The recent research interests of Professor Bansil have focused on questions concerning the electronic structure and spectroscopy of high-Tc superconductors and other complex materials. Professor Bansil's group has developed and implemented the theoretical methodology for carrying out first-principles calculations of spectral intensities relevant for angle-resolved photoemission and positron-annihilation angular correlation spectra in systems of the complexity of the high-Tc's within the framework of the conventional local-density-approximation. Approaches for a realistic treatment of effects of substitutions and of oxygen non-stoichometry on the electronic states in the high-Tc's have also been developed. An effort to decipher Fermi surface signatures as well as effects of electron-electron correlations via the high-resolution Compton scattering spectra is in progress. These investigations have yielded important new insights into the existence of Fermi surface, the nature of electronic states near the Fermi energy, as well as the mechanism of superconductivity in the high-Tc's. Professor Bansil's research effort involves extensive collaboration with groups within and outside United States. The following publications give an overview of recent highlights of the research program.

• "How different Fermi surface maps emerge in photoemission from Bi2212" M.C. Asensio, J. Avila, L. Roca, A. Tejeda, G.D. Gu, M. Lindroos, R.S. Markiewicz, A. Bansil Phys. Rev. B67, 014519 (2003)
• "Electron momentum density in Cu0.9Al0.1" M. Samsel-Czekala, G. Kontrym-Sznajd, G. Doring, W. Schulke, J. Kwiatkowska, F. Maniawski, S. Kaprzyk, A. Bansil Applied Physics A 76, 87(2003)
• "Spontaneous Magnetization and Electron Momentum Density in 3D Quantum Dots" R. Saniz, B. Barbiellini, A. B. Denison, A. Bansil Phys. Rev. B68, 165326 (2003).
• "Compton scattering beyond the impulse approximation" I. G. Kaplan, B. Barbiellini, A. Bansil Phys. Rev. B68, 235104 (2003)
• "Site-selectivity properties of the angle-resolved photoemission matrix element Bi2Sr2CaCu2O8" S. Sahrakorpi, M. Lindroos and A. Bansil Phys. Rev. B68, 054522 (2003)