Events in Physics
Frank Kruger (UCL), Suppression of topological Mott insulators and novel quantum criticality of interacting Dirac fermions on the honeycomb lattice
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 Dirac semimetal/Mott insulator variety. Due to the frustrated nature of the interactions, the charge-ordered ground state remains metallic with semi-Dirac excitations. We conjecture that this novel transition is not in the Gross-Neveu universality class.
Academic Leave Diary
Physics Days
Research Group Events
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Open Funder Deadlines
UKRI - Daphne Jackson Fellowship
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UKRI Deadlines
Due to the implementation of a new UKRI funding system (TFS) there will be a fixed quarterly deadlines for some grants which would previously have been on open calls, this is to allow necessary system amendments and updates.
The first deadline after implementation will be 28th September 2023 and applies to those calls listed below:
EPSRC Post Doctoral Fellowship
EPSRC Working with overseas scientists