Bulletin of the American Physical Society
2008 APS March Meeting
Volume 53, Number 2
Monday–Friday, March 10–14, 2008; New Orleans, Louisiana
Session S4: Keithley Award Symposium |
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Sponsoring Units: GIMS Chair: James Matey, Sarnoff Corporation Room: Morial Convention Center 206 |
Wednesday, March 12, 2008 2:30PM - 3:06PM |
S4.00001: Keithly Award Talk: Pushing the limits in ARPES Invited Speaker: A successively higher degree of parallelity in data acquisition has dramatically increased the information rate in angle resolved photoelectron spectroscopy (ARPES). This has been coupled to resolution improvements both in angle and energy. The development leading to the present state of the art is described, and recent results are presented. To extend the field further towards higher or lower energies, as well as higher resolution or larger acceptance angles, novel techniques are needed. Some recent and ongoing developments for this purpose will be described. It is also shown that the application of these techniques can be used to overcome some limitations in energy resolution even when the angular information as such is not important. [Preview Abstract] |
Wednesday, March 12, 2008 3:06PM - 3:42PM |
S4.00002: Invited Speaker: |
Wednesday, March 12, 2008 3:42PM - 4:18PM |
S4.00003: High Resolution Angle-Resolved Photoemission Studies of Correlated Electron Systems Invited Speaker: Bjorn Wannberg's invention of the ``angle mode'' for acquiring 2-dimensional ARPES images with both high energy and angular resolution has revolutionized the way modern ARPES experiments are performed. This advance has lead to both quantitative and qualitative improvements in the resolution as well as collection efficiency. In this talk I will give a few key examples of what has become possible using this new technology for the study of correlated electron systems. Particular focus is on high Tc superconductors, including a 'fingerprinting' of electron-boson couplings using the isotope effect, and recent data on colossal magnetoresistive oxides which shows the critical aspect of the orbital degrees of freedom and k-dependent electron self energies. [Preview Abstract] |
Wednesday, March 12, 2008 4:18PM - 4:54PM |
S4.00004: Angle-Resolved Photoemission Study of High Temperature Superconductors Invited Speaker: As a hybrid of spectroscopy and scattering experiments, angle-resolved photoemission spectroscopy reveals the direction, the speed, and the scattering mechanism of valence electrons.~ In the past two decades, enormously improved resolution and carefully matched experiments have elevated this technique to an important many-body spectroscopy. Today, ARPES experiments help setting the intellectual agenda by testing new ideas, discovering surprises, and challenging orthodoxies. This technique is at the focal point of the necessary debates leading to new paradigms of physics represented by the high temperature superconductors. In this talk, we will survey the progress of this field over the last two decades and the information we gained about the high temperature superconductors. However, the focus will be the latest ARPES data on the following subjects: i) New temperature and doping dependent data that provide insights on the relationship between pseudogap and superconducting gap; ii) New data on the Fermi surface dependent pairing and many-body interactions in self-doped multilayer cuprates. If time permits, we will also present new time resolved photoemission data from charge density wave systems. [Preview Abstract] |
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