scholarly journals Phase transition, spin-charge separation, and spin filtering in a quantum dot

2006 ◽  
Vol 73 (20) ◽  
Author(s):  
Michael Pustilnik ◽  
László Borda
Keyword(s):  
Phase Transition ◽  
Quantum Dot ◽  
Charge Separation ◽  
Spin Filtering

The direct observation of charge separation dynamics in CdSe quantum dots/cobaloxime hybrids

2016 ◽  
Vol 18 (6) ◽  
pp. 4300-4303 ◽  
Author(s):  
J. Huang ◽  
Y. Tang ◽  
K. L. Mulfort ◽  
X. Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Charge Separation ◽  
Cdse Quantum Dots ◽  
X Ray ◽  
Molecular Catalyst ◽  
Cdse Quantum Dot ◽  
Photoinduced Charge Separation ◽  
X Ray Absorption ◽  
Photoinduced Charge

In this work, we investigated photoinduced charge separation dynamics in a CdSe quantum dot/cobaloxime molecular catalyst hybrid using the combination of transient optical (OTA) and X-ray absorption (XTA) spectroscopy.

KONDO EFFECT AND SPIN-CHARGE SEPARATION IN QUANTUM DOTS

2001 ◽  
Vol 15 (10n11) ◽  
pp. 1426-1442
Author(s):  
L. I. GLAZMAN ◽  
F. W. J. HEKKING ◽  
A. I. LARKIN
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Coulomb Blockade ◽  
Kondo Effect ◽  
Broad Band ◽  
Single Mode ◽  
Kondo Temperature ◽  
Average Charge ◽  
Opposite Case ◽  
Anderson Impurity Model

The Kondo effect in a quantum dot is discussed. In the standard Coulomb blockade setting, tunneling between the dot and the leads is weak, the number of electrons in the dot is well-defined and discrete; the Kondo effect may be considered in the framework of the conventional one-level Anderson impurity model. It turns out however, that the Kondo temperature TK in the case of weak tunneling is extremely low. In the opposite case of almost reflectionless single-mode junctions connecting the dot to the leads, the average charge of the dot is not discrete. Surprisingly, its spin may remain quantized: s=1/2 or s=0, depending (periodically) on the gate voltage. Such a "spin-charge separation" occurs because, unlike an Anderson impurity, a quantum dot carries a broad-band, dense spectrum of discrete levels. In the doublet state, the Kondo effect develops with a significantly enhanced TK. Like in the weak-tunneling regime, the enhanced TK exhibits strong mesoscopic fluctuations. The statistics of the fluctuations is universal, and related to the Porter-Thomas statistics of the wave function fluctuations.

scholarly journals Spin-filtering through excited states in double-quantum-dot pumps

2006 ◽  
Vol 74 (3) ◽  
Author(s):  
Rafael Sánchez ◽  
Ernesto Cota ◽  
Ramón Aguado ◽  
Gloria Platero
Keyword(s):  
Quantum Dot ◽  
Excited States ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Spin Filtering

Effect of Surface Ligand on Charge Separation and Recombination at CsPbI3 Perovskite Quantum Dot/TiO2 Interfaces

2019 ◽  
Vol 123 (35) ◽  
pp. 21415-21421 ◽  
Author(s):  
Qiongyi Shang ◽  
Brandon D. Piercy ◽  
Mark D. Losego ◽  
Tianquan Lian
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Surface Ligand ◽  
Effect Of Surface

scholarly journals Perovskite quantum dot solar cells: Mapping interfacial energetics for improving charge separation

Nano Energy ◽  
2020 ◽  
Vol 78 ◽  
pp. 105319
Author(s):  
Chuanxiao Xiao ◽  
Qian Zhao ◽  
Chun-Sheng Jiang ◽  
Yinong Sun ◽  
Mowafak M. Al-Jassim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Charge Separation ◽  
Quantum Dot Solar Cells ◽  
Interfacial Energetics

Molybdenum Disulfide Nanosheet/Quantum Dot Dynamic Memristive Structure Driven by Photoinduced Phase Transition

Small ◽  
2019 ◽  
Vol 15 (45) ◽  
pp. 1903809 ◽  
Author(s):  
Xiao Fu ◽  
Lei Zhang ◽  
Hak D. Cho ◽  
Tae Won Kang ◽  
Dejun Fu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Dot ◽  
Molybdenum Disulfide

Enhancement of the Yield of Photoinduced Charge Separation in Zinc Porphyrin–Quantum Dot Complexes by a Bis(dithiocarbamate) Linkage

2015 ◽  
Vol 119 (9) ◽  
pp. 5195-5202 ◽  
Author(s):  
Shengye Jin ◽  
Mario Tagliazucchi ◽  
Ho-Jin Son ◽  
Rachel D. Harris ◽  
Kenneth O. Aruda ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Charge Separation ◽  
Zinc Porphyrin ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Electrically tunable spin filtering for electron tunneling between spin-resolved quantum Hall edge states and a quantum dot

2014 ◽  
Vol 104 (26) ◽  
pp. 263101 ◽  
Author(s):  
H. Kiyama ◽  
T. Fujita ◽  
S. Teraoka ◽  
A. Oiwa ◽  
S. Tarucha
Keyword(s):  
Quantum Dot ◽  
Electron Tunneling ◽  
Quantum Hall ◽  
Edge States ◽  
Spin Filtering

scholarly journals First-Order0−πQuantum Phase Transition in the Kondo Regime of a Superconducting Carbon-Nanotube Quantum Dot

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Romain Maurand ◽  
Tobias Meng ◽  
Edgar Bonet ◽  
Serge Florens ◽  
Laëtitia Marty ◽  
...  
Keyword(s):  
Phase Transition ◽  
Carbon Nanotube ◽  
Quantum Dot
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