192 citations · 2.6k across the 109 of their papers we have counts for
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Projective symmetry determined topology in flux Su-Schrieffer-Heeger model
Gang Jiang, Z. Y. Chen, S. J. Yue +4
In the field of symmetry-protected topological phases, a common wisdom is that the symmetries fix the topological classifications, but they alone cannot determine whether a system…
Making topologically trivial non-Hermitian systems nontrivial via gauge fields
W. B. Rui, Y. X. Zhao, Z. D. Wang
Non-Hermiticity significantly enriches the concepts of symmetry and topology in physics. Particularly, non-Hermiticity gives rise to the ramified symmetries, where the non-Hermitia…
Projective Spacetime Symmetry of Spacetime Crystals
Zheng Zhang, Z. Y. Chen, Y. X. Zhao
Wigner's seminal work on the Poincaré group revealed one of the fundamental principles of quantum theory: symmetry groups are projectively represented. The condensed-matter counter…
General Theory of Momentum-Space Nonsymmorphic Symmetry
Chen Zhang, Z. Y. Chen, Zheng Zhang +1
As a fundamental concept of all crystals, space groups are partitioned into symmorphic groups and nonsymmorphic groups. Each nonsymmorphic group contains glide reflections or screw…
Stiefel-Whitney topological charges in a three-dimensional acoustic nodal-line crystal
Haoran Xue, Z. Y. Chen, Zheyu Cheng +4
Band topology of materials describes the extent Bloch wavefunctions are twisted in momentum space. Such descriptions rely on a set of topological invariants, generally referred to…
Upper bound of a band complex
Si Li, Zeying Zhang, Xukun Feng +5
Band structure for a crystal generally consists of connected components in energy-momentum space, known as band complexes. Here, we explore a fundamental aspect regarding the maxim…
Classification of time-reversal-invariant crystals with gauge structures
Z. Y. Chen, Zheng Zhang, Shengyuan A. Yang +1
A peculiar feature of quantum states is that they may embody so-called projective representations of symmetries rather than ordinary representations. Projective representations of…