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Physics Theoretical Physics

Theory Group Lunchtime Seminars

Scheduled seminars are listed below.

Announcements and reminders will be posted to the physics-theory-group-seminar list.

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[If you are a member of Theory group, you will receive seminar announcements via physics-theory or physics-theory-staff. You do NOT need to subscribe to the above mailing list as well.]

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Theory Seminar: Joseph Betouras (Loughborough), Fermi surface topological transitions: surprising effects in correlated systems

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Location: PS1.28

In this talk I will present some surprising effects of the originally envisaged by Lifshitz usual Fermi surface topological transitions and introduce higher order ones. Two distinct examples will be presented: (i) the effects on ferromagnetic superconductors and in particular on URhGe [1] which stems from usual Lifshitz transitions and (ii) explanation of experimental puzzles of Sr3Ru2O7 [2] which is an example of a higher order Fermi surface topological transition. Then I will touch upon ongoing work on the classification of these higher order transitions in two dimensions [3]. 

[1] Y. Sherkunov, A. V. Chubukov and J. J. B., Phys. Rev. Lett. 121, 097001 (2018).

[2] D. V. Efremov, A. Shtyk, A. W. Rost, C. Chamon, A. P. Mackenzie and J. J. B. Phys. Rev. Lett. 123, 207202 (2019).

[3] A. Chandrasekaran, A. Shtyk, J. J. B and C. Chamon, arXiv:1910.10183.  

Tags: Theory Seminar

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