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.
Articles
Bulk Fermi surface and momentum density in heavily doped La₂₋ₓSrₓCuO₄ using high-resolution Compton scattering and positron annihilation spectroscopies (with W. Al-Sawai, B. Barbiellini, Y. Sakurai, M. Itou, P. E. Mijnarends, R. S. Markiewicz, S. Kaprzyk, S. Wakimoto, M. Fujita, S. Basak, H. Lin, Yung Jui Wang, S. W. H. Eijt, H. Schut, and K. Yamada), Physics Faculty Publications (2012)
We have observed the bulk Fermi surface (FS) in an overdoped (x=0.3) single crystal of...
Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca₁₀(Pt₃As₈)(Fe₂As₂)₅ (with Madhab Neupane, Chang Liu, Su-Yang Xu, Yung-Jui Wang, Ni Ni, J. M. Allred, N. Alidoust, Hsin Lin, R. S. Markiewicz, R. J. Cava, and M. Z. Hasan), Physics Faculty Publications (2012)
We report a study of low-energy electronic structure and Fermi surface topology for the recently...
Reconstructing the bulk Fermi surface and superconducting gap properties from neutron scattering experiments (with Tanmoy Das and R. S. Markiewicz), Physics Faculty Publications (2012)
We develop an analytical tool to extract bulk electronic properties of unconventional superconductors from inelastic...
Coexisting pseudogap, charge-transfer-gap, and Mott-gap energy scales in the resonant inelastic x-ray scattering spectra of electron-doped cuprate superconductors (with Susmita Basak, Tanmoy Das, Hsin Lin, M. z. Hasan, and R. S. Markiewicz), Physics Faculty Publications (2012)
We present a computation of Cu K-edge resonant inelastic x-ray scattering (RIXS) spectra for electron-doped...
Spin texture on the warped Dirac-cone surface states in topological insulators (with Susmita Basak, Hsin Lin, L. A. Wray, S. Y. Xu, L. Fu, and M. Z. Hasan), Physics Faculty Publications (2011)
We have investigated the nature of surface states in the Bi₂Te₃ family of three-dimensional topological...