Speaker
Description
Stripe order and its intricate relationship with high-temperature superconductivity remain central puzzles in strongly correlated electron systems. In this talk, I synthesize recent theoretical advances illuminating this relationship on the basis of two complementary studies. The first, leveraging modern tensor network simulations, demonstrates that in the two-dimensional Fermi Hubbard model, enhanced charge susceptibility near 1/8 hole doping arises from transient clustering of charge carriers—pointing to a precursor state where phase separation is forestalled by the eventual emergence of stripe order. The second study dives into the superconducting ground state within stripe-ordered phases, revealing via density matrix renormalization group methods that Cooper pair condensation is inherently fragmented: multiple macroscopically occupied condensates localize along the stripes and hybridize into a collective quantum state across the system. Together, these results highlight how fluctuations between charge clustering, stripe order, and unconventional superconductivity give rise to the rich phase behavior in cuprate-like models. This new perspective advances our understanding of the origin of the strange metal and pseudogap regimes, and offers fresh insights into the nature of pairing and long-range order in strongly correlated materials.
