Momentum and pseudomomentum: II. An electron in a one-dimensional periodic potential

Autor:	A B Pippard
Rok vydání:	1992
Předmět:	Physics Reciprocal lattice Particle in a one-dimensional lattice Classical mechanics Recoil Quantum mechanics Wave packet Crystal momentum Momentum transfer General Physics and Astronomy Electron Wave function
Zdroj:	European Journal of Physics. 13:88-94
ISSN:	1361-6404 0143-0807
Popis:	For pt.I see ibid., vol.13, no.2 (1992). When an electron moving on a periodic lattice is reflected from a massive obstacle, the force on the obstacle depends on its precise location. If it is free to move, however, the average force is determined by the pseudo-momentum h(cross)k+ng, where g is the reciprocal lattice vector and the value for n is shown to be unambiguously defined. The relation between momentum and pseudo-momentum is studied through the Kronig-Penney model. It is shown that an electronic wavepacket carries lattice momentum along with it, and further that when an electron is accelerated by an applied force its wavefunction is distorted to the extent necessary to conserve momentum through lattice recoil.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a35b059399e1aba2fd1f8ba64dea0c4 https://doi.org/10.1088/0143-0807/13/2/006 Zobrazit plný text záznamu