Quantum paraelectric state and critical behavior in Sn(Pb)2P2S(Se)6 ferroelectrics

2020 ◽  
Vol 128 (23) ◽  
pp. 234105
Author(s):  
I. Zamaraite ◽  
V. Liubachko ◽  
R. Yevych ◽  
A. Oleaga ◽  
A. Salazar ◽  
...  
Keyword(s):  
Critical Behavior ◽  
Quantum Paraelectric ◽  
Paraelectric State

Quantum paraelectric state in virtual ferroelectrics

1994 ◽  
Vol 153 (1) ◽  
pp. 137-142
Author(s):  
S. A. Ktitorov ◽  
L. Jastrabik
Keyword(s):  
Quantum Paraelectric ◽  
Paraelectric State

NQR study of neutral–ionic phase transition and quantum paraelectric state in organic charge-transfer complexes

2008 ◽  
Vol 10 (12) ◽  
pp. 1752-1756 ◽  
Author(s):  
Fumitatsu Iwase ◽  
Kazuya Miyagawa ◽  
Kazushi Kanoda ◽  
Sachio Horiuchi ◽  
Yoshinori Tokura
Keyword(s):  
Phase Transition ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Quantum Paraelectric ◽  
Paraelectric State

Broad Doublet Spectra in the Quantum Paraelectric State of SrTiO3

2015 ◽  
Vol 485 (1) ◽  
pp. 20-26
Author(s):  
Shota Nakamura ◽  
Yuhji Tsujimi
Keyword(s):  
Quantum Paraelectric ◽  
Paraelectric State

scholarly journals Quantum paraelectricity and induced ferroelectricity by germanium doping of (PbySn1–y)2P2S(Se)6 single crystals

2020 ◽  
Vol 60 (2) ◽  
Author(s):  
Ilona Zamaraitė ◽  
Andrius Džiaugys ◽  
Yulian Vysochanskii ◽  
Jūras Banys
Keyword(s):  
Dielectric Permittivity ◽  
Single Crystals ◽  
Low Temperatures ◽  
Dielectric Constants ◽  
Dielectric Study ◽  
Quantum Paraelectric ◽  
Temperature Dependences ◽  
Paraelectric State

In this paper we report a dielectric study on four single crystals Pb2P2S6, (Pb0.98Ge0.02)2P2S6, (Pb0.7Sn0.3)2P2S6 + 5% Ge and (Pb0.7Sn0.3)2P2Se6 + 5% Ge down to 20 K. A new quantum paraelectric state was reported in the Ge-doped samples at low temperatures. In all of these materials the non-classical T2 temperature dependences of inverse dielectric permittivity were observed. The dielectric constants of Pb2P2S6-based single crystals were measured between 20 and 300 K. The temperature dependences of dielectric permittivity were analysed on the basis of Barrett’s model as a signature of quantum paraelectricity.

A Review of Conformal Field Theory in 2D

2014 ◽  
Vol 6 (2) ◽  
pp. 1079-1105
Author(s):  
Rahul Nigam
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Conformal Field Theory ◽  
Statistical Mechanics ◽  
Critical Behavior ◽  
Verma Module ◽  
Virasoro Algebra ◽  
Quantum Field ◽  
Conformal Field ◽  
Insight Into

In this review we study the elementary structure of Conformal Field Theory in which is a recipe for further studies of critical behavior of various systems in statistical mechanics and quantum field theory. We briefly review CFT in dimensions which plays a prominent role for example in the well-known duality AdS/CFT in string theory where the CFT lives on the AdS boundary. We also describe the mapping of the theory from the cylinder to a complex plane which will help us gain an insight into the process of radial quantization and radial ordering. Finally we will develop the representation of the Virasoro algebra which is the well-known "Verma module".  

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