SHOT NOISES IN A CORRELATED TUNNELING CURRENT

1993 ◽  
Vol 07 (17) ◽  
pp. 1159-1165 ◽  
Author(s):  
YU. M. GALPERIN ◽  
ULRIK HANKE ◽  
K. A. CHAO ◽  
NANZHI ZOU
Keyword(s):  
Coulomb Blockade ◽  
Electron Tunneling ◽  
Tunneling Current ◽  
Noise Spectrum ◽  
Frequency Noise ◽  
Tunneling System ◽  
Noise Spectroscopy ◽  
Single Electron Tunneling ◽  
Theoretical Predictions ◽  
Existing Result

An analytical expression for shot noises in a correlated sequential tunneling current has been derived by solving the Master equation exactly. The existing result for the simplest case of Pauli correlation is easily reproduced. Our theory is applied to the Coulomb blockade single-electron tunneling system with two tunnel junctions. Given capacitances and resistances of the system, both the suppressed zero-frequency shot noise and the entire finite-frequency noise spectrum are obtained, which are much more complicated than the simplest Pauli correlation case. Our theoretical predictions, after being confirmed experimentally, will introduce the noise spectroscopy as a tool to investigate correlated tunneling current.

SINGLE-ELECTRON TUNNELING IN DOUBLE-BARRIER NANOSTRUCTURES

1992 ◽  
Vol 06 (13) ◽  
pp. 2321-2343 ◽  
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.

Detection of the single electron tunneling noise using coulomb blockade electrometer

1996 ◽  
Vol 46 (S4) ◽  
pp. 2281-2282 ◽  
Author(s):  
A. B. Zorin ◽  
V. A. Krupenin ◽  
S. V. Lotkhov ◽  
J. Niemeyer ◽  
D. E. Presnov ◽  
...  
Keyword(s):  
Coulomb Blockade ◽  
Electron Tunneling ◽  
Single Electron ◽  
Single Electron Tunneling

ROOM TEMPERATURE TUNNELING CHARACTERISTICS OF ULTRA-SMALL NORMAL JUNCTIONS

1992 ◽  
Vol 06 (05) ◽  
pp. 273-280 ◽  
Author(s):  
M.D. REEVE ◽  
O.G. SYMKO ◽  
R. LI
Keyword(s):  
Scanning Tunneling Microscope ◽  
Coulomb Blockade ◽  
Room Temperature ◽  
Tunnel Junctions ◽  
Electron Tunneling ◽  
Single Electron ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Single Electron Tunneling ◽  
Coulomb Staircase

Tunneling studies between a Scanning Tunneling Microscope (STM)-controlled fine NbN tip and a NbN thin film show single electron tunneling characteristics at room temperature. The I-V curves display the Coulomb blockade and the Coulomb staircase caused by single electron charging of a series combination of two tunnel junctions. These room temperature observations indicate that it may be possible to operate single-electron-based devices in non-cryogenic regimes.

scholarly journals Electron counting of single-electron tunneling current

2004 ◽  
Vol 84 (13) ◽  
pp. 2343-2345 ◽  
Author(s):  
T. Fujisawa ◽  
T. Hayashi ◽  
Y. Hirayama ◽  
H. D. Cheong ◽  
Y. H. Jeong
Keyword(s):  
Electron Tunneling ◽  
Tunneling Current ◽  
Single Electron ◽  
Electron Counting ◽  
Single Electron Tunneling

scholarly journals COULOMB BLOCKADE IN GRAPHENE QUANTUM DOTS

2012 ◽  
Vol 27 (01) ◽  
pp. 1350008 ◽  
Author(s):  
QIONG MA ◽  
TAO TU ◽  
LI WANG ◽  
CHEN ZHOU ◽  
ZHI-RONG LIN ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Dots ◽  
Line Shape ◽  
Low Temperatures ◽  
Coulomb Blockade ◽  
Electron Tunneling ◽  
Graphene Quantum Dots ◽  
Single Electron ◽  
Single Electron Tunneling ◽  
Conductance Spectrum

We study the conductance spectrum of graphene quantum dots, both single- and multiple-dot cases. The single electron tunneling through a graphene dot is investigated and the periodicity, amplitude and line shape of the Coulomb blockade oscillations at low temperatures are obtained, which are consistent with the recent experimental observations. Further, we discuss the transport behavior when multiple dots are assembled in array and find a phase transition of conductance spectra from individual Coulomb blockade to collective Coulomb blockade.

scholarly journals Coulomb Blockade Effect in Well-Arranged 2D Arrays of Palladium Nano-Islands for Hydrogen Detection at Room Temperature: A Modeling Study

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 835
Author(s):  
Mahdi Khaje ◽  
Hassan Sedghi ◽  
Hadi Goudarzi ◽  
Mohammad Taghi Ahmadi ◽  
Seyed Saeid Rahimian Koloor ◽  
...  
Keyword(s):  
Power Consumption ◽  
Threshold Voltage ◽  
Coulomb Blockade ◽  
Room Temperature ◽  
Electron Tunneling ◽  
Pd Nanoparticles ◽  
Space Technology ◽  
Hydrogen Detection ◽  
Current Voltage ◽  
Single Electron Tunneling

The fast growth of hydrogen usage as a clean fuel in civil applications such as transportation, space technology, etc. highlights the importance of the reliable detection of its leakage and accumulation under explosion limit by sensors with a low power consumption at times when there is no accumulation of hydrogen in the environment. In this research, a new and efficient mechanism is presented for hydrogen detection—using the Coulomb blockade effect in a well-arranged 2D array of palladium nano-islands—which can operate at room temperature. We demonstrated that under certain conditions of size distribution and the regularity of palladium nano-islands, with selected sizes of 1.7, 3 and 6.1 nm, the blockade threshold will appear in current-voltage (IV) characteristics. In reality, it will be achieved by the inherent uncertainty in the size of the islands in nano-scale fabrication or by controlling the size of nanoparticles from 1.7 to 6.1 nm, considering a regular arrangement of nanoparticles that satisfies single-electron tunneling requirements. Based on the simulation results, the threshold voltage is shifted towards lower ones due to the expansion of Pd nanoparticles exposed to the environment with hydrogen concentrations lower than 2.6%. Also, exploring the features of the presented structure as a gas sensor, provides robustness against the Gaussian variation in nano-islands sizes and temperature variations. Remarkably, the existence of the threshold voltage in the IV curve and adjusting the bias voltage below this threshold leads to a drastic reduction in power consumption. There is also an improvement in the minimum detectable hydrogen concentration as well as the sensor response.

Sign in / Sign up

Export Citation Format

Share Document