Speakers

View Full Calendar

Institute for Condensed Matter Theory Seminar: "Quantum Monte Carlo studies of normal state properties of the Hubbard model""

Event Type
Seminar/Symposium
Sponsor
The Physics Department
Location
190 ESB
Date
Sep 23, 2019   12:00 pm  
Speaker
Edwin Huang, University of Illinois Urbana Champaign
Views
32
Originating Calendar
Physics - The Anthony J Leggett Institute for Condensed Matter Theory Seminar

Many of the outstanding challenges in understanding strongly correlated quantum matter stem from their unusual behavior in the normal state. We investigate this topic from the perspective of numerical simulations of paradigmatic model Hamiltonians. In the first part of my talk, I will present large scale determinantal quantum Monte Carlo (DQMC) and density matrix renormalization group (DMRG) calculations demonstrating fluctuating spin stripes in both the Hubbard and Emery models on a 2d square lattice. Our results provide new perspectives for the phenomenology of high-Tc cuprate superconductors. In the second part, I will discuss transport properties of the 2d Hubbard model evaluated by analytic continuation of DQMC data. Our data, extending to temperatures around an order of magnitude below the Fermi temperature, show features reminiscent of the strange metal phase observed in unconventional superconductors, including linear-T dependence and violation of the Mott-Ioffe-Regel limit.

Many of the outstanding challenges in understanding strongly correlated quantum matter stem from their unusual behavior in the normal state. We investigate this topic from the perspective of numerical simulations of paradigmatic model Hamiltonians. In the first part of my talk, I will present large scale determinantal quantum Monte Carlo (DQMC) and density matrix renormalization group (DMRG) calculations demonstrating fluctuating spin stripes in both the Hubbard and Emery models on a 2d square lattice. Our results provide new perspectives for the phenomenology of high-Tc cuprate superconductors. In the second part, I will discuss transport properties of the 2d Hubbard model evaluated by analytic continuation of DQMC data. Our data, extending to temperatures around an order of magnitude below the Fermi temperature, show features reminiscent of the strange metal phase observed in unconventional superconductors, including linear-T dependence and violation of the Mott-Ioffe-Regel limit.

link for robots only