3 papers
cond-mat.mtrl-sci2026
The Locality Cost of Fully Flat Hopf Insulators
Feng Liu, Qifeng Liang, Wenlong Gao
Hopf topology permits a strictly finite-range Hamiltonian with one exactly flat topological band. We prove, however, that extending flatness to the complete two-band spectrum neces…
physics.optics2026
Field-driven helicity in solid-state high-harmonic generation
Carlos Batista, Jean Paul Menotti, Dasol Kim +4
The polarization state of light plays a central role in strong-field light--matter interactions and is widely used to probe electronic structure in solids via high-order harmonic g…
cond-mat.supr-con2024
Band-Structure-Independent Topology from Nonsymmorphic Wannier Complexes
Qinghua He, Jie Zhang, Shengdan Tao +4
Nonsymmorphic symmetries can enforce band connectivity that obstructs a single-band Wannier description. We show that a fractional translation connecting distinct hig…