scholarly journals In Memoriam: Myriam Sarachik

2022 ◽  
Vol 6 (4) ◽  
Author(s):  
Tony Liss ◽  
Parameswaran Nair
Keyword(s):  
Quantum Tunneling ◽  
Kondo Effect ◽  
Molecular Magnets ◽  
Research Career ◽  
Human Spirit ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Scientific Excellence ◽  
The Face ◽  
In Memoriam

Myriam Sarachik passed away on October 7, 2021. Her work on the Kondo effect, the metal-insulator transition, and quantum tunneling in molecular magnets are highlights in her research career. But her lifetime of first-rate work was realized in the face of great adversity. She was a totem of not only scientific excellence, but also of the perseverance of the human spirit.

scholarly journals Characterising the Metal-Insulator Transition in Two Dimensions

2000 ◽  
Vol 53 (4) ◽  
pp. 531 ◽  
Author(s):  
D. Neilson ◽  
J. S. Thakur ◽  
E. Tosatti
Keyword(s):  
Quantum Tunneling ◽  
Two Dimensions ◽  
Insulator Transition ◽  
Electron Systems ◽  
Electron Correlations ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Potential Barriers ◽  
Electron Density And Temperature ◽  
Good Agreement

We investigate the metal—insulator transition in 2D electron systems assuming a percolation mechanism connecting through a network of metallic domains. The size of the domains is determined by the level of disorder and the strength of the electron correlations. The domains are linked through quantum tunneling. We determine the dependence of the resistivity on electron density and temperature by calculating the tunnelling transmission through the potential barriers between the domains. The results are in good agreement with recent experimental measurements.

scholarly journals Quantum-Tunneling-Induced Kondo Effect in Single Molecular Magnets

2006 ◽  
Vol 96 (19) ◽  
Author(s):  
C. Romeike ◽  
M. Wegewijs ◽  
W. Hofstetter ◽  
H. Schoeller
Keyword(s):  
Quantum Tunneling ◽  
Kondo Effect ◽  
Molecular Magnets

Fermi-surface reconstruction close to a pressure-induced metal-insulator transition

2004 ◽  
Vol 114 ◽  
pp. 277-281 ◽  
Author(s):  
J. Wosnitza ◽  
J. Hagel ◽  
O. Stockert ◽  
C. Pfleiderer ◽  
J. A. Schlueter ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Surface Reconstruction ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Fermi Surface Reconstruction

Emergence of size induced metallic state in the ferromagnetic insulating Pr0.8Sr0.2MnO3 manganite: Breaking of surface polarons

2015 ◽  
Vol 8 (2) ◽  
pp. 2084-2093 ◽  
Author(s):  
PROLOY TARAN DAS ◽  
Arun Kumar Nigam ◽  
Tapan Kumar Nath
Keyword(s):  
Transport Properties ◽  
Metallic State ◽  
Temperature Dependent ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
System A ◽  
Surface Disorder ◽  
Bulk System ◽  
Magnetic Transport ◽  
Grain Surface

Nano-dimensional effects on electronic-, magneto-transport properties of granular ferromagnetic insulating (FMI) Pr0.8Sr0.2MnO3 (PSMO) manganite (down to 40 nm) have been investigated in details. From the electronic and magnetic transport properties, a metallic state has been observed in grain size modulation by suppressing the ferromagnetic insulating state of PSMO bulk system. A distinct metal-insulator transition (MIT) temperature around 150 K has been observed in all nanometric samples. The observed insulator to metallic transition with size reduction can be explained with surface polaron breaking model, originates due to enhanced grain surface disorder. This proposed phenomenological polaronic model plays a significant role to understand the polaronic destabilization process on the grain surface regime of these phase separated nano-mangnatie systems. Temperature dependent resistivity and magnetoresistance data in presence of external magnetic fields are investigated in details with various compatible models.

Crystal growth and metal-insulator transition in two-dimensional layered rare-earth palladates

2018 ◽  
Vol 2 (8) ◽  
Author(s):  
Yoshiko Nanao ◽  
Yoshiharu Krockenberger ◽  
Ai Ikeda ◽  
Yoshitaka Taniyasu ◽  
Michio Naito ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Insulator Transition ◽  
Two Dimensional ◽  
Metal Insulator Transition ◽  
Metal Insulator
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