|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Fermi surface topology and topological numbers in conductivity of normal metals
If you have a question about this talk, please contact Mustapha Amrani.
Topological Dynamics in the Physical and Biological Sciences
We consider the geometry of the quasiclassical electron trajectories on complicated Fermi surfaces in the presence of a strong magnetic field. Using rigorous topological theorems we present the classification of different topological types of open electron trajectories on the Fermi surfaces and consider the corresponding conductivity regimes in the limit $B ightarrow infty$. It is shown that the presence of the regular non-closed electron trajectories always leads to the presence of ‘topological numbers’ observable in the conductivity behaviour. On the other hand, the appearance of unstable non-closed electron trajectories may lead to rather interesting behaviour of conductivity, in particular, to the freezing of the longitudinal conductivity in the limit $B ightarrow infty$. The full picture of different regimes of magneto-conductivity behaviour can be considered as an important characteristic of the dispersion relation in metals.
(Joint work with S.P. Novikov).
This talk is part of the Isaac Newton Institute Seminar Series series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsCambridge Carbon Nanotechnology Society Cambridge University Geographical Society Genetics Seminar Series
Other talksProf Serge Muyldermans: Citizens, Science and Science for Citizens The Effect of Recommendations on Network Structure On anonymisation and discrimination Lunchtime Talk: Helen's Bedroom Personal Data Stores the Route to Data Independence, Portability, Trust and Seamless Services