Nonlocal correlations in the orbital selective Mott phase of a one-dimensional multiorbital Hubbard model
Abstract
Here, we study nonlocal correlations in a three-orbital Hubbard model defined on an extended one-dimensional chain using determinant quantum Monte Carlo and density matrix renormalization group methods. We focus on a parameter regime with robust Hund's coupling, which produces an orbital selective Mott phase (OSMP) at intermediate values of the Hubbard U, as well as an orbitally ordered ferromagnetic insulating state at stronger coupling. An examination of the orbital- and spin-correlation functions indicates that the orbital ordering occurs before the onset of magnetic correlations in this parameter regime as a function of temperature. In the OSMP, we find that the self-energy for the itinerant electrons is momentum dependent, indicating a degree of nonlocal correlations while the localized electrons have largely momentum independent self-energies. These nonlocal correlations also produce relative shifts of the holelike and electronlike bands within our model. The overall momentum dependence of these quantities is strongly suppressed in the orbitally ordered insulating phase.
- Authors:
-
[4];
- The Univ. of Tennessee, Knoxville, TN (United States)
- The Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1376329
- Alternate Identifier(s):
- OSTI ID: 1335198
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 23; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Li, S., Kaushal, N., Wang, Y., Tang, Y., Alvarez, G., Nocera, Alberto, Maier, T. A., Dagotto, E., and Johnston, S. Nonlocal correlations in the orbital selective Mott phase of a one-dimensional multiorbital Hubbard model. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.235126.
Li, S., Kaushal, N., Wang, Y., Tang, Y., Alvarez, G., Nocera, Alberto, Maier, T. A., Dagotto, E., & Johnston, S. Nonlocal correlations in the orbital selective Mott phase of a one-dimensional multiorbital Hubbard model. United States. https://doi.org/10.1103/PhysRevB.94.235126
Li, S., Kaushal, N., Wang, Y., Tang, Y., Alvarez, G., Nocera, Alberto, Maier, T. A., Dagotto, E., and Johnston, S. Mon .
"Nonlocal correlations in the orbital selective Mott phase of a one-dimensional multiorbital Hubbard model". United States. https://doi.org/10.1103/PhysRevB.94.235126. https://www.osti.gov/servlets/purl/1376329.
@article{osti_1376329,
title = {Nonlocal correlations in the orbital selective Mott phase of a one-dimensional multiorbital Hubbard model},
author = {Li, S. and Kaushal, N. and Wang, Y. and Tang, Y. and Alvarez, G. and Nocera, Alberto and Maier, T. A. and Dagotto, E. and Johnston, S.},
abstractNote = {Here, we study nonlocal correlations in a three-orbital Hubbard model defined on an extended one-dimensional chain using determinant quantum Monte Carlo and density matrix renormalization group methods. We focus on a parameter regime with robust Hund's coupling, which produces an orbital selective Mott phase (OSMP) at intermediate values of the Hubbard U, as well as an orbitally ordered ferromagnetic insulating state at stronger coupling. An examination of the orbital- and spin-correlation functions indicates that the orbital ordering occurs before the onset of magnetic correlations in this parameter regime as a function of temperature. In the OSMP, we find that the self-energy for the itinerant electrons is momentum dependent, indicating a degree of nonlocal correlations while the localized electrons have largely momentum independent self-energies. These nonlocal correlations also produce relative shifts of the holelike and electronlike bands within our model. The overall momentum dependence of these quantities is strongly suppressed in the orbitally ordered insulating phase.},
doi = {10.1103/PhysRevB.94.235126},
journal = {Physical Review B},
number = 23,
volume = 94,
place = {United States},
year = {Mon Dec 12 00:00:00 EST 2016},
month = {Mon Dec 12 00:00:00 EST 2016}
}
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- Nature Communications, Vol. 9, Issue 1
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