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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 ladderQiang Luo1, Shijie Hu2, Jize Zhao3, •Alexandros Metavitsiadis4, Sebastian Eggert2, and Xiaoqun Wang5,61Department 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.

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