Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 46: Poster Session: Frustrated Magnets, Quantum Magnets, Charge Order and Complex Oxids

TT 46.13: Poster

Mittwoch, 18. März 2020, 15:00–19:00, P2/2OG

The repulsive interactions of the elastic quantum strings. — •Xue-Feng Zhang — Department of Physics, Chongqing University, Chongqing, 401331, China

The elastic quantum string is the quantum topological defects exist not only in the high-Tc superconductivity [1], but also in the frustrated system, such as the hard-core boson on the Kagome lattice [2,3], anisotropic triangular lattice [4] and spin half Ising model with long range interaction in the transverse magnetic field [5]. In this work, we study the repulsive interaction between effective closed strings defined on the bonds of the titled square lattice. By using the large-scale high accuracy exact diagonalization (ED) (error less than 10−28), we find the effective repulsive interactions between the strings are approximately exponential decaying with form V(r)≈exp(−kr2), where r is the distance between strings.
[1] B-X Zheng, et. al, Science 358, 1155 (2017)
[2] X.-F. Zhang, and S. Eggert, Phys. Rev. Lett. 111, 147201 (2013)
[3] X.-F. Zhang, Y.-C. He, S. Eggert, R. Moessner, and F. Pollmann Phys. Rev. Lett. 120, 115702 (2018)
[4] X.-F. Zhang, S.-J. Hu, A. Pelster and S. Eggert Phys. Rev. Lett. 117, 193201 (2016)
[5] Z. Zhou, Z. Yan, D.-X. Liu, Y. Chen and X.-F. Zhang ongoing work

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