Quantum Paraelectric States in SrTiO3and KTaO3: Barrett Model, Vendik Model, and Quantum Criticality
نویسندگان
چکیده
منابع مشابه
Third-order dielectric susceptibility in a model quantum paraelectric.
In the context of perovskite quantum paraelectrics, we study the effects of a quadrupolar interaction Jq, in addition to the standard dipolar one Jd. We concentrate here on the nonlinear dielectric response χ (3) P , as the main response function sensitive to quadrupolar (in our case antiquadrupolar) interactions. We employ a 3D quantum four-state lattice model and mean-field theory. The result...
متن کاملQuantum Criticality in the Biased Dicke Model
The biased Dicke model describes a system of biased two-level atoms coupled to a bosonic field, and is expected to produce new phenomena that are not present in the original Dicke model. In this paper, we study the critical properties of the biased Dicke model in the classical oscillator limits. For the finite-biased case in this limit, We present analytical results demonstrating that the excit...
متن کاملQuantum criticality in a generalized Dicke model
We employ a generalized Dicke model to study theoretically the quantum criticality of an extended two-level atomic ensemble interacting with a single-mode quantized light field. Effective Hamiltonians are derived and digonalized to investigate numerically their eigenfrequencies for different quantum phases in the system. Based on the analysis of the eigenfrequencies, an intriguing quantum phase...
متن کاملDesigning and analyzing the quantum efficiency model based on quantum immaterial skills through thematic analysis
The aim of this study was to identify the components of productivity based on intangible quantum skills and provide a model of quantum productivity. This research is fundamental and applied in terms of purpose, which has been done by analytical, exploratory and field methods. The statistical population of the present study was professors and experts in the field of sports management and manager...
متن کاملMott Quantum Criticality in the Anisotropic 2D Hubbard Model.
We present evidence for Mott quantum criticality in an anisotropic two-dimensional system of coupled Hubbard chains at half-filling. In this scenario emerging from variational cluster approximation and cluster dynamical mean-field theory, the interchain hopping t_{⊥} acts as a control parameter driving the second-order critical end point T_{c} of the metal-insulator transition down to zero at t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 2016
ISSN: 0031-9015,1347-4073
DOI: 10.7566/jpsj.85.074703