We have been very fortunate to have had many excellent collaborators over the years, from a variety of fields.

More recent ones include:

High T_c Superconductor sample providers:

Hiroshi Eisaki, Yoshihiro Aiura, Y. Yamaguchi, K. Oka,  AIST Tsukuba, Japan

Yoichi Ando, CRIEPI, Tokyo, Japan

Doug Bonn, University of British Columbia, Canada

Colossal Magnetoresistive Oxide sample providers

Yoshinori Tokura, Tsuyoshi Kimura, Yutaka Moritomo,  AIST, Tsukuba and University of Tokyo, Japan

John Mitchell and Helen Zheng, Argonne National Labs, USA

Sample providers - other materials:

Dave Mandrus and Rongying Jin, Oak Ridge National Labs, Oak Ridge, Tennessee

Martin Dressel, University of Stuttgart, Germany

Theoretical Calculations of Photoemission matrix element effects:

Arun Bansil, Seppo Sahrakorpi,  Northeastern University, Boston, MA

Matti Lindroos, Tampere University, Finland

Laser Development and Spectroscopy

Steven Cundiff and Elaine Li, University of Colorado and JILA

Margaret Murnane and Henry Kapteyn, University of Colorado and JILA

Jun Ye and Jason Jones, University of Colorado and JILA

Photoelectron Spectroscopy and Synchrotron Instrumentation Development

Alexei Fedorov, Yi-De Chuang, and Zahid Hussain, Advanced Light Source, Lawrence Berkeley Labs, Berkeley, CA

Zhi-Xun Shen, Xinjiang Zhou, and Wanli Yang, Stanford University and the Advanced Light Source, Stanford, CA