/ D. N. Maksimov, E. N. Bulgakov, A. R. Kolovsky> // Phys. Rev. A. - 2015. -
Vol. 91,
Is. 5. - Ст. 053632,
DOI 10.1103/PhysRevA.91.053632. - Cited References:22. - The authors acknowledge financial support from Russian Foundation for Basic Research through the Project No. 15-02-00463, Wannier-Stark states and Bloch oscillations of a quantum particle in a generic two-dimensional lattice.
. - ISSN 1050. - ISSN 1094-1622
Перевод заглавия: Состояния Ванье-Штарка в альтернантных решётках. 2. Двумерные решётки
РУБ Optics + Physics, Atomic, Molecular & Chemical
Аннотация: We analyze the Wannier-Stark spectrum of a quantum particle in tilted two-dimensional lattices with the Bloch spectrum consisting of two subbands, which could be either separated by a finite gap or connected by the Dirac points. For rational orientations of the static field given by an arbitrary superposition of the translation vectors, the spectrum is a ladder of energy bands. We obtain asymptotic expressions for the energy bands in the limit of large and weak static fields and study them numerically for intermediate field strength. We show that the structure of energy bands determines the rate of spreading of localized wave packets, which is the quantity measured in laboratory experiments. It is shown that wave-packet dispersion becomes a fractal function of the field orientation in the long-time regime of ballistic spreading.
Смотреть статью,
Scopus,
WOS,
Для получение полного текста обратитесь в библиотеку
Держатели документа: LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа: Bulgakov, E. N.;
Булгаков,
Евгений Николаевич; Kolovsky, A. R.; Коловский, Андрей Радиевич; Максимов, Дмитрий
Николаевич; Russian Foundation for Basic Research [15-02-00463]