scholarly journals Structures and Properties of New Organic Conductors: BEDT-TTF, BEST and BETS Salts of the HOC2H4SO3− Anion

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 775
Author(s):  
Hiroki Akutsu ◽  
Yuta Koyama ◽  
Scott S. Turner ◽  
Keigo Furuta ◽  
Yasuhiro Nakazawa
Keyword(s):  
Charge Transfer ◽  
Organic Conductors ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Structures And Properties ◽  
The Difference

New bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF)-, bis(ethylenediseleno)tetrathiafulvalene (BEST)- and bis(ethylenedithio)tetraselenafulvalene (BETS)-based organic charge-transfer (CT) salts—α-(BEDT-TTF)3(HOC2H4SO3)2 (1), β-(BEST)3(HOC2H4SO3)2·H2O (2) and α-(BETS)2(HOC2H4SO3)·H2O (3)—have been prepared. Salts 1 and 2 show semiconducting behaviour. Salt 3, which is almost isostructural to α-(BETS)2I3, shows metallic behaviour down to 70 K and then shows a broader metal–insulator transition than that of α-(BETS)2I3. The reason for the difference in behaviour is estimated by the comparison of the Madelung energies of the full set of patterns of possible donor’s charge-ordered and anion’s disordered states.

scholarly journals Electronic structure of negative charge transfer CaFeO3 across the metal-insulator transition

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Paul C. Rogge ◽  
Ravini U. Chandrasena ◽  
Antonio Cammarata ◽  
Robert J. Green ◽  
Padraic Shafer ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Charge Transfer ◽  
Negative Charge ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

Induced ferromagnetism and metal-insulator transition due to a charge transfer effect in silver nanoparticle decorated MoS2

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
Shekhar Bag ◽  
Shatabda Bhattacharya ◽  
Diptiman Dinda ◽  
M. V. Jyothirmai ◽  
Ranjit Thapa ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Silver Nanoparticle ◽  
Transfer Effect ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
A Charge

scholarly journals METAL–INSULATOR TRANSITION IN 3D QUANTUM PERCOLATION

2008 ◽  
Vol 22 (29) ◽  
pp. 5217-5227 ◽  
Author(s):  
IGOR TRAVĚNEC
Keyword(s):  
Geometric Mean ◽  
Finite Size ◽  
Universality Class ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Mobility Edge ◽  
Metal Insulator ◽  
The Difference ◽  
Transition Study ◽  
Energy Plane

We present the metal–insulator transition study of a quantum site percolation model on simple cubic lattice. Transfer matrix method is used to calculate transport properties — Landauer conductance — for the binary distribution of energies. We calculate the mobility edge in disorder (ratio of insulating sites) — energy plane in detail and we find the extremal critical disorder somewhat closer to the classical percolation threshold than formerly reported. We calculate the critical exponent ν along the mobility edge and find it constant and equal to the one of 3D Anderson model, confirming common universality class. Possible exception is the center of the conduction band, where either the single-parameter scaling is not valid anymore, or finite size effects are immense. One of the reasons for such statement is the difference between results from arithmetic and geometric averaging of conductance at special energies. Only the geometric mean yields zero critical disorder in band center, which was theoretically predicted.

scholarly journals Ground-state oxygen holes and the metal–insulator transition in the negative charge-transfer rare-earth nickelates

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Valentina Bisogni ◽  
Sara Catalano ◽  
Robert J. Green ◽  
Marta Gibert ◽  
Raoul Scherwitzl ◽  
...  
Keyword(s):  
Rare Earth ◽  
Charge Transfer ◽  
Ground State ◽  
Negative Charge ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator
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