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Volumn 75, Issue 7, 2007, Pages

First-principles dynamic simulations of field emission from carbon nanotubes on gold substrate

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Indexed keywords


EID: 33846853276     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.75.075408     Document Type: Article
Times cited : (8)

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    • In a first-order perturbation, perturbed energy is determined by ψi Ez ψi where the external field is E z along the tube axis direction. Here, because the s -like and p -like states are uniformly distributed over all the tube region, this first-order term is nearly zero when the position of the center of the tube is set to zero. Therefore the first-order term gives no effect. In second order, the perturbed energy Δ Ei = j ψi Ez ψj 2 Ei - Ej shows two things. First, ψi Ez ψj does not vanish if ψi and ψj have the same rotational symmetry because Ez does not break rotational symmetry. Second, a small energy difference between Ei and Ej makes a large perturbation. See Addison-Wesley Longman, 3rd ed.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.