Dynamics of amorphous polymers in the temperature region 2– where the standard model of low-temperature glasses begin to fail: studies by single molecule spectroscopy and comparison with photon echo data

2004 ◽  
Vol 107 (1-4) ◽  
pp. 287-297 ◽  
Author(s):  
Yu.G Vainer ◽  
A.V Naumov ◽  
M Bauer ◽  
L Kador
Keyword(s):  
Low Temperature ◽  
Standard Model ◽  
Single Molecule ◽  
Temperature Region ◽  
Photon Echo ◽  
Amorphous Polymers ◽  
Single Molecule Spectroscopy ◽  
The Standard Model

scholarly journals В каких случаях и почему стандартная модель туннелирующих двухуровневых систем неадекватно описывает низкотемпературную внутреннюю динамику реальных стекол

2019 ◽  
Vol 127 (7) ◽  
pp. 46
Author(s):  
Ю.Г. Вайнер
Keyword(s):  
Low Temperature ◽  
Standard Model ◽  
Single Molecule ◽  
Local Level ◽  
Spectral Dynamics ◽  
Molecular Systems ◽  
Sample Shape ◽  
The Standard Model ◽  
Two Level Systems ◽  
Fluorescent Molecules

AbstractExperiments carried out in recent years using single-molecule spectroscopy to study the low-temperature dynamics of some molecular solid-state media with a disordered internal structure made it possible to obtain new information on the dynamics of such media at the local level. In some substances, the time-dependent behavior of the majority of individual spectra of single fluorescent molecules introduced into the studied medium as a local spectral probe corresponded to the predictions of the standard model of tunneling two-level systems. In others, the behavior of most of the spectra of single molecules was more complicated, which it is difficult to describe in the framework of the standard model. This paper is devoted to the analysis of the results of studies of low-temperature spectral dynamics of single fluorescent molecules in a number of disordered molecular systems (amorphous polyisobutylene, toluene, cumene, propylene carbonate). The observed deviations from the predictions of the theory are associated with the microstructure of the systems under study and the sample shape. Possible reasons for the deviations of the observed local spectral dynamics from the predictions of the standard model of tunneling two-level systems are discussed. Inadequately.

scholarly journals Low-temperature dynamics in a dye-doped polymer: correspondence between the data obtained by photon echo and single molecule spectroscopy

2018 ◽  
Vol 190 ◽  
pp. 04008
Author(s):  
Kamil Karimullin ◽  
Andrei Naumov
Keyword(s):  
Low Temperature ◽  
Single Molecule ◽  
Vibrational Relaxation ◽  
Low Temperatures ◽  
Photon Echo ◽  
Single Molecule Spectroscopy ◽  
Dye Molecules ◽  
Wide Range ◽  
Temperature Dynamics ◽  
Doped Polymer

Low temperature dynamics (tunneling and vibrational relaxation) in doped polyisobutylene film has been reinvestigated using 2-pulse incoherent photon echo (2IPE) and compared with single-molecule spectroscopy (SMS) data. It has been shown that in a very wide range of low temperatures the 2IPE gives optical dephasing times which correspond to the narrowest zero-phonon lines of single dye molecules.

scholarly journals Low temperature electroweak phase transition in the Standard Model with hidden scale invariance

2018 ◽  
Vol 776 ◽  
pp. 48-53 ◽  
Author(s):  
Suntharan Arunasalam ◽  
Archil Kobakhidze ◽  
Cyril Lagger ◽  
Shelley Liang ◽  
Albert Zhou
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Standard Model ◽  
Scale Invariance ◽  
Electroweak Phase Transition ◽  
The Standard Model
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