Sökning: "higher Berry curvature"

Hittade 2 uppsatser innehållade orden higher Berry curvature.

1. 1. Strain-induced nonlinear Hall effect in graphene systems

   Master-uppsats, Stockholms universitet/Fysikum

   Författare :Pedram Pakmehr; [2022]
   Nyckelord :;

   Sammanfattning : This thesis aims to study the nonlinear electrical transport response of monolayer and bilayer graphene systems under the influence of different lattice deformations (strain). Broken inversion and rotation symmetries can generate a second-order transverse current response called the nonlinear Hall effect in the presence of time-reversal symmetry. LÄS MER

3. 2. Higher Forms and Dimensional Hierarchy in Topological Condensed Matter

   Master-uppsats, KTH/Fysik

   Författare :Yashar Honarmandi; [2022]
   Nyckelord :Theoretical physics; topological quantum matter; parametrized systems; Berry phase; higher Berry curvature; effective field theory; topological action; topological insulators; dimensional hierarchy; Teoretisk fysik; topologisk kvantmateria; parametriserade system; Berryfas; högre Berrykrökning; effektiv fältteori; topologisk verkan; topologiska isolatorer; dimensionshierarki;

   Sammanfattning : This report discusses higher differential forms with applications in the study of topological phenomena. The integer quantum Hall effect is first discussed, demonstrating a connection between models on a lattice and quantum field theories bridged by a topological invariant, namely the Chern number. LÄS MER