We theoretically investigate how the Berry curvature, which arises in multiband structures when electrons can be described by an effective single-band Hamiltonian, affects superconducting properties of two-dimensional electronic systems. Generically, curvature is coupled to electric fields beyond those created periodic crystal potential. A potential source such fields, vary slowly on lattice sc...

The two-dimensional kagome spin lattice structure of Mn atoms in the family ${\mathrm{Mn}}_{3}X$ noncollinear antiferromagnets are providing substantial excitement exploration Berry-curvature physics and associated nontrivial magnetotransport responses. Much these studies performed hexagonal systems, mainly ${\mathrm{Mn}}_{3}\mathrm{Sn}$ ${\mathrm{Mn}}_{3}\mathrm{Ge}$ with planes having their n...

We introduce an effective 2-dimer tight-binding model for the family of Shastry-Sutherland models with geometrically tunable triplon excitations. The Rashba pseudospin-orbit coupling induced by tilted external magnetic field leads to elementary excitations having nontrivial topological properties {\pi}-Berry flux. interplay between in-plane and out-of-plane thus allows us effectively engineer b...

In this Letter, we study the spin Nernst effect (SNE) of magnons in nonlinear response regime. We derive formula for magnon current by solving Boltzmann equation and find out that it is described an extended Berry curvature dipole magnons. The SNE expected to occur various N\'eel antiferromagnets without Dzyaloshinskii-Moriya interaction. particular, honeycomb diamond lattice can be controlled ...

Abstract We explore emergent geometry of the spacetime at microscopic scale by adiabatic transport a quasi-coherent state fermionic string, with quantum described matrix theory (BFSS model). show that generator Berry phase is shift vector foliation spacelike surfaces associated state. The operator-valued geometric weak Lorentz connection which not torsion free scale. effects seem consistent usu...

Starting with general semiclassical equations of motion for electrons in the presence electric and magnetic fields, we extend Chambers formula to include addition a field, time-dependent fields bands Berry curvature. We thereby compute conductivity tensor ${\sigma}_{{\alpha}{\beta}}(B,{\omega})$ field two (2D) three (3D) dimensions focus then on several applications magnetotransport metals Ferm...

A bstract For two-dimensional holographic CFTs, we demonstrate the role of Berry phases for relating non-factorization Hilbert space to presence wormholes. The wormholes are characterized by a non-exact symplectic form that gives rise phase. connecting two spacelike regions in gravitational spacetimes, find non-exactness is linked variable appearing phase boundary CFT. This corresponds loop int...

Strain can be used to modify the band structure—and thus electronic properties—of two-dimensional materials. However, research has focused on use of monolayer graphene with a limited lowering spatial symmetry and considered only real-space pseudo-magnetic field. Here we show that lithographically patterned strain create non-trivial structure exotic phase matter in bilayer graphene. The approach...