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Nonequilibrium optical response of a one-dimensional Mott insulator

Journal Article · · Physical Review. B
 [1];  [2]
  1. Universidad del Rosario, Bogota (Colombia); OSTI
  2. Northeastern Univ., Boston, MA (United States)
We define, compute, and analyze the nonequilibrium differential optical conductivity of the one-dimensional extended Hubbard model at half-filling after applying a pump pulse, using the time-dependent density matrix renormalization group method. The melting of the Mott insulator is accompanied by a suppression of the local magnetic moment and ensuing photogeneration of doublon-holon pairs. The differential optical conductivity reveals (i) mid-gap states related to parity-forbidden optical states and (ii) strong renormalization and hybridization of the excitonic resonance and the absorption band, yielding a Fano resonance. We offer evidence and interpret such a resonance as a signature of nonequilibrium optical excitations resembling excitonic strings, (bi)excitons, and unbound doublon-holon pairs, depending on the magnitude of the intersite Coulomb repulsion. We discuss our results in the context of pump and probe spectroscopy experiments on organic Mott insulators.
Research Organization:
Northeastern University, Boston, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0014407
OSTI ID:
1851916
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 8 Vol. 104; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (50)

Pressure dependent relaxation in the photo-excited Mott insulator ETF2TCNQ: Influence of hopping and correlations on quasiparticle recombination rates text January 2013
The density-matrix renormalization group in the age of matrix product states journal January 2011
Time-evolution methods for matrix-product states journal December 2019
Mott transition by an impulsive dielectric breakdown journal August 2017
Towards properties on demand in quantum materials journal October 2017
Resonant and nonresonant control over matter and light by intense terahertz transients journal August 2013
Quantum interference between charge excitation paths in a solid-state Mott insulator journal December 2010
Theoretical understanding of photon spectroscopies in correlated materials in and out of equilibrium journal August 2018
Biexciton in one-dimensional Mott insulators journal October 2019
Observation of suppressed terahertz absorption in photoexcited graphene journal March 2013
Ultrafast spectroscopy of quantum materials journal September 2012
Optical absorption of non-interacting tight-binding electrons in a Peierls-distorted chain at half band-filling journal January 1997
Exact results for the optical absorption of strongly correlated electrons in a half-filled Peierls-distorted chain journal January 1997
Optical absorption of strongly correlated half-filled Mott-Hubbard chains journal January 1997
Emergent ultrafast phenomena in correlated oxides and heterostructures journal January 2017
Time-dependent density-matrix renormalization-group using adaptive effective Hilbert spaces journal April 2004
Effects of Configuration Interaction on Intensities and Phase Shifts journal December 1961
Effective model of one-dimensional extended Hubbard systems: Application to linear optical spectrum calculations in large systems based on many-body Wannier functions journal December 2019
Detecting superconductivity out of equilibrium journal May 2020
Density-matrix algorithms for quantum renormalization groups journal October 1993
Excitons and optical absorption in one-dimensional extended Hubbard models with short- and long-range interactions journal December 1997
Optical response in one-dimensional Mott insulators journal August 2001
Excitons in one-dimensional Mott insulators journal September 2001
Optical excitations in a one-dimensional Mott insulator journal February 2003
Temperature dependence of spinon and holon excitations in one-dimensional Mott insulators journal August 2005
Theory of time-resolved optical spectroscopy on correlated electron systems journal November 2008
Optical response of highly excited particles in a strongly correlated system journal March 2014
Coherent dynamics of photoinduced phase formation in a strongly correlated organic crystal journal April 2014
Photoexcitation of electronic instabilities in one-dimensional charge-transfer systems journal October 2014
Photoinduced in-gap excitations in the one-dimensional extended Hubbard model journal June 2015
Dynamics of screening in photodoped Mott insulators journal November 2015
Exciton recombination in one-dimensional organic Mott insulators journal November 2015
Numerical method to compute optical conductivity based on pump-probe simulations journal May 2016
Thermalization after photoexcitation from the perspective of optical spectroscopy journal July 2016
Photoinduced Hund excitons in the breakdown of a two-orbital Mott insulator journal June 2018
Excitons in the One-Dimensional Hubbard Model: A Real-Time Study journal April 2008
Spectral Properties near the Mott Transition in the One-Dimensional Hubbard Model journal August 2010
Photoinduced States in a Mott Insulator journal March 2013
Ultrafast Charge Recombination in a Photoexcited Mott-Hubbard Insulator journal July 2013
Pressure-Dependent Relaxation in the Photoexcited Mott Insulator ET – F 2 TCNQ : Influence of Hopping and Correlations on Quasiparticle Recombination Rates journal March 2014
Trion-Induced Negative Photoconductivity in Monolayer MoS 2 journal October 2014
Density matrix formulation for quantum renormalization groups journal November 1992
Optical Conductivity of the Half-Filled Hubbard Chain journal October 2000
Real-Time Evolution Using the Density Matrix Renormalization Group journal August 2004
Direct Observation of Excitons and a Continuum of One-Dimensional Mott Insulators: A Reflection-Type Third-Harmonic-Generation Study of Ni-Halogen Chain Compounds journal August 2005
Photoinduced Metallic State Mediated by Spin-Charge Separation in a One-Dimensional Organic Mott Insulator journal January 2007
The density-matrix renormalization group journal April 2005
Ultrafast Photoconversion from Charge Density Wave State to Mott–Hubbard State in One-Dimensional Extended Peierls–Hubbard System of Br-Bridged Pd Compound journal December 2006
Dynamics and Control in Complex Transition Metal Oxides journal July 2014
Quantum quenches, linear response and superfluidity out of equilibrium journal July 2014