8 papers · 1 filter
Conductivity and Spin Susceptibility for the Disordered 2D Hubbard Model
Kohjiro Kobayashi, Byounghak Lee, Nandini Trivedi
The effect of disorder on a class of transition metal oxides described by a single orbital Hubbard model at half filling is investigated. The phases are characterized by the nature…
Competition between antiferromagnetism and superconductivity, electron-hole doping asymmetry and "Fermi Surface" topology in cuprates
Sandeep Pathak, Vijay B. Shenoy, Mohit Randeria +1
We investigate the asymmetry between electron and hole doping in a 2D Mott insulator, and the resulting competition between antiferromagnetism (AF) and d-wave superconductivity (SC…
Strong correlations lead to protected low energy excitations in disordered d-wave superconductors
Arti Garg, Mohit Randeria, Nandini Trivedi
We show that strong correlations play a vital role in protecting low energy excitations in disordered high temperature superconductors. The impurity-induced low-energy density of s…
Resonant Pair Exchange and Percolation in the Disordered Hubbard Model
Dariush Heidarian, Mustansir Barma, Nandini Trivedi
We show that the effect of disorder on a Mott-Hubbard insulator of interacting electrons produces a quantum phase transition from an antiferromagnetic to a paramagnetic phase gover…
Double-Exchange Model: Phase Diagram at Zero-Temperature
David Pekker, Swagatam Mukhopadhyay, Nandini Trivedi +1
The analytical zero-temperature phase diagram of the double exchange model for classical background spins as a function of the carrier density and Hund's coupling in the entire ran…
Particle-Hole Asymmetry in Doped Mott Insulators: Implications for Tunneling and Photoemission Spectroscopies
Mohit Randeria, Rajdeep Sensarma, Nandini Trivedi +1
In a system with strong local repulsive interactions it should be more difficult to add an electron than to extract one. We make this idea precise by deriving various exact sum rul…