Gate-Controlled Tomonaga-Luttinger Liquid and Atomic-Like Behaviors in Peapod Quantum Dots

2007 ◽  
Vol 121-123 ◽  
pp. 545-548
Author(s):  
J. Mizubayashi ◽  
J. Haruyama ◽  
I. Takesue ◽  
T. Okazaki ◽  
Hisanori Shinohara ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanotube ◽  
Gate Voltage ◽  
Electron Spectroscopy ◽  
Luttinger Liquid ◽  
Power Laws ◽  
Back Gate ◽  
Energy Relationships ◽  
Quantum Phenomena ◽  
A Chain

Anomalously high values of power α (1.6 < α < 12) are found in power laws in conductance versus energy relationships in carbon-nanotube peapod quantum dots, encapsulating a chain of C60 molecules. This power is controllable by the applied back gate voltage. Atomic-like behaviors with doubly degenerate ground states are also found by single electron spectroscopy. They reveal that a portion of power originates from the Tomonaga-Luttinger liquid via the occupied electronic levels, which originate from the subbands unique to the peapods. This observation also clarify that the encapsulated C60 molecules do not directly contribute to the above quantum phenomena in peapods.

PHOTON-ASSISTED TRANSPORT IN CARBON NANOTUBE MESOSCOPIC DEVICE

2011 ◽  
Vol 10 (03) ◽  
pp. 419-426 ◽  
Author(s):  
ATTIA A. AWADALLAH ◽  
ADEL H. PHILLIPS ◽  
AZIZ N. MINA ◽  
RIHAM R. AHMED
Keyword(s):  
Carbon Nanotube ◽  
Quantum Dot ◽  
Photon Energy ◽  
Gate Voltage ◽  
Coulomb Blockade ◽  
Oscillatory Behavior ◽  
Metal Contacts ◽  
Computing Systems ◽  
Back Gate ◽  
Proposed Model

The aim of the present paper is to investigate the quantum transport properties of a mesoscopic device under the influence of gate voltage and photon energy. A model for such mesoscopic devices is proposed as two metal contacts are deposited on the carbon nanotube quantum dot to serve as source and drain electrodes. The conducting substrate is the gate electrode in this three-terminal mesoscopic device. Another metallic gate is used to govern the electrostatics and the switching of carbon nanotube channel. The substrate at the carbon nanotube quantum dot contacts are controlled by the back gate. Both effects of the photons energy and gate voltage are investigated. The photon-assisted tunneling probability is deduced by solving Dirac equation. Then the current is deduced according to Landauer–Buttiker formula. The quantum capacitance for the device is deduced in terms of density of states. Oscillatory behavior of the current is observed which is due to the Coulomb blockade oscillations. It was found, also, that the peak heights of the dependence of the current on the parameters under study are strongly affected by the interplay between the tunneled electrons and the photon energy. This interplay affects the sidebands resonance. The results obtained in this study are found to be in concordant with those in the literature, which confirm the correctness of the proposed model. This study is valuable for nanotechnology applications, e.g., photodetector devices and solid state quantum computing systems and quantum information processes.

Optical bistability induced by spin–orbit coupling in the carbon-nanotube quantum dots

2016 ◽  
Vol 55 (5) ◽  
pp. 1090 ◽  
Author(s):  
Wei Liu ◽  
Hongjun Zhang ◽  
Hui Sun ◽  
Qiaolin Zhang ◽  
Dandan Wang
Keyword(s):  
Quantum Dots ◽  
Carbon Nanotube ◽  
Optical Bistability ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit

Capacitance evaluation of compact silicon triple quantum dots by simultaneous gate voltage sweeping

2016 ◽  
Vol 120 (23) ◽  
pp. 234502 ◽  
Author(s):  
Takafumi Uchida ◽  
Mingyu Jo ◽  
Atsushi Tsurumaki-Fukuchi ◽  
Masashi Arita ◽  
Akira Fujiwara ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Gate Voltage ◽  
Triple Quantum Dots

Carbon nitride quantum dots tethered on CNTs for the electrochemical detection of dopamine and uric acid

2021 ◽  
Vol 45 (14) ◽  
pp. 6263-6272
Author(s):  
Biyas Posha ◽  
Narayanan Asha ◽  
N. Sandhyarani
Keyword(s):  
Quantum Dots ◽  
Uric Acid ◽  
Carbon Nanotube ◽  
Electrochemical Detection ◽  
Carbon Nitride ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

A 0D–1D CNQDs/f-CNT architecture composed of 0D CNQDs tethered on a 1D functionalized multiwalled carbon nanotube (f-CNT) network was used for dopamine sensing.

Graphene quantum dots–carbon nanotube hybrid arrays for supercapacitors

2013 ◽  
Vol 24 (19) ◽  
pp. 195401 ◽  
Author(s):  
Yue Hu ◽  
Yang Zhao ◽  
Gewu Lu ◽  
Nan Chen ◽  
Zhipan Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanotube ◽  
Graphene Quantum Dots

scholarly journals Sensitivity Study of Polysilicon Nanowire Based on Scattering and Quantum Mechanics Models

2018 ◽  
Vol 201 ◽  
pp. 01002
Author(s):  
Aanand ◽  
Gene Sheu ◽  
Syed Sarwar Imam ◽  
Shao Wei Lu ◽  
Shao-Ming Yang ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Gate Voltage ◽  
Drain Current ◽  
Sensitivity Study ◽  
Compact Model ◽  
Current Sensitivity ◽  
Back Gate ◽  
Mechanics Model ◽  
Theoretical Predictions ◽  
Current Characteristics

In this paper, we report nanowire drain saturation current sensitivity property to measure femtomol level change in drain current due to different proteins i.e. DNA with numerical simulation and fabricated polysilicon nanowire based on the theoretical predictions. In addition, the drain current will also be affected by the back-gate voltage and will increase as the back-gate voltage increases. A 3-dimensional Synopsis tool is used to investigate the drain current behavior for a polysilicon nanowire. The scattering compact model reported result of detailed numerical calculation shows in good agreement, indicating the usefulness of scattering compact model. Whereas 3D synopsis unable to explain the whole region of the drain current characteristics in linear region which uses quantum mechanics model approach.

Terahertz Spectroscopy of Individual Carbon Nanotube Quantum Dots

Nano Letters ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 242-246 ◽  
Author(s):  
Takuma Tsurugaya ◽  
Kenji Yoshida ◽  
Fumiaki Yajima ◽  
Maki Shimizu ◽  
Yoshikazu Homma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanotube ◽  
Terahertz Spectroscopy
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