scholarly journals Connecting the SYK Dots

2020 ◽  
Vol 5 (2) ◽  
pp. 37 ◽  
Author(s):  
Dmitri V. Khveshchenko
Keyword(s):  
Quantum Dots ◽  
Density Of States ◽  
Insulator Transition ◽  
Coulomb Energy ◽  
Coulomb Interactions ◽  
Charge Fluctuations ◽  
Metal To Insulator Transition

We study a putative (strange) metal-to-insulator transition in a granular array of the Sachdev–Ye–Kitaev (SYK) quantum dots, each occupied by a large number N ≫ 1 of charge-carrying fermions. Extending the previous studies, we complement the SYK couplings by the physically relevant Coulomb interactions and focus on the effects of charge fluctuations, evaluating the conductivity and density of states. The latter were found to demonstrate marked changes of behavior when the effective inter-site tunneling became comparable to the renormalized Coulomb energy, thereby signifying the transition in question.

Hopping Conduction Near the Metal-Insulator Transition in CdMnTe:In and Evidence for a Magnetic Hard Gap in the Density of States

1994 ◽  
Vol 08 (07) ◽  
pp. 905-912 ◽  
Author(s):  
I. Terry ◽  
T. Penney ◽  
S. von Molnár ◽  
P. Becla
Keyword(s):  
Carrier Concentration ◽  
Density Of States ◽  
Low Temperatures ◽  
Localization Length ◽  
Insulator Transition ◽  
Variable Range Hopping ◽  
Coulomb Interactions ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Magnetic Polarons

A series of resistivity curves is obtained as a function carrier concentration in just one sample of the dilute magnetic persistent photoconductor Cd0.91Mn0.09Te:In. The measurements, made at carrier concentrations approaching the metal-insulator transition, reveal a cross-over from an exp(To/T)1/2 dependence to an exp(EH/T) form when lowering temperature. The exp(To/T)1/2 dependence is characteristic of variable range hopping in the presence of Coulomb interactions, while the energy EH in the activated form is associated with a hard gap in the density of states that is magnetic in origin. All the data are shown to scale onto a single curve. The localization length. ξ, is found to have the same critical dependence on carrier concentration as that of the measured dielectric constant, κ, when approaching the metal-insulator transition. The temperature dependence of the resistivity is interpreted in terms of the orientation of Mn spins by carriers due to the s-d exchange interaction (the formation of magnetic polarons). This model can also account for the large positive and negative magnetoresistance observed in Cd0.91Mn0.09Te:In at low temperatures.

Investigation of the metal-to-insulator transition of N-doped VO2(M1) thin films

2021 ◽  
pp. 149661
Author(s):  
Simon Chouteau ◽  
Sabeur Mansouri ◽  
Mohamed Lemine Ould Ne Mohamedou ◽  
Jérémie Chaillou ◽  
Aminat Oyiza Suleiman ◽  
...  
Keyword(s):  
Thin Films ◽  
Insulator Transition ◽  
Metal To Insulator Transition

Doping controlled metal to insulator transition in the (Bi, Pb)-2212 system

2009 ◽  
Vol 22 (4) ◽  
pp. 045016 ◽  
Author(s):  
R Shabna ◽  
P M Sarun ◽  
S Vinu ◽  
A Biju ◽  
U Syamaprasad
Keyword(s):  
Insulator Transition ◽  
Metal To Insulator Transition

Coulomb interactions and the metal-insulator transition in p-SiGe

2001 ◽  
Vol 11 (2-3) ◽  
pp. 167-170
Author(s):  
P.T Coleridge ◽  
J Lapointe ◽  
R.L Williams ◽  
P Zawadzki
Keyword(s):  
Insulator Transition ◽  
Coulomb Interactions ◽  
Metal Insulator Transition ◽  
Metal Insulator

Metal to Insulator Transition in Films of Molecularly Linked Gold Nanoparticles

2006 ◽  
Vol 96 (15) ◽  
Author(s):  
Amir Zabet-Khosousi ◽  
Paul-Emile Trudeau ◽  
Yoshinori Suganuma ◽  
Al-Amin Dhirani ◽  
Bryan Statt
Keyword(s):  
Gold Nanoparticles ◽  
Insulator Transition ◽  
Metal To Insulator Transition

Metal to insulator transition in Sr 2 Ru 1−x Ir x O 4

2000 ◽  
Vol 61 (12) ◽  
pp. 1989-1999 ◽  
Author(s):  
M.V Rama Rao ◽  
V.G Sathe ◽  
D Sornadurai ◽  
B Panigrahi ◽  
T Shripathi
Keyword(s):  
Insulator Transition ◽  
Metal To Insulator Transition

Structural relaxation, metal-to-insulator transition and pseudo-gap in oxygen deficient НоBa2Cu3O7−δ single crystals

2009 ◽  
Vol 469 (5-6) ◽  
pp. 203-206 ◽  
Author(s):  
R.V. Vovk ◽  
M.A. Obolenskii ◽  
A.A. Zavgorodniy ◽  
I.L. Goulatis ◽  
V.I. Beletskii ◽  
...  
Keyword(s):  
Single Crystals ◽  
Structural Relaxation ◽  
Insulator Transition ◽  
Metal To Insulator Transition
Sign in / Sign up

Export Citation Format

Share Document