Half-integer anomalous currents in 2D materials from a QFT viewpoint
David Dudal, Filipe Matusalem, Ana Júlia Mizher, Alexandre Reily Rocha, Cristian Villavicencio
ARTIGO
Inglês
Agradecimentos: A. J. M. receives partial support from FAPESP under fellowship number 2016/12705-7. F. M. thanks CNPq, Grant No. 381511/2018-9 and FAPESP, grant No. 2020/06896-0 for financial support. A. R. R. was supported by FAPESP grants 2017/02317-2 and 2016/01343-7. C. V. acknowledges financial...
Ver mais
Agradecimentos: A. J. M. receives partial support from FAPESP under fellowship number 2016/12705-7. F. M. thanks CNPq, Grant No. 381511/2018-9 and FAPESP, grant No. 2020/06896-0 for financial support. A. R. R. was supported by FAPESP grants 2017/02317-2 and 2016/01343-7. C. V. acknowledges financial support from FONDECYT under grants 1190192 and 1200483. We thank A. Saraiva, I. Shovkovy, S. Mellaerts, L. Levrouw and M. Houssa for fruitful discussions
Ver menos
Abstract: Charge carriers in Dirac/Weyl semi-metals exhibit a relativistic-like behavior. In this work we propose a novel type of intrinsic half-integer Quantum Hall effect in 2D materials, thereby also offering a topological protection mechanism for the current. Its existence is rooted in the 2D...
Ver mais
Abstract: Charge carriers in Dirac/Weyl semi-metals exhibit a relativistic-like behavior. In this work we propose a novel type of intrinsic half-integer Quantum Hall effect in 2D materials, thereby also offering a topological protection mechanism for the current. Its existence is rooted in the 2D parity anomaly, without any need for a perpendicular magnetic field. We conjecture that it may occur in disturbed honeycomb lattices where both spin degeneracy and time reversal symmetry are broken. These configurations harbor two distinct gap-opening mechanisms that, when occurring simultaneously, drive slightly different gaps in each valley, causing a net anomalous conductivity when the chemical potential is tuned to be between the distinct gaps. Some examples of promising material setups that fulfill the prerequisites of our proposal are also listed to motivate looking for the effect at the numerical and experimental level
Ver menos
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2016/12705-7; 2020/06896-0; 2017/02317-2; 2016/01343-7
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
381511/2018-9
Aberto
Half-integer anomalous currents in 2D materials from a QFT viewpoint
David Dudal, Filipe Matusalem, Ana Júlia Mizher, Alexandre Reily Rocha, Cristian Villavicencio
Half-integer anomalous currents in 2D materials from a QFT viewpoint
David Dudal, Filipe Matusalem, Ana Júlia Mizher, Alexandre Reily Rocha, Cristian Villavicencio
Fontes
|
Scientific reports Vol. 12, n. 1 (Mar., 2022), n. art. 5439, p. 1-10 |