Correlation-assisted quantized charge pumping
Source abstract
Abstract
We investigate charge pumping in the vicinity of order-obstructed topological phases, i.e., symmetry-protected topological phases masked by spontaneous symmetry breaking in the presence of strong correlations. To explore this, we study a prototypical Su-Schrieffer-Heeger model with finite-range interaction that gives rise to orbital charge density wave order and characterize the impact of this order on the model's topological properties. In the ordered phase, where the many-body topological invariant loses quantization, we find that not only is quantized charge pumping still possible, but it is even assisted by the collective nature of the orbital charge density wave order. Remarkably, we show that the Thouless pump scenario may be used to uncover the underlying topology of order-obstructed phases.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Topological Materials and Phenomena · Advanced Condensed Matter Physics · Quantum many-body systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Physics Department, Stanford University, Stanford, California 94035, USA
Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
Institute of Theoretical Physics, Technische Universität Dresden, 01062 Dresden, Germany
Würzburg-Dresden Cluster of Excellence ct.qmat, 01062 Dresden, Germany
Department of Materials Science and Engineering, Stanford University, Stanford, California 94035, USA
Funding
U.S. Department of Energy · Basic Energy Sciences · Division of Materials Sciences and Engineering · Alexander von Humboldt-Stiftung · Deutsche Forschungsgemeinschaft
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