TY - JOUR
T1 - Ground-state phase diagram of the one-dimensional t-Js-Jτ model at quarter filling
AU - Kurebayashi, Yuya
AU - Oshiyama, Hiroki
AU - Shibata, Naokazu
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant No. JP19K03708.
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/4/14
Y1 - 2021/4/14
N2 - We study the ground state of the one-dimensional "t-Js-Jτ model,"which is a variant of the t-J model with an additional channel degree of freedom. The model is not only a generalization of the t-J model but also an effective model of the two-channel Kondo lattice model in the strong-coupling region. The low-energy excitations and correlation functions are systematically calculated by the density matrix renormalization group method, and the ground-state phase diagram at quarter filling consisting of a Tomonaga-Luttinger liquid, spin-gap state, channel-gap state, insulator, and phase separation is determined. We find that weak channel fluctuations stabilize the spin-gap state, while strong channel fluctuations lead to the transition to the insulator.
AB - We study the ground state of the one-dimensional "t-Js-Jτ model,"which is a variant of the t-J model with an additional channel degree of freedom. The model is not only a generalization of the t-J model but also an effective model of the two-channel Kondo lattice model in the strong-coupling region. The low-energy excitations and correlation functions are systematically calculated by the density matrix renormalization group method, and the ground-state phase diagram at quarter filling consisting of a Tomonaga-Luttinger liquid, spin-gap state, channel-gap state, insulator, and phase separation is determined. We find that weak channel fluctuations stabilize the spin-gap state, while strong channel fluctuations lead to the transition to the insulator.
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U2 - 10.1103/PhysRevB.103.165115
DO - 10.1103/PhysRevB.103.165115
M3 - Article
AN - SCOPUS:85104441100
VL - 103
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 16
M1 - 165115
ER -