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  4. Spin, Charge, and ?-Spin Separation in One-Dimensional Photodoped Mott Insulators
 
research article

Spin, Charge, and ?-Spin Separation in One-Dimensional Photodoped Mott Insulators

Murakami, Yuta
•
Takayoshi, Shintaro
•
Kaneko, Tatsuya
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March 10, 2023
Physical Review Letters

We show that effectively cold metastable states in one-dimensional photodoped Mott insulators described by the extended Hubbard model exhibit spin, charge, and q-spin separation. Their wave functions in the large on-site Coulomb interaction limit can be expressed as IW) = IWcharge)IWspin)IWq-spin), which is analogous to the Ogata-Shiba states of the doped Hubbard model in equilibrium. Here, the q-spin represents the type of photo-generated pseudoparticles (doublon or holon). IWcharge) is determined by spinless free fermions, IWspin) by the isotropic Heisenberg model in the squeezed spin space, and IWq-spin) by the XXZ model in the squeezed q-spin space. In particular, the metastable q-pairing and charge-density-wave (CDW) states correspond to the gapless and gapful states of the XXZ model. The specific form of the wave function allows us to accurately determine the exponents of correlation functions. The form also suggests that the central charge of the q-pairing state is 3 and that of the CDW phase is 2, which we numerically confirm. Our study provides analytic and intuitive insights into the correlations between active degrees of freedom in photodoped strongly correlated systems.

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Type
research article
DOI
10.1103/PhysRevLett.130.106501
Web of Science ID

WOS:000992692800005

Author(s)
Murakami, Yuta
Takayoshi, Shintaro
Kaneko, Tatsuya
Lauchli, Andreas M.
Werner, Philipp  
Date Issued

2023-03-10

Publisher

AMER PHYSICAL SOC

Published in
Physical Review Letters
Volume

130

Issue

10

Article Number

106501

Subjects

Physics, Multidisciplinary

•

Physics

•

light-induced superconductivity

•

critical exponents

•

hubbard-model

•

transitions

•

state

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCSA  
Available on Infoscience
June 19, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/198457
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