TY - JOUR
T1 - Field emission patterns from first-principles electronic structures
T2 - Application to pristine and cesium-doped carbon nanotubes
AU - Khazaei, Mohammad
AU - Farajian, Amir A.
AU - Kawazoe, Yoshiyuki
PY - 2005/10/21
Y1 - 2005/10/21
N2 - A general approach is introduced to calculate field emission properties of any kind of nanostructure based on the first-principles local density of states (LDOS) and effective potentials. The experimental field emission spectroscopy images are explained as LDOS at the structure-vacuum barrier, weighted by the probability of electron tunneling. The method excellently reproduces the experimental field emission patterns of pristine capped carbon nanotubes. We show that cesium adsorbates even with a low doping ratio of one dopant per nanotube increase the emission current around 2.5 times, due to a generated dipole field.
AB - A general approach is introduced to calculate field emission properties of any kind of nanostructure based on the first-principles local density of states (LDOS) and effective potentials. The experimental field emission spectroscopy images are explained as LDOS at the structure-vacuum barrier, weighted by the probability of electron tunneling. The method excellently reproduces the experimental field emission patterns of pristine capped carbon nanotubes. We show that cesium adsorbates even with a low doping ratio of one dopant per nanotube increase the emission current around 2.5 times, due to a generated dipole field.
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U2 - 10.1103/PhysRevLett.95.177602
DO - 10.1103/PhysRevLett.95.177602
M3 - Article
AN - SCOPUS:28844453716
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
M1 - 177602
ER -