• Thursday, April 28, 2016 - 1:00pm to 2:00pm  ·  Colloquium
    Dr Ningyu Liu


  • Friday, April 15, 2016 - 4:00pm to 5:00pm  ·  Colloquium
    Tracy Slayter, MIT

    Abstract: Dark matter is believed to comprise five-sixths of the matter in the universe, and is one of the strongest pieces of evidence for new fundamental physics. But dark matter does not interact directly with light, making it very difficult to detect except by its gravity. I will describe how dark matter collisions might produce high-energy particles observable by Earth-based telescopes, and how we can attempt to tease out those signals from the background.

  • Thursday, April 14, 2016 - 4:00pm to 5:00pm  ·  Colloquium
    Dr. Eric Grove

    Abstract:  Thunderstorms are nature's most powerful terrestrial particle accelerators.  The high-voltage, high-current electrical discharges of lightning are a familiar feature of a summer storm, but only recently have we come to learn that cloud-to-ground lightning strokes are accompanied by bursts of X-rays, that thunderstorms glow in gamma rays, and that storms occasionally produce intense flashes of gamma rays and launch charged particles into space at relativistic energies.

  • Friday, April 1, 2016 - 4:00pm to 5:00pm  ·  Colloquium
    Dr. Brant Carlson

    Abstract:  There is no shortage of puzzles in lightning physics.  Thanks to the development of high-bandwidth electronics, high-speed cameras, radiation detectors, and lightning triggering techniques, we now know of a veritable zoo of phenomena, from preliminary breakdown to stepped leader, from M-component to K-change, from corona flash to space stem,...  While some of these phenomena are well-understood, many remain puzzling and a unifying theory is not yet known.  I will talk about these phenomena and my efforts to understand them by modeling and data analysis, give deta

  • Tuesday, March 29, 2016 - 4:00pm to 5:00pm  ·  Colloquium
    Prof. Alan Nathan

    Abstract:  After reading Bob Adair's classic book The Physics of Baseball nearly 20 years ago, I thought I knew everything there was to know about the subject.  Since then I have learned much much more, due in large part to some superb tools that are now available.  These tools, which I will describe in the talk, allow detailed studies that were not available to Adair at the time he wrote his book.  The advances have come in two broad areas:  The aerodynamics of a baseball in flight and the physics of the ball-bat collision.  Not only have these advances furthered our under

  • Friday, January 29, 2016 - 4:00pm to 5:00pm  ·  Colloquium
    Chris Hersman, Johns Hopkins Applied Physics Laboratory

    Abstract: New Horizons is the first mission to Pluto and the Kuiper Belt. Launched on January 19, 2006, the spacecraft finally reached its closest distance to Pluto on July 14, 2015. Since completing the successful Pluto flyby, the spacecraft continues to downlink images and science data yielding weekly press releases of new discoveries. Chris Hersman, the New Horizons Mission Systems Engineer, will present images and data from the Pluto flyby and discuss events from the encounter including the July 4th anomaly. 

  • Thursday, December 3, 2015 - 4:00pm to 5:00pm  ·  Colloquium
    De Joshua A. Robinson of The Pennsylvania State University

    Abstract:  The last decade has seen nearly exponential growth in the science and technology of two-dimensional materials. Beyond graphene, there is a huge variety of layered materials that range in properties from insulating to superconducting. Furthermore, heterogeneous stacking of 2D materials also allows for additional “dimensionality” for band structure engineering. In this talk, I will discuss recent breakthroughs in two-dimensional atomic layer synthesis and properties, including novel 2D heterostructures and novel 2D nitrides.

  • Friday, November 20, 2015 - 4:00pm to 5:00pm  ·  Colloquium
    Darius Torchinsky

    Abstract: Essential to a microscopic understanding of strongly correlated materials is a clear picture of the relationship between their myriad quantum ground states. However, in phenomena ranging from unconventional magnetism to high temperature superconductivity, this picture is often obscured by the presence of broken symmetries hidden from view of existing experimental techniques. This may include hidden structural symmetries or tensor order parameters representing complex spatial arrangements of multipolar electric and magnetic moments.

  • Tuesday, March 3, 2015 - 1:00pm to 2:00pm  ·  Colloquium
    Dr. Jairo Velasco Jr., University of California at Berkeley

    Abstract: Graphene, a two-dimensional single atomic layer of carbon, has stimulated substantial interest because it is a rich model system for scientific exploration and a promising candidate for future electronics. I will discuss my studies on graphene-based transistors, which lead to the realization of new physical phenomena that is relevant for fundamental science and new device applications. The first part of my talk will focus on electron transport measurements of devices comprised of graphene bilayers.