Details
| Original language | English |
|---|---|
| Pages (from-to) | 3864-3868 |
| Number of pages | 5 |
| Journal | Physica Status Solidi (B) Basic Research |
| Volume | 243 |
| Issue number | 15 |
| Publication status | Published - 1 Dec 2006 |
Abstract
We report on spin blockade observed in several different lateral quantum dot systems. We observe the typical features of alternating position and amplitude of Coulomb peaks as a function of a magnetic field perpendicular to the sample surface. In a nonlinear regime strong negative differential conductance is observed with a striking regularity. This is not a universal behaviour. Instead we propose a complex interplay of spin blockade, electron interaction and relaxation. At strong tunnel coupling to the leads we use spin blockade as a spectroscopy tool to reveal the spin configuration in a Kondo regime with a pronounced chessboard pattern. By comparing measurements of different samples we find that Kondo effect and spin blockade can be combined in two different ways depending on the spin configuration of the dot. Thus the combination of both effects can be used to detect spin polarized filling of dot orbitals instead of regular filling.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica Status Solidi (B) Basic Research, Vol. 243, No. 15, 01.12.2006, p. 3864-3868.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Spin blockade in lateral quantum dots - Negative differential conductance and spin spectroscopy
AU - Rogge, M. C.
AU - Kupidura, D.
AU - Reinwald, M.
AU - Wegscheider, W.
AU - Haug, R. J.
PY - 2006/12/1
Y1 - 2006/12/1
N2 - We report on spin blockade observed in several different lateral quantum dot systems. We observe the typical features of alternating position and amplitude of Coulomb peaks as a function of a magnetic field perpendicular to the sample surface. In a nonlinear regime strong negative differential conductance is observed with a striking regularity. This is not a universal behaviour. Instead we propose a complex interplay of spin blockade, electron interaction and relaxation. At strong tunnel coupling to the leads we use spin blockade as a spectroscopy tool to reveal the spin configuration in a Kondo regime with a pronounced chessboard pattern. By comparing measurements of different samples we find that Kondo effect and spin blockade can be combined in two different ways depending on the spin configuration of the dot. Thus the combination of both effects can be used to detect spin polarized filling of dot orbitals instead of regular filling.
AB - We report on spin blockade observed in several different lateral quantum dot systems. We observe the typical features of alternating position and amplitude of Coulomb peaks as a function of a magnetic field perpendicular to the sample surface. In a nonlinear regime strong negative differential conductance is observed with a striking regularity. This is not a universal behaviour. Instead we propose a complex interplay of spin blockade, electron interaction and relaxation. At strong tunnel coupling to the leads we use spin blockade as a spectroscopy tool to reveal the spin configuration in a Kondo regime with a pronounced chessboard pattern. By comparing measurements of different samples we find that Kondo effect and spin blockade can be combined in two different ways depending on the spin configuration of the dot. Thus the combination of both effects can be used to detect spin polarized filling of dot orbitals instead of regular filling.
UR - http://www.scopus.com/inward/record.url?scp=33845805203&partnerID=8YFLogxK
U2 - 10.1002/pssb.200671509
DO - 10.1002/pssb.200671509
M3 - Article
AN - SCOPUS:33845805203
VL - 243
SP - 3864
EP - 3868
JO - Physica Status Solidi (B) Basic Research
JF - Physica Status Solidi (B) Basic Research
SN - 0370-1972
IS - 15
ER -