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19 papers · 1 filter
M-theory and Seven-Dimensional Inhomogeneous Sasaki-Einstein Manifolds
Hyojoong Kim, Sunchang Kim, Nakwoo Kim +1
Seven-dimensional inhomogeneous Sasaki-Einstein manifolds present a challenging example of AdS/CFT correspondence. At present, their field theory duals for $KE_4=\m…
Raman Spectroscopy Study of Annealing-Induced Effects on Graphene Prepared by Micromechanical Exfoliation
Jieun Song, Taeg Yeoung Ko, Sunmin Ryu
In this note, we report a Raman spectroscopy study of annealing-induced effects on graphene samples prepared by the microexfoliation method. It was shown that randomly located adhe…
Electrical transport in small bundles of single-walled carbon nanotubes: intertube interaction and effects of tube deformation
Taekyung Kim, Gunn Kim, Woon Ih Choi +2
We report a combined electronic transport and structural characterization study of small carbon nanotube bundles in field-effect transistors (FET). The atomic structures of the bun…
Band gap control of small bundles of carbon nanotubes using applied electric fields: A density functional theory study
Gunn Kim, J. Bernholc, Young-Kyun Kwon
Electrostatic screening between carbon nanotubes (CNTs) in a small CNT bundle leads to a switching behavior induced by electric field perpendicular to the bundle axis. Using a firs…
On the generality of the LLM geometries in M-theory
Eoin Ó Colgáin, Jun-Bao Wu, Hossein Yavartanoo
In this note we revisit the Lin, Lunin, Maldacena (LLM) class of d=11 supergravity solutions with symmetry SO(6) X SO(3) X R, but generalise to allow for all fluxes consistent with…
Tunable charge donation and spin polarization of metal adsorbates on graphene using applied electric field
Jae-Hyeon Parq, Jaejun Yu, Young-Kyun Kwon +1
Metal atoms on graphene, when ionized, can act as a point charge impurity to probe a charge response of graphene with the Dirac cone band structure. To understand the microscopic p…