Christou, E;
Uchoa, B;
Kruger, F;
(2018)
Hidden charge order of interacting Dirac fermions on the honeycomb lattice.
Physical Review B
, 98
, Article 161120(R). 10.1103/PhysRevB.98.161120.
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Abstract
We consider the extended half-filled Hubbard model on the honeycomb lattice for second nearest-neighbor interactions. Using a functional integral approach, we find that collective fluctuations suppress topological states and instead favor 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 novel hidden metallic charge order with semi-Dirac excitations. We conjecture that this transition is not in the Gross-Neveu universality class.
| Type: | Article |
|---|---|
| Title: | Hidden charge order of interacting Dirac fermions on the honeycomb lattice |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.98.161120 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.98.161120 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059536 |
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