A study of interface characteristics in HfAlO/p-Si by deep level transient spectroscopy

Deep level transient spectroscopy (DLTS) and high-frequency capacitance-voltage (HF-CV) measurement are used for the investigation of HfAlO/p-Si interface. The so-called “slow” interface states detected by HF-CV are obtained to be 2.68 × 10¹¹ cm⁻². Combined conventional DLTS with insufficient-filling DLTS (IF-DLTS), the true energy level position of interfacial traps is found to be 0.33 eV above the valance band maximum of silicon, and the density of such “fast” interfacial traps is 1.91 × 10¹² cm⁻² eV⁻¹. The variation of energy level position of such traps with different annealing temperatures indicates the origin of these traps may be the oxide-related traps very close to the HfAlO/Si interface. The interfacial traps’ passivation and depassivation effect of postannealing in forming gas are shown by comparing samples annealed at different temperatures.     

两纠缠原子与光场相互作用系统原子的纠缠特性

研究了两纠缠原子与单模相干态光场相互作用系统中原子纠缠度的时间演化特性,运用全量子理论和数值计算的方法,应用Concurrence纠缠度量标准,讨论了原子初始时刻的纠缠状态和光场强度对两原子纠缠度的影响.结果表明：双原子系统初始纠缠度越大,两原子间的纠缠在演化过程中的峰值也越大;随着光场强度的增加,两原子纠缠度的振荡曲线逐渐表现出崩塌-回复现象,周期性也越来越明显.     

Contact forces in anisotropic frictional granular materials

The probability density functions (PDFs) of contact forces in anisotropic, cohesionless and frictional granular materials are studied numerically and theoretically. Using discrete element simulations of biaxial deformation of a large two-dimensional assembly consisting of 200,000 disks, it is observed that the PDFs for the normal and tangential components of the contact forces depend significantly on contact orientation. The PDFs exhibit exponential decay and the PDF for the tangential component of the contact forces is not always symmetrical with respect to zero tangential force. The shape of the PDF for the normal component of the contact forces changes with shear strain. A qualitative explanation for this change is given that is related to the biaxial deformation mechanism in which the disrupted contacts are predominantly oriented in the direction of the minor principle stress.A maximum entropy method is employed to study these PDFs theoretically, using a prescribed stress tensor as constraint. It is found that the theoretical results correspond qualitatively to many of the results obtained from the discrete element simulations. Discrepancies between theory and simulations are attributed to the fact that the kinematics have not been taken into account in the theory.     

On the Position Representation of Pedram’s Higher Order GUP

In this paper we show that the position representation of the higher order generalized uncertainty principle (HGUP) is also well defined without approximation. We find the simpler form of this representation with a help of the signature of the discriminant of the cubic equation. Using this we discuss the HGUP derivative, HGUP exponential and HGUP trigonometric functions and HGUP-corrected Bohr atom model. Finally we discuss the D-dimensional HGUP algebra and compute the cosmological constant.

     

Tumor shapes effect on metastatic state: A theoretical derivation embedding thermodynamic laws

Breaching away cells from an original primary tumor site and spreading throughout the body is hallmark definition of metastasis. To get the bottom line of this phenomenon, mathematical and thermodynamically based techniques have been developed and are being increasingly applied to help, decipher and forecast tumor pattern disturbing and treatment response. Becoming a primary tumor to metastatic one, remains as hot topic in many studies. In this study, an extensive complicated mathematical model was used and by embedding thermodynamic laws, three primary oversimplifying hypothetical tumors’ shape e.g. cylindrical, spherical, ellipsoidal were theoretically studied. After extracting within tumor flux pressures, we tried to compare aforementioned tumor shapes in terms of becoming a metastatic one e.g. cell rupturing. Our results shown it was not explicitly possible to address which tumor shapes shall get metastatic state (tear down in much earlier time than other shapes), as it was heavily dependent on tumor parameter values. The results of this study could be fairy appealing for both cancer model developer experts, medicines and cancer systems biologist as well.     

High-throughput Synthesis of Solution-Processable van der Waals Heterostructures through Electrochemistry

Two-dimensional van der Waals heterostructures (2D vdWHs) have recently gained widespread attention because of their abundant and exotic properties, which open up many new possibilities for next-generation nanoelectronics. However, practical applications remain challenging due to the lack of high-throughput techniques for fabricating high-quality vdWHs. Here, we demonstrate a general electrochemical strategy to prepare solution-processable high-quality vdWHs, in which electrostatic forces drive the stacking of electrochemically exfoliated individual assemblies with intact structures and clean interfaces into vdWHs with strong interlayer interactions. Thanks to the excellent combination of strong light absorption, interfacial charge transfer, and decent charge transport properties in individual layers, thin-film photodetectors based on graphene/In₂Se₃ vdWHs exhibit great promise for near-infrared (NIR) photodetection, owing to a high responsivity (267 mA W⁻¹), fast rise (72 ms) and decay (426 ms) times under NIR illumination. This approach enables various hybrid systems, including graphene/In₂Se₃, graphene/MoS₂ and graphene/MoSe₂ vdWHs, providing a broad avenue for exploring emerging electronic, photonic, and exotic quantum phenomena.     

Quantum Teleportation of A Four-qubit State by Using Six-qubit Cluster State

We propose a scheme for perfect quantum teleportation of a special form of four-qubit state by using a six-qubit cluster state as quantum channel. In our scheme, the sender only needs six-qubit von-Neumann projective measurements, and the receiver can reconstruct the original four-qubit state by applying the appropriate unitary operation.