Truncated-Unity Functional Renormalization Group for Multiband Systems With Spin-Orbit Coupling

Frontiers in Physics

Ehrlich, Jannis¹  Schober, Giulio A. H.¹  Reckling, Timo²  Honerkamp, Carsten⁵ 

[1] Institute for Theoretical Solid State Physics, RWTH Aachen University, Aachen, Germany;Peter Grülich, Germany;lich, Jünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jü

关键词: functional renormalization group;    Interacting fermions;    high-performance computing;    Multiband systems;    Spin-orbit coupling;    Quantum Materials;   

DOI  :  10.3389/fphy.2018.00032

学科分类：物理（综合）

来源: Frontiers

【 摘 要 】

Although the functional renormalization group (fRG) is by now a well-established method for investigating correlated electron systems, it is still undergoing significant technical and conceptual improvements. In particular, the motivation to optimally exploit the parallelism of modern computing platforms has recently led to the development of the "truncated-unity" functional renormalization group (TU-fRG). Here, we review this fRG variant, and we provide its extension to multiband systems with spin-orbit coupling. Furthermore, we discuss some aspects of the implementation and outline opportunities and challenges ahead for predicting the ground-state ordering and emergent energy scales for a wide class of quantum materials.

【 授权许可】

CC BY