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Creators/Authors contains: "Chen, Lei"

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  1. ; ; (, Nature Physics)
    Free, publicly-accessible full text available December 1, 2025
  2. ; (, Geometriae Dedicata)
    Free, publicly-accessible full text available September 20, 2025
  3. ; ; ; ; ; (, Physical Review Research)
    There is extensive current interest in electronic topology in correlated settings. In strongly correlated systems, contours of Green's function zeros may develop in frequency-momentum space, and their role in correlated topology has increasingly been recognized. However, whether and how the zeros contribute to electronic properties is a matter of uncertainty. Here we address the issue in an exactly solvable model for a Mott insulator. We show that the Green's function zeros contribute to several physically measurable correlation functions in a way that does not run into inconsistencies. In particular, the physical properties remain robust to chemical potential variations up to the Mott gap, as it should be based on general considerations. Our work sets the stage for further understandings of the rich interplay among topology, symmetry, and strong correlations. Published by the American Physical Society2024 
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    Free, publicly-accessible full text available September 1, 2025
  4. ; ; ; (, Journal of Materials Chemistry A)
    By tuning the composition of the non-solvent bath used in the non-solvent induced phase inversion process for fabricating thick and low-tortuosity battery electrodes, optimal electrochemical performances and compressive modulus were achieved. 
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    Free, publicly-accessible full text available July 9, 2025
  5. ; ; ; ; ; ; ; (, Physical Review Research)
    Lattice symmetries are central to the characterization of electronic topology. Recently, it was shown that Green's function eigenvectors form a representation of the space group. This formulation has allowed the identification of gapless topological states even when quasiparticles are absent. Here we demonstrate the profundity of the framework in the extreme case, when interactions lead to a Mott insulator, through a solvable model with long-range interactions. We find that both Mott poles and zeros are subject to the symmetry constraints, and relate the symmetry-enforced spectral crossings to degeneracies of the original noninteracting eigenstates. Our results lead to new understandings of topological quantum materials and highlight the utility of interacting Green's functions toward their symmetry-based design. Published by the American Physical Society2024 
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    Free, publicly-accessible full text available July 1, 2025
  6. ; (, Michigan Mathematical Journal)
    Abstract. In this paper, we study the algebraic structure of mapping class group Mod(X) of 3-manifolds X that fiber as a circle bundle over a surface S1 → X → Sg. There is an exact sequence 1→H1(Sg)→Mod(X)→Mod(Sg)→1. We relate this to the Birman exact sequence and determine when this sequence splits. 
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  7. ; ; ; ; ; ; ; ; ; ; et al (, USENIX Association)
    Free, publicly-accessible full text available July 10, 2025
  8. ; ; ; ; ; ; ; ; ; ; et al (, USENIX Association)
    Free, publicly-accessible full text available July 10, 2025
  9. ; ; ; ; ; ; ; ; ; ; et al (, USENIX Association)
    Free, publicly-accessible full text available July 8, 2025
  10. ; ; ; ; ; ; ; ; ; ; et al (, USENIX Association)
    Free, publicly-accessible full text available July 4, 2025