Insulating Nature of Strongly Correlated Massless Dirac Fermions in an Organic Crystal.
Phys Rev Lett
; 116(22): 226401, 2016 Jun 03.
Article
in En
| MEDLINE
| ID: mdl-27314731
ABSTRACT
Through resistivity measurements of an organic crystal hosting massless Dirac fermions with a charge-ordering instability, we reveal the effect of interactions among massless Dirac fermions on the charge transport. A low-temperature resistivity upturn appears robustly irrespective of the pressure and is enhanced while approaching the critical pressure of charge ordering, indicating that the insulating behavior originates from short-range Coulomb interactions. The observation of an apparently vanishing gap in the charge-ordered phase accords with the theoretical prediction of nontopological edge states.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2016
Type:
Article
Affiliation country:
Japan