Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 50: Poster Session: Correlated Electrons 2

TT 50.24: Poster

Mittwoch, 3. April 2019, 15:00–18:30, Poster D

Ground-state phase diagram of the frustrated spin-1/2 two-leg honeycomb ladder — Qiang Luo¹, Shijie Hu², Jize Zhao³, •Alexandros Metavitsiadis⁴, Sebastian Eggert², and Xiaoqun Wang^5,6 — ¹Department of Physics, Renmin University of China, Beijing 100872, China — ²Department of Physics and Research Center Optimas, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — ³Center for Interdisciplinary Studies, Lanzhou University, Lanzhou 730000, China — ⁴Institute for Theoretical Physics, Technical University Braunschweig, 38106 Braunschweig, Germany — ⁵Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), School of Physics and Astronomy, Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China — ⁶Collaborative Innovation Center for Advanced Microstructures, Nanjing 210093, China

We investigate a spin-1/2 two-leg honeycomb ladder with frustrating next-nearest-neighbor (NNN) coupling along the legs, which is equivalent to two J₁-J₂ spin chains coupled with J_⊥ at odd rungs. The full parameter region of the model is systematically studied using conventional and infinite density-matrix renormalization group as well as bosonization. We find a rich phase diagram consisting of five distinct phases. In addition, we fully analyze the universalities of the critical phase transitions.