2,930 research outputs found
Sy Montgomery and Matt Patterson: 2024 Cook Prize Gold Medal Winners
No full textAuthor Sy Montgomery and illustrator Matt Patterson\u27s video for The Book of Turtles (Clarion)https://educate.bankstreet.edu/cook/1012/thumbnail.jp
Two types of electronic states in one-dimensional crystals of finite length
No full textExact and general results on the electronic states in one-dimensional crystals bounded at tau and tau + L, where L = Na, N is a positive integer, and a is the potential period, are presented. Corresponding to each energy band of the Bloch wave, there are N - 1 states in the finite crystal whose energies are dependent on L but not on tau and map the energy band exactly. There is always one and only one electronic state corresponding to each band gap of the Bloch wave, whose energy is dependent on r but not on L. This state is either a constant-energy confined band-edge state or a surface state in the band gap. (C) 2002 Elsevier Science (USA).Physics, MultidisciplinarySCI(E)0ARTICLE122-3030
Complete quantum confinement of one-dimensional Bloch waves
No full textAn analytical solution is given for the complete quantum confinement of one-dimensional Bloch waves in an inversion-symmetric potential. The energy spectrum of the confined Bloch states maps the energy bands exactly. For each band gap, the energy of one band-edge state does not change as the confinement length L changes. Only the energy of the, other band-edge state changes and might be described by the effective-mass approximation.Physics, Condensed MatterSCI(E)15ARTICLE3null6
Quantum confinement in semiconductor Ge quantum dots
No full textA theoretical investigation on how the band structure of bulk semiconductors specifically affects the quantum confinement in quantum dots is presented, using Ge as an example. The intrinsic difference of the quantum confinement of different symmetrical valence states may bring some completely new physics as the quantum dot size decreases. (C) 1997 Elsevier Science Ltd.Physics, Condensed MatterSCI(E)EI38ARTICLE6479-48410
Electronic states in quantum films
No full textExact and general results on the electronic states in quantum films bounded at tau(3)a(3) and (tau(3) + N-3) a(3) - here a(3) is the only primitive lattice vector out of the film plane, tau(3) is the bottom boundary and N-3 is a positive integer indicating the thickness of the film - are presented. In many interesting cases, such as in face-center cubic ( 001) and ( 110) films, the energies of most electronic states in the film can be analytically obtained from the corresponding energy band structure of the bulk: For each energy band of the bulk and each wave vector (k) over cap in the film plane, there are N-3 - 1 electronic states in the film whose energy is dependent on the film thickness N-3 but not on the film boundary tau(3) and maps the energy band of the bulk exactly, and there is one electronic state whose energy is dependent on tau(3) but not on N-3 and is above or at the highest energy in that energy band with that (k) over cap. This approach can be further extended to obtain exact and general results on electronic states in quantum wires and quantum dots.Physics, MultidisciplinarySCI(E)3ARTICLE6783-7896
Photometric study of a marginal contact binary SY Hor
Get PDF32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYIn this study, we present light curve analysis of a southern contact binary SY lior. Photometric parameters of the system and its components are derived using the Wilson and Devinney code based on the data taken from the SuperWASP public data archive. Photometric solutions indicate that SY Hai is a marginal contact binary system with a mass ratio of q = 1.59 and a contact degree of f = 6%.Turkish Phys So
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