12 papers
Andreev reflection mediated by topological corner states in a two-dimensional honeycomb lattice
Kai-Tong Wang, Yunjin Yu, Fuming Xu +1
Topological corner states in two-dimensional second-order topological insulators (SOTIs) are localized in real space. We numerically demonstrate that such localized topological cor…
Dual Quantum Geometric Tensors and Local Topological Invariant
Rongjie Cui, Longjun Xiang, Fuming Xu +1
The conventional quantum geometric tensor (QGT) is Hermitian, with a real symmetric quantum metric and an imaginary antisymmetric Berry curvature. We show that the Zeeman QGT is ge…
Quantum geometric map of magnetotransport
Longjun Xiang, Jinxiong Jia, Fuming Xu +1
We propose a quantum geometric map for the magnetononlinear Hall effect (MNHE), the planar Hall effect (PHE), and the ordinary Hall effect (OHE). These magnetotransport phenomena o…
Linear thermal noise induced by Berry curvature dipole in a four-terminal system
Wenyu Chen, Miaomiao Wei, Yunjin Yu +2
In this work, we numerically investigate linear thermal noise in a four-terminal system with a finite Berry curvature dipole (BCD) using the nonequilibrium Green's function formali…
Unconventional Hall Effect in Gapless Superconductors: Transverse Supercurrent Converted from Normal Current
Miaomiao Wei, Longjun Xiang, Fuming Xu +2
A normal metallic system proximitized by a superconductor can exhibit a gapless superconducting state characterized by segmented Fermi surfaces, as confirmed experimentally. In suc…
General method for calculating transport properties of disordered mesoscopic systems based on the nonequilibrium Green's function formalism
Gaoyang Li, MiaoMiao Wei, Fuming Xu +1
Disorder scattering plays important roles in quantum transport as well as various Hall effects, including the second-order nonlinear Hall effect induced by Berry curvature dipole.…