Enhanced Charge Order in a Photoexcited One-Dimensional Strongly Correlated System

Lu, Hantao; Sota, Shigetoshi; Matsueda, Hiroaki; Bonča, J.; Tohyama, Takami

doi:10.1103/physrevlett.109.197401

Cited by 43 publications

(48 citation statements)

References 31 publications

(39 reference statements)

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“…18 . Large width of the pump pulse t d leads to welltuned energy transfer between the pump pulse and the system.…”

Section: Resultsmentioning

confidence: 99%

“…For this purpose, we calculate the time-dependent optical conductivity of a 1D extended Hubbard model driven by a transient laser pulse. In this model, one can change the ground state from SDW phase to CDW phase by changing interaction parameters and tune the laser pulse so as to enhance charge correlation even within the SDW phase 18 . We find that photoinduced in-gap excitations appear in a different manner, depending on the nature of the initial ground state, i.e., SDW or CDW state.…”

Section: Introductionmentioning

confidence: 99%

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Photoinduced in-gap excitations in the one-dimensional extended Hubbard model

Shao

Bonča

et al. 2015

Phys. Rev. B

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We investigate time evolution of optical conductivity in the half-filled one-dimensional extended Hubbard model driven by a transient laser pulse, by using the time-dependent Lanczos method. Photoinduced in-gap excitations exhibit qualitatively different structure in the spin-density wave (SDW) in comparison to the charge-density wave (CDW) phase. In the SDW, the origin of a lowenergy in-gap excitation is attributed to even-odd parity of photoexcited states, while in the CDW an in-gap state is due to confined photo-generated carriers. The signature of the in-gap excitations can be identified as a characteristic oscillation in the time evolution of physical quantities.

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“…18 . Large width of the pump pulse t d leads to welltuned energy transfer between the pump pulse and the system.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoinduced in-gap excitations in the one-dimensional extended Hubbard model

Shao

Bonča

et al. 2015

Phys. Rev. B

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“…Other effects of the longer-range Coulomb interaction on the nonequilibrium dynamics have been studied in a one-dimensional chain using the time-dependent Lanczos method. There, a local enhancement of charge (spin) order [20,21] and an appearance of in-gap states [22] can be observed. The screening of charge carriers under nonequilibrium conditions has also been studied experimentally [23] and theoretically [24,25] in semiconducting materials.…”

Section: Introductionmentioning

confidence: 92%

Dynamics of screening in photodoped Mott insulators

2015

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We use a nonequilibrium implementation of extended dynamical mean-field theory in combination with a noncrossing approximation impurity solver to study the effect of dynamical screening in photoexcited Mott insulators. The insertion of doublons and holes adds low-energy screening modes and leads to a reduction of the Mott gap. The coupling to low-energy bosonic modes furthermore opens new relaxation channels and significantly speeds up the thermalization process. We also investigate the effect of the energy distribution of the photo doped carriers on the screening.

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“…Theoretical investigations of the photogenerated dynamics of organic compounds have also been reported [9][10][11][12][13][14][15][16][17][18] . Using a time-dependent Lanczos approach, the dynamics of (EDO-TTF) 2 PF 6 induced by a timedependent multi-cycle electrical field, studied the efficiency of the partial melting of the 2k F CO ground the state in the presence of different lattice potentials 12 .…”

Section: Introductionmentioning

confidence: 99%

Photoexcitation of electronic instabilities in one-dimensional charge-transfer systems

et al. 2014

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We investigate the real-time dynamics of photoexcited electronic instabilities in a charge-transfer system model, using the time-dependent density matrix renormalization group method. The model of choice was the quarter-filled one-dimensional extended Peierls-Hubbard Hamiltonian interacting with classical few-cycle electromagnetic radiation. The results show that only one electronic instability drives the main features of the photogenerated time-dependent behavior. Indeed, the photoresponse of the system shows a large enhancement of the 4kF (bond and charge) instability whereas the 2kF state remains largely unaffected. This conclusion holds regardless of the nature of the optical excitations and whether the system is perturbed resonantly or not. Our results suggest potential applications of charge-transfer systems with slow phononic dynamics as optoelectronic switching devices.

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Enhanced Charge Order in a Photoexcited One-Dimensional Strongly Correlated System

Cited by 43 publications

References 31 publications

Photoinduced in-gap excitations in the one-dimensional extended Hubbard model

Photoinduced in-gap excitations in the one-dimensional extended Hubbard model

Dynamics of screening in photodoped Mott insulators

Photoexcitation of electronic instabilities in one-dimensional charge-transfer systems

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