Hund’s coupling driven photocarrier relaxation in the two-band Mott insulator
نویسندگان
چکیده
Hugo U. R. Strand,1,2,* Denis Golež,2 Martin Eckstein,3 and Philipp Werner2,† 1Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland 2Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland 3Department of Physics, University of Erlangen-Nürnberg, 91058 Erlangen, Germany (Received 21 April 2017; revised manuscript received 4 August 2017; published 3 October 2017)
منابع مشابه
Observation of a metal-to-insulator transition with both Mott-Hubbard and Slater characteristics in Sr2IrO4 from time-resolved photocarrier dynamics
We perform a time-resolved optical study of Sr2IrO4 to understand the influence of magnetic ordering on the low energy electronic structure of a strongly spin-orbit coupled Jeff = 1/2Mott insulator. By studying the recovery dynamics of photoexcited carriers, we find that upon cooling through the Néel temperature TN the system evolves continuously from a metal-like phase with fast (∼50 fs) and e...
متن کاملInterplay of Mott transition and ferromagnetism in the orbitally degenerate Hubbard model
A slave-boson representation for the degenerate Hubbard model is introduced. The location of the metalto-insulator transition that occurs at commensurate densities is shown to depend weakly on the band degeneracy M . The relative weights of the Hubbard subbands depend strongly on M , as well as the magnetic properties. It is also shown that a sizable Hund’s rule coupling is required in order to...
متن کاملCorrelation-driven charge order at the interface between a Mott and a band insulator.
To study digital Mott insulator LaTiO3 and band insulator SrTiO3 interfaces, we apply correlated band theory within the local density approximation including a Hubbard U to (n, m) multilayers, 1<or=n, m<or=9 using unit cells with larger lateral periodicity. If the on-site repulsion on Ti is big enough to model the Mott insulating behavior of undistorted LaTiO3, the charge imbalance at the inter...
متن کاملSlave-boson theory of the Mott transition in the two-band Hubbard model
We apply the slave-boson approach of Kotliar and Ruckenstein to the two-band Hubbard model with an Ising like Hund’s rule coupling and bands of different widths. On the mean-field level of this approach we investigate the Mott transition and observe both separate and joint transitions of the two bands depending on the choice of the interand intraorbital Coulomb interaction parameters. The meanf...
متن کاملThe Orbital Selective Mott Transition in a Three Band Hubbard model: a Slave Boson Mean Field Study
Abstract In the present paper, we systematically studied the possible Orbital selective Mott transition (OSMT) in the t2g system, which has three orbital degeneracy. The slave Boson mean field theory is generalized to the three band systems with full Hund’s rule coupling including spin flip and pair hopping terms. A new type of Mott transition which is driven by the crystal field splitting or t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2017