The Resonant Tunneling in Si1-xGex/Si Superlattices

It has been studied that the dependence of tunneling coefficient T on the ratio x of Ge, on the barrier width B L , on the well width W L and on the periodicity N in periodic superlattices Si1-xGex/Si by the method of transfer matrix, and shown in figures. The dependence of peak region width W on the above parameters are discussed in detail, and plotted, those are fitted in functions. These results may be useful to convert a weak mechanical signal into a strong tunneling current signal and to design electron devices based on meso- piezoresistive effect in the superlattices Si1-xGex/Si.

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The Meso- Piezo-Resistive Effects in MEMS/NEMS

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.619 ◽

2007 ◽

Vol 121-123 ◽

pp. 619-622 ◽

Cited By ~ 8

Author(s):

Ting Dun Wen ◽

Li Ping Xu ◽

Ji Jun Xiong ◽

Wen Dong Zhang

Keyword(s):

Acoustic Signal ◽

Strain Distribution ◽

Energy State ◽

Tunneling Current ◽

Electronic Energy ◽

Current Signal ◽

Piezoresistive Effect ◽

Nano Structure ◽

Mechanical Signal ◽

Electric Filed

Meso- piezoresistive effect is proposed, which is defined as “Strain Tuning of the resonant current”, in order to convert a weak mechanical signal into a strong tunneling current signal. If a mechanical signal is acted on an related mechanical nano-structure, the corresponding strain distribution will be produced in the structure; the built- in electric field will be resulted from the strain in system in some conditions; the strain and built-in electric filed will result in the change of electronic energy states; the change of electronic energy state will influence on the value of the tunneling current. Two experimental units are designed, one being used to detect an acoustic signal under sea, other to detect acceleration.

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Self‐consistent analysis of resonant tunneling current

Applied Physics Letters ◽

10.1063/1.97428 ◽

1986 ◽

Vol 49 (19) ◽

pp. 1248-1250 ◽

Cited By ~ 134

Author(s):

Hiroaki Ohnishi ◽

Tsuguo Inata ◽

Shunichi Muto ◽

Naoki Yokoyama ◽

Akihiko Shibatomi

Keyword(s):

Resonant Tunneling ◽

Tunneling Current ◽

Self Consistent

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Erratum: “Valley and spin resonant tunneling current in ferromagnetic/nonmagnetic/ferromagnetic silicene junction” [AIP Advances 6(2), 025307 (2016)]

AIP Advances ◽

10.1063/1.4945269 ◽

2016 ◽

Vol 6 (3) ◽

pp. 039901

Author(s):

Yaser Hajati ◽

Zeinab Rashidian

Keyword(s):

Resonant Tunneling ◽

Tunneling Current

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431 kA/cm2 peak tunneling current density in GaN/AlN resonant tunneling diodes

Applied Physics Letters ◽

10.1063/1.5010794 ◽

2018 ◽

Vol 112 (3) ◽

pp. 033508 ◽

Cited By ~ 22

Author(s):

Tyler A. Growden ◽

Weidong Zhang ◽

Elliott R. Brown ◽

David F. Storm ◽

Katurah Hansen ◽

...

Keyword(s):

Current Density ◽

Resonant Tunneling ◽

Tunneling Current ◽

Resonant Tunneling Diodes ◽

Tunneling Diodes

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RESONANT TUNNELING IN DOUBLE BARRIER SEMICONDUCTOR NANO-STRUCTURES

International Journal of Modern Physics B ◽

10.1142/s0217979295001142 ◽

1995 ◽

Vol 09 (23) ◽

pp. 3039-3051

Author(s):

DILIP K. ROY ◽

AJIT SINGH

Keyword(s):

Quantum Measurement ◽

Current Density ◽

Resonant Tunneling ◽

Tunneling Current ◽

Double Barrier ◽

Tunneling Diode ◽

Nano Structures ◽

Current Densities ◽

Double Barrier Resonant Tunneling ◽

Measurement Approach

The principles of operation of a double barrier resonant tunneling diode (DBRTD) giving rise to negative differential conductivity effect are first reviewed. Next, the physics of resonant tunneling based on (i) the time-independent conventional approach and (ii) the time-dependent quantum measurement approach, as applied to a DBRTD, is discussed. Expressions for the resonant tunneling current densities through the barriers are then derived on the ideas of quantum measurement. Through the well the current, however, flows by the conventional mechanism. The three current density magnitudes are found to be identical under resonant conditions. Finally, an expression for the resonant tunneling current density due to a group of incident electrons is derived.

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THE WIDTH RATIO OF TWO BARRIERS IN RESONANT TUNNELING

Modern Physics Letters B ◽

10.1142/s0217984903005007 ◽

2003 ◽

Vol 17 (03) ◽

pp. 105-109 ◽

Cited By ~ 2

Author(s):

MASATO OHMUKAI

Keyword(s):

Transmission Coefficient ◽

Resonant Tunneling ◽

Width Ratio ◽

Total Width ◽

Barrier Width ◽

Barrier Structure ◽

Double Barrier ◽

Two Parameters ◽

Double Barrier Structure ◽

Two Barriers

Numerical calculations by a transfer matrix method have been performed to obtain the transmission coefficient of rectangular double barrier structures. The dependence of the well width, barrier width and the barrier height was systematically investigated. When the width ratio of the two barriers was varied on condition that a total width was fixed, the transmission coefficient at a resonance is varied while that at a valley region is not. It is concluded that the resonant tunneling is characterized by two parameters: total width and the width ratio. Our results clarify the transition of transmission spectrum from a single barrier to a double barrier structure.

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SINGLE-ELECTRON TUNNELING IN DOUBLE-BARRIER NANOSTRUCTURES

International Journal of Modern Physics B ◽

10.1142/s021797929200116x ◽

1992 ◽

Vol 06 (13) ◽

pp. 2321-2343 ◽

Cited By ~ 3

Author(s):

V.J. GOLDMAN ◽

BO SU ◽

J.E. CUNNINGHAM

Keyword(s):

Coulomb Blockade ◽

Resonant Tunneling ◽

Electron Tunneling ◽

Tunneling Current ◽

Theoretical Models ◽

Single Electron ◽

Double Barrier ◽

Current Voltage ◽

Tunneling Devices ◽

Resonant Tunneling Devices

We review experimental study of charge transport in nanometer double-barrier resonant tunneling devices. Heterostructure material is asymmetric: one barrier is substantially less transparent than the other. Resonant tunneling through size-quantized well states and single-electron charging of the well are thus largely separated in the two bias polarities. When the emitter barrier is more transparent than the collector barrier, electrons accumulate in the well; incremental electron occupation of the well is accompanied by Coulomb blockade leading to sharp steps of the tunneling current. When the emitter barrier is less transparent, the current reflects resonant tunneling of just one electron at a time through size-quantized well states; the current peaks and/or steps (depending on experimental parameters) appear in current-voltage characteristics. Magnetic field and temperature effects are also reviewed. Good agreement is achieved in comparison of many features of experimental data with simple theoretical models.

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