arXiv subjects

Q. Q. Sun

Publications and source records attributed to Q. Q. Sun.

3 recordsLinked to original sources

arXiv2012

The critical temperature regions in resistive switching

Critical temperature regions for resistive switching were found based on HfAlO resistive switching memory. From 5 K to 300 K, the resistive switching appears at 60 K, and then a reversible bipolar switching between the two states is observed at above 150 K. It is suggested that the resistive switching characteristics of the binary transitional metal oxides are governed by thermal assisted percolating conductive paths. The process of charge trap/de-trapping under the external electrical field plays a dominated role with the assumption of the same Joule heating generated by internal conductive filament at different temperatures.

cond-mat.mes-hall↗

arXiv2007

Potentials of Coupled Quintessence Based on a Dilaton

In this paper, we regard dilaton in Weyl-scaled induced gravitational theory as coupled Quintessence, which is called DCQ model by us. Parametrization of the dark energy model is a good method by which we can construct the scalar potential directly from the effective equation of state function $ω_σ(z)$ describing the properties of the dark energy. Applying this method to the DCQ model, we consider four parametrizations of $ω(z)$ and investigate the features of the constructed DCQ potentials, which possess two different evolutive behaviors called "O" mode and "E" mode. Lastly, we comprise the results of the constructed DCQ model with those of quintessence model numerically.

hep-th↗

arXiv2006

Born-Infeld Type Phantom Model in the $ω-ω'$ Plane

In this paper, we investigate the dynamics of Born-Infeld(B-I) phantom model in the $ω-ω'$ plane, which is defined by the equation of state parameter for the dark energy and its derivative with respect to $N$(the logarithm of the scale factor $a$). We find the scalar field equation of motion in $ω-ω'$ plane, and show mathematically the property of attractor solutions which correspond to $ω_ϕ\sim-1$, $Ω_ϕ=1$, which avoid the "Big rip" problem and meets the current observations well.

hep-th↗