Talks

coffee, tea, cookies at 16:15 in the main hall
Monday 16:30-17:30
Seminar room 1+2
- monthly seminars -
Seminar room 4
- weekly seminars -
Monday 11:00-12:00
Room 1D1
Wednesday 16:30 - 17:30
Seminar room 1D1
Thursday 14:00-15:00
Seminar room 4

 

 

 

Talks in chronological order

20 Dec 2018
02:00 PM

Suppression of topological Mott insulators and novel quantum criticality of interacting Dirac fermions on the honeycomb lattice

Frank Kruger (UCL)

We consider the extended half-filled Hubbard model on the honeycomb lattice for second nearest neighbours interactions. Using a functional integral approach, we find that collective fluctuations suppress topological states and instead favour charge ordering, in agreement with previous numerical studies. However, we show that the critical point is not of the putative semimetal-Mott insulator variety. Due to the frustrated nature of the interactions, the ground state is described by a hidden metallic charge order with semi-Dirac excitations. We conjecture that this novel transition is not in the Gross-Neveu universality class.

Room 1D1 iCal Event
21 Jan 2019
04:30 PM

Colloquium tba.

Prof. Charles Kane (University of Pennsylvania, PA, USA)

Seminarroom 1+2 iCal Event
04 Feb 2019
04:30 PM

Colloquium: tba

Dr. Jacqueline Bloch (Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Sud, Université Paris-Saclay, C2N Marcoussis, F-91460 Marcoussis, France)

Seminarroom 1+2 iCal Event
25 Feb 2019
04:30 PM

Colloquium: tba.

Seminarroom 1+2 iCal Event
11 Mar 2019
04:30 PM

Colloquium: tba

Prof. Dr. Alexander Szameit (Universität Rostock)

Seminarroom 1+2 iCal Event
18 Mar 2019
04:30 PM

Colloquium: tba.

Prof. Dr. Christian Pfleiderer (Technische Universität München)

Seminarroom 1+2 iCal Event