Stable diagonal stripes in the t-J model at \n_h=1/8 doping from\n fPEPS calculations

2019/08/26 by Shaojun Dong, Chao Wang, Dong, Shao-Jun +8 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.1908.10000

openalex publication_date 2019/08/26 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28

Abstract

We investigate the 2D t-J model at a hole doping of \n_h=1/8 using\nrecently developed high accuracy fermionic projected entangled pair\nstates(fPEPS) method. By applying stochastic gradient descent method combined\nwith Monte Carlo sampling technique, we obtain the ground state hole energy\nE _{rm hole}=-1.6186 for J/t=0.4. We show that the ground state has stable\ndiagonal stripes instead of vertical stripes with width of 4 unit cells, and\nstripe filling \ρ_l=0.5. We further show that the long range\nsuperconductivity order is suppressed at this point.\n

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