Strong electron quantum interference effects have been observed at room temperature in the current‐voltage characteristics of a double‐barrier, wide‐well, lattice‐matched In0.52Al0.48As /In0.53Ga0.47As heterostructure tunneling device. A total of 22 oscillations was observed in the differential conductance. A model is proposed which attributes ten of the oscillations to the usual resonant tunneling via the subbands and the rest to the presence of virtual states that exist in the well and second barrier regions.

1.
M.
Heiblum
,
I. M.
Anderson
, and
C. M.
Knoedler
,
Appl. Phys. Lett.
49
,
207
(
1986
).
Google Scholar
Crossref
Search ADS
 
2.
M.
Heiblum
,
M. V.
Fischetti
,
W. P.
Dumke
,
D. J.
Frank
,
I. M.
Anderson
,
C. M.
Knoedler
, and
L.
Osterling
,
Phys. Rev. Lett.
58
,
816
(
1987
).
Google Scholar
Crossref
Search ADS
PubMed
 
3.
S.
Sen
,
F.
Capasso
,
A. C.
Gossard
,
R. A.
Spah
,
A. L.
Hutchinson
, and
S. N. G.
Chu
,
Appl. Phys. Lett.
51
,
1428
(
1987
).
Google Scholar
Crossref
Search ADS
 
4.
K. H.
Gundlach
,
Solid‐State Electron.
9
,
949
(
1966
).
Google Scholar
Crossref
Search ADS
 
5.
J.
Smoliner
,
R.
Christanell
,
M.
Hauser
,
E.
Gornik
,
G.
Weimann
, and
K.
Ploog
,
Appl. Phys. Lett.
50
,
1727
(
1987
).
Google Scholar
Crossref
Search ADS
 
6.
T. W.
Hickmott
,
P. M.
Solomon
,
R.
Fisher
, and
H.
Morkoç
,
Appl. Phys. Lett.
44
,
90
(
1984
).
Google Scholar
Crossref
Search ADS
 
7.
Y.
Zohta
,
K.
Tsuda
, and
Y. S.
Hiraoka
,
J. Vac. Sci. Technol. B
4
,
658
(
1986
).
Google Scholar
Crossref
Search ADS
 
8.
F.
Capasso
,
K.
Mohammed
, and
A.
Cho
,
IEEE J. Quantum Electron.
QE‐22
,
1853
(
1986
).
Google Scholar
 
9.
V. J.
Goldman
,
D. C.
Tsui
,
J. E.
Cunningham
, and
W. T.
Tsang
,
J. Appl. Phys.
61
,
2693
(
1987
).
Google Scholar
Crossref
Search ADS
 
10.
Y.
Sugiyama
,
T.
Inata
,
T.
Fujii
,
Y.
Nakata
,
S.
Muto
, and
S.
Hiyamizu
,
Jpn. J. Appl. Phys.
25
,
L648
(
1986
).
Google Scholar
Crossref
Search ADS
 
11.
M.
Matsuura
 and
T.
Kamizato
,
Phys. Rev. B
33
,
8385
(
1986
).
Google Scholar
Crossref
Search ADS
 
12.
Wlodek Zawadzki, in Two‐Dimensional Systems, Heterostructures, and Superlattices, edited by G. Bauer, F. Knuchar, and H. Heinrich, Vol. 53 of Springer Series in Solid State Sciences (Springer, Berlin, 1984).
13.
A modulation in T(E) for the model discussed corresponds to a modulation in T(Vb) for the tunneling device under bias Vb; the modulation in T(Vb) results in a corresponding modulation in the device current J(Vb). See, for example,
T.
Weil
 and
B.
Vinter
,
Appl. Phys. Lett.
50
,
1281
(
1987
).
Google Scholar
Crossref
Search ADS
 
14.
See, for example, L. I. Schiff, Quantum Mechanics (McGraw‐Hill, New York, 1968), Chaps. 4 and 5;
G. Baym, Lectures on Quantum Mechanics (Benjamin, London, 1973), Chap. 4.
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© 1988 American Institute of Physics.
1988
American Institute of Physics
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