BERRY'S PHASE AND ORGANIC SALT WITH CHARGE TRANSFER

2002 ◽  
Vol 16 (03) ◽  
pp. 57-67
Author(s):  
A. C. AGUIAR PINTO ◽  
M. T. THOMAZ ◽  
R. BRUNO
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Charge Transfer ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Adiabatic Limit ◽  
Organic Salt ◽  
Berry's Phase ◽  
Berry’S Phase

We consider the dynamics of a dimer of the organic salt N-methyl-M-ethylmorpholinium-tetracyanoquinodimethane [MEM(TCNQ)2] in the presence of an external precessing magnetic field. We derive the influence of Berry's phases on the magnetization and electric dipole moment per site of the organic salt in the adiabatic limit.

Electroabsorption spectra of push–pull porphyrins in solution and in solid films

2015 ◽  
Vol 19 (01-03) ◽  
pp. 527-534
Author(s):  
Kamlesh Awasthi ◽  
Hung-Yu Hsu ◽  
Hung-Chu Chiang ◽  
Chi-Lun Mai ◽  
Chen-Yu Yeh ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Charge Transfer ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Ground State ◽  
Benzene Solution ◽  
Solid Films ◽  
The One ◽  
Interfacial Charge

Polarized electroabsorption (E-A) spectra of highly efficient porphyrin sensitizers (YD2 and YD2-oC8) have been measured in benzene solution. Polarized E-A spectra of these push–pull porphyrins embedded in poly(methyl methacrylate) films or sensitized on TiO 2 films are also observed. Based on the analysis of the E-A spectra, the magnitude of the electric dipole moment both in the ground state and in the lowest excited state have been evaluated in solution and in solid films. The electric dipole moment in the excited state of these compounds is very large on TiO 2 films, suggesting the interfacial charge transfer on TiO 2 surface following photoexcitation of porphyrin dyes. The electric dipole moment in the excited state evaluated from the E-A spectra is very different from the one evaluated from the electrophotoluminescence spectra on TiO 2, suggesting that the strong local field of TiO 2 films is applied to the fluorescing dyes attached to TiO 2 films.

scholarly journals Quark electric dipole moment induced by magnetic field

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
P. V. Buividovich ◽  
M. N. Chernodub ◽  
E. V. Luschevskaya ◽  
M. I. Polikarpov
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole

scholarly journals nEDM experiment at PSI: Data-taking strategy and sensitivity of the dataset

2019 ◽  
Vol 219 ◽  
pp. 02001 ◽  
Author(s):  
C. Abel ◽  
N.J. Ayres ◽  
G. Ban ◽  
G. Bison ◽  
K. Bodek ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Neutron Electric Dipole Moment ◽  
Systematic Effects ◽  
Paul Scherrer ◽  
Coherent Picture ◽  
The Magnetic Field ◽  
Better Than

We report on the strategy used to optimize the sensitivity of our search for a neutron electric dipole moment at the Paul Scherrer Institute. Measurements were made upon ultracold neutrons stored within a single chamber at the heart of our apparatus. A mercury cohabiting magnetometer together with an array of cesium magnetometers were used to monitor the magnetic field, which was controlled and shaped by a series of precision field coils. In addition to details of the setup itself, we describe the chosen path to realize an appropriate balance between achieving the highest statistical sensitivity alongside the necessary control on systematic effects. The resulting irreducible sensitivity is better than 1 × 10−26e cm. This contribution summarizes in a single coherent picture the results of the most recent publications of the collaboration.

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