Dynamic nuclear polarization and Hanle effect in (In,Ga)As/GaAs quantum dots. Role of nuclear spin fluctuations

2013 ◽  
Author(s):  
I. Ya. Gerlovin ◽  
R. V. Cherbunin ◽  
I. V. Ignatiev ◽  
M. S. Kuznetsova ◽  
S. Yu. Verbin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Spin Fluctuations ◽  
Hanle Effect

scholarly journals Hanle effect in (In,Ga)As quantum dots: Role of nuclear spin fluctuations

2013 ◽  
Vol 87 (23) ◽  
Author(s):  
M. S. Kuznetsova ◽  
K. Flisinski ◽  
I. Ya. Gerlovin ◽  
I. V. Ignatiev ◽  
K. V. Kavokin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nuclear Spin ◽  
Spin Fluctuations ◽  
Hanle Effect

scholarly journals Dynamic Nuclear Polarization in Double Quantum Dots

2010 ◽  
Vol 104 (22) ◽  
Author(s):  
M. Gullans ◽  
J. J. Krich ◽  
J. M. Taylor ◽  
H. Bluhm ◽  
B. I. Halperin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Double Quantum ◽  
Double Quantum Dots

scholarly journals Structure of Colloidal Quantum Dots from Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy

2015 ◽  
Vol 137 (43) ◽  
pp. 13964-13971 ◽  
Author(s):  
Laura Piveteau ◽  
Ta-Chung Ong ◽  
Aaron J. Rossini ◽  
Lyndon Emsley ◽  
Christophe Copéret ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nmr Spectroscopy ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Colloidal Quantum Dots ◽  
Surface Enhanced

scholarly journals The role of the glassy dynamics and thermal mixing in the dynamic nuclear polarization and relaxation mechanisms of pyruvic acid

2014 ◽  
Vol 16 (48) ◽  
pp. 27025-27036 ◽  
Author(s):  
M. Filibian ◽  
S. Colombo Serra ◽  
M. Moscardini ◽  
A. Rosso ◽  
F. Tedoldi ◽  
...  
Keyword(s):  
Relaxation Rate ◽  
Dynamic Nuclear Polarization ◽  
Pyruvic Acid ◽  
Nuclear Polarization ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Relaxation Rates ◽  
Thermal Mixing ◽  
Spin Lattice

In pyruvic acid containing 15 mM trityl below 4 K 13C polarization and spin–lattice relaxation rates are proportional to the spin–lattice relaxation rate of electrons, suggesting an efficient thermal mixing scenario.

Chemically Induced Dynamic Nuclear Polarization During Irradiation of Phenol in the Presence of Amides

1975 ◽  
Vol 53 (16) ◽  
pp. 2459-2464
Author(s):  
Shiv P. Vaish ◽  
Holger E. Chen ◽  
Micha Tomkiewicz ◽  
Robert D. McAlpine ◽  
Michael Cocivera
Keyword(s):  
Carbonyl Group ◽  
Spin Polarization ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Radical Pair ◽  
Hydroxybenzoic Acid ◽  
Nuclear Spin Polarization ◽  
Ph Values ◽  
Chemically Induced

Irradiation of D2O solutions containing various phenols with aliphatic amides at pH values between 9 and 12 results in nuclear spin polarization which is observed as n.m.r. emission signals during irradiation. No polarization is observed for the phenols which include tyrosine, cresol, p-hydroxybenzoic acid, phenol, and others. For the amides which include acetamide, propionamide, N-methylacetamide, and N,N-dimethylacetamide, polarization was observed for only the protons on the carbon bonded to the carbonyl group. Because excited phenolate ions are known to eject electrons, it is proposed that the radical RĊ(O−)NR2 is formed by reaction of the amide with the hydrated electron. The polarization observed for the amides can be explained by reaction of RĊ(O−)NR2 with a benzosemiquinone radical via a radical pair.

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