TY - JOUR
T1 - Critical behavior for point monopole and dipole electric impurities in uniformly and uniaxially strained graphene
AU - Pérez-Pedraza, Julio César
AU - Díaz-Bautista, Erik
AU - Raya, Alfredo
AU - Valenzuela, David
N1 - Publisher Copyright:
© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
PY - 2020/7/15
Y1 - 2020/7/15
N2 - We revisit the problem of bound states in graphene under the influence of point electric monopole and dipole impurity potentials extended to the case in which the membrane of this material is uniformly and uniaxially strained, which leads to a redefinition of the charge and dipole moment, respectively. By considering an anisotropic Fermi velocity, we analytically solve the resulting Dirac equation for each potential. We observe that the effect of the anisotropy is to promote or inhibit the critical behavior known to occur for each kind of impurity, depending on the direction along which strain is applied: both the atomic collapse, for the monopole impurity, and the emergence of cascades of infinitely many bound states with a universal Efimov-like scaling, for the dipole impurity, are phenomena that occur under less or more restrictive conditions due to strain.
AB - We revisit the problem of bound states in graphene under the influence of point electric monopole and dipole impurity potentials extended to the case in which the membrane of this material is uniformly and uniaxially strained, which leads to a redefinition of the charge and dipole moment, respectively. By considering an anisotropic Fermi velocity, we analytically solve the resulting Dirac equation for each potential. We observe that the effect of the anisotropy is to promote or inhibit the critical behavior known to occur for each kind of impurity, depending on the direction along which strain is applied: both the atomic collapse, for the monopole impurity, and the emergence of cascades of infinitely many bound states with a universal Efimov-like scaling, for the dipole impurity, are phenomena that occur under less or more restrictive conditions due to strain.
UR - http://www.scopus.com/inward/record.url?scp=85092723795&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.102.045131
DO - 10.1103/PhysRevB.102.045131
M3 - Artículo
AN - SCOPUS:85092723795
SN - 2469-9950
VL - 102
JO - Physical Review B
JF - Physical Review B
IS - 4
M1 - 045131
ER -