INVESTIGADORES
REYNOSO Andres Alejandro
artículos
Título:
Magnetic Breakdown of Cyclotron Orbits in Systems with Rashba and Dresselhauss Spin-orbit Coupling
Autor/es:
A. A. REYNOSO; GONZALO USAJ; C. A. BALSEIRO
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2008 vol. 78 p. 115312 - 115313
ISSN:
1098-0121
Resumen:
We study the effect of
the interplay between the Rashba and the Dresselhaus spin-orbit couplings on
the transverse electron focusing in two-dimensional electron gases. Depending
on their relative magnitude, the presence of both couplings can result in the
splitting of the first focusing peak into two or three. This splitting has
information about the relative value of spin-orbit couplings and therefore
about the shape of the Fermi surface. More interesting, the presence of the
third peak is directly related to the tunneling probability (magnetic breakdown) between orbits
corresponding to the different sheets of the Fermi surface. In addition,
destructive interference effects between paths that involve tunneling and those
that do not can be observed in the second focusing condition. Such electron
paths (orbits) could be experimentally detected using current techniques for
imaging the electron flow opening the possibility to directly observe and
characterize the magnetic breakdown effect in this system.