28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

Torsion through time-loops on bidimensional Dirac materials

29 Jul 2020, 18:05
virtual conference

virtual conference

Talk 10. Formal Theory Formal Theory


Dr Pablo Pais (Charles University)


After a brief review of how to describe the π electrons of Dirac materials and topóligical defects, such as disclinations and dislocations, we propose a scenario where the effects of dislocations, in bidimensional Dirac materials, can be described, at low energies, by a vertex proportional to the totally antisymmetric component of the torsion generated by such dislocations. It is suggested that the two-dimensional geometric obstructions, already known in the literature, can be avoided by including time in the description of π electrons. In particular, the emphasis is placed on exotic time-loops, which could be obtained from the hole-particle pair excitations. If torsion/dislocation is present, a net flow of particles-antiparticles (holes) can be inferred and, possibly, be measured.

Primary authors

Dr Adamantia Zampeli (Charles University) Prof. Alfredo Iorio (Charles University) Prof. Marcelo F. Ciappina (ICFO, Barcelona) Dr Pablo Pais (Charles University)

Presentation Materials