Small Signal Differential Mobility of Planar Superlattice Miniband Transport and Negative Differential Conductance

1995 ◽  
pp. 485-488
Author(s):  
X. L. Lei ◽  
N. J. M. Horing ◽  
H. L. Cui ◽  
K. K. Thornber
Keyword(s):  
Differential Conductance ◽  
Small Signal ◽  
Differential Mobility ◽  
Negative Differential Conductance ◽  
Miniband Transport

ANOMALOUS FREQUENCY DEPENDENCE OF DIFFERENTIAL MOBILITY IN SUPERLATTICE MINIBAND TRANSPORT

1996 ◽  
Vol 10 (01n02) ◽  
pp. 51-60
Author(s):  
X.L. LEI ◽  
N.J.M. HORING ◽  
H.L. CUI ◽  
K.K. THORNBER
Keyword(s):  
Frequency Dependence ◽  
High Frequency ◽  
Small Signal ◽  
Differential Mobility ◽  
Unusual Behavior ◽  
Velocity Overshoot ◽  
Ac Electric Field ◽  
Dc Bias ◽  
Miniband Transport

We examine the frequency-dependence of carrier drift-velocity in superlattice miniband conduction for a small signal ac electric field superposed on a dc bias E0. Our determination of the differential mobility is based on an accurate microscopic treatment of phonon and impurity scatterings. At finite E0, the differential mobility exhibits anomalous frequency-dependence: its real part exhibits a broad hump before finally approaching zero at high frequency, and its imaginary part has a marked dip to negative values before going through the conventional maximum. A simple dual-parameter empirical formula adapted from velocity overshoot studies provides excellent fits to this unusual behavior.

New Approach to Negative Differential Conductance with High Peak-to-Valley Ratio in Silicon

2000 ◽  
Vol 39 (Part 1, No. 4B) ◽  
pp. 2246-2250 ◽  
Author(s):  
Junji Koga ◽  
Celine Vanderstraeten ◽  
Shin-ichi Takagi ◽  
Akira Toriumi
Keyword(s):  
High Peak ◽  
Differential Conductance ◽  
Negative Differential Conductance ◽  
New Approach ◽  
Peak To Valley Ratio

scholarly journals Giant Spin Current Rectification Due to the Interplay of Negative Differential Conductance and a Non-Uniform Magnetic Field

Entropy ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 1311
Author(s):  
Kang Hao Lee ◽  
Vinitha Balachandran ◽  
Ryan Tan ◽  
Chu Guo ◽  
Dario Poletti
Keyword(s):  
Magnetic Field ◽  
Uniform Magnetic Field ◽  
Spin Current ◽  
System Size ◽  
Differential Conductance ◽  
Many Body ◽  
Negative Differential Conductance ◽  
Ferromagnetic Domains ◽  
Current Rectification ◽  
High Degree

In XXZ chains with large enough interactions, spin transport can be significantly suppressed when the bias of the dissipative driving becomes large enough. This phenomenon of negative differential conductance is caused by the formation of two oppositely polarized ferromagnetic domains at the edges of the chain. Here, we show that this many-body effect, combined with a non-uniform magnetic field, can allow for a high degree of control of the spin current. In particular, by studying all of the possible shapes of local magnetic fields potentials, we find that a configuration in which the magnetic field points up for half of the chain and down for the other half, can result in giant spin-current rectification, for example, up to 108 for a system with only 8 spins. Our results show clear indications that the rectification can increase with the system size.

Negative differential conductance in two-dimensional electron grids

2008 ◽  
Vol 92 (5) ◽  
pp. 052104 ◽  
Author(s):  
W. Pan ◽  
S. K. Lyo ◽  
J. L. Reno ◽  
J. A. Simmons ◽  
D. Li ◽  
...  
Keyword(s):  
Differential Conductance ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Negative Differential Conductance

Pseudosaturation and Negative Differential Conductance in Graphene Field-Effect Transistors

2013 ◽  
Vol 60 (3) ◽  
pp. 985-991 ◽  
Author(s):  
Alfonso Alarcon ◽  
Viet-Hung Nguyen ◽  
Salim Berrada ◽  
Damien Querlioz ◽  
Jérôme Saint-Martin ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Differential Conductance ◽  
Negative Differential Conductance
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