https://doi.org/10.1007/s100510050312
Transmission resonances in magnetic-barrier structures
1
Department of Physics, Tsinghua University, Beijing 100084,
P.R. China
2
Institute for Materials Research, Tohoku University, Sendai 980-8577,
Japan
Corresponding author: a guoy@phys.tsinghua.edu.cn
Received:
18
August
1997
Revised:
20
September
1997
Accepted:
13
October
1997
Published online: 15 May 1998
Quantum transport properties of electrons in simple magnetic-barrier (MB) structures and in finite MB
superlattices are investigated in detail. It is shown that there exists a transition of transmission resonances,
i.e., from incomplete transmission resonances in simple
MB structures consisting of unidentical blocks,
to complete transmission resonances
in comparatively complex MB structures (, n is the number of barriers).
In simple unidentical block arrangements in double- and triple-MB structures we can also obtain complete transmission
by properly adjusting parameters of the building blocks according to ky-value (ky is the wave vector in y direction).
Strong suppression of the transmission and of the conductance is found in MB superlattices
which are periodic arrangements of two different blocks.
The resonance splitting
effect in finite MB superlattices is examined. It is confirmed that the rule (i.e., for n-barrier tunneling
the splitting
would be
-fold) obtained in periodic electric
superlattices can be extended to periodically arranged MB superlattices of identical blocks
through which electrons with
tunnel, and
it is no longer proper
for electrons with
to tunnel.
PACS: 73.40.Gk – Tunneling / 03.65.Ge – Solutions of wave equations: bound states
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998