaging of the paramagnetic Meissner effect in the granular high-Tc superconductor Bi2Sr2CaCu2Ox
J. R. Kirtley, A. C. Mota, M. Sigrist +1
We have imaged the spatial distribution of magnetic flux on a granular sample of the high-temperature superconductor Bi2Sr2CaCu2Ox using a scanning SQUID microscope. Our results es…
Absence of Localization in Certain Field Effect Transistors
S Washburn, D Popovic, KP Li +1
We review some experimental and theoretical results on the metal-to-insulator transition (MIT) observed at zero magnetic field (B=0) in several two-dimensional electron systems (2D…
Metal-Insulator Transition in a Low-Mobility Two-Dimensional Electron System
Dragana Popovic, A. B. Fowler, S. Washburn
We have varied the disorder in a two-dimensional electron system in silicon by applying substrate bias. When the disorder becomes sufficiently low, we observe the emergence of the…