Optical and transport properties in three-dimensional Dirac and Weyl semimetals

2016 ◽  
Vol 93 (8) ◽  
Author(s):  
C. J. Tabert ◽  
J. P. Carbotte ◽  
E. J. Nicol
Keyword(s):  
Transport Properties ◽  
Three Dimensional ◽  
Weyl Semimetals

Three-dimensional quantum Hall effect in Weyl and double-Weyl semimetals

2018 ◽  
Vol 382 (44) ◽  
pp. 3205-3210
Author(s):  
Zhi-Peng Gao ◽  
Zhi Li ◽  
Dan-Wei Zhang
Keyword(s):  
Hall Effect ◽  
Quantum Hall Effect ◽  
Quantum Hall ◽  
Three Dimensional ◽  
Weyl Semimetals

scholarly journals Irradiated three-dimensional Luttinger semimetal: A factory for engineering Weyl semimetals

2018 ◽  
Vol 97 (20) ◽  
Author(s):  
Sayed Ali Akbar Ghorashi ◽  
Pavan Hosur ◽  
Chin-Sen Ting
Keyword(s):  
Three Dimensional ◽  
Weyl Semimetals

scholarly journals Materials informatics platform with three dimensional structures, workflow and thermoelectric applications

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mingjia Yao ◽  
Yuxiang Wang ◽  
Xin Li ◽  
Ye Sheng ◽  
Haiyang Huo ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electrical Transport ◽  
Density Functional ◽  
Equations Of State ◽  
Three Dimensional ◽  
Density Functional Theory Calculations ◽  
Materials Informatics ◽  
Electrical Transport Properties ◽  
Electron Phonon Coupling ◽  
Materials Genome

AbstractSince the proposal of the “Materials Genome Initiative”, several material databases have emerged and advanced many materials fields. In this work, we present the Materials Informatics Platform with Three-Dimensional Structures (MIP-3d). More than 80,000 structural entries, mainly from the inorganic crystal structural database, are included in MIP-3d. Density functional theory calculations are carried out for over 30,000 entries in the database, which contain the relaxed crystal structures, density of states, and band structures. The calculation of the equations of state and sound velocities is performed for over 12,000 entries. Notably, for entries with band gap values larger than 0.3 eV, the band degeneracies for the valence band maxima and the conduction band minima are analysed. The electrical transport properties for approximately 4,400 entries are also calculated and presented in MIP-3d under the constant electron-phonon coupling approximation. The calculations of the band degeneracies and electrical transport properties make MIP-3d a database specifically designed for thermoelectric applications.

scholarly journals Linking Structural and Transport Properties in Three‐Dimensional Fracture Networks

2019 ◽  
Vol 124 (2) ◽  
pp. 1185-1204 ◽  
Author(s):  
J. D. Hyman ◽  
M. Dentz ◽  
A. Hagberg ◽  
P. K. Kang
Keyword(s):  
Transport Properties ◽  
Three Dimensional ◽  
Fracture Networks

scholarly journals Lagrangian structure of flows in the Chesapeake Bay: challenges and perspectives on the analysis of estuarine flows

2010 ◽  
Vol 17 (2) ◽  
pp. 149-168 ◽  
Author(s):  
M. Branicki ◽  
R. Malek-Madani
Keyword(s):  
Shallow Water ◽  
Transport Properties ◽  
Chesapeake Bay ◽  
Three Dimensional ◽  
Water Model ◽  
Stable And Unstable Manifolds ◽  
Finite Time Lyapunov Exponent ◽  
Potential Benefits ◽  
Shallow Water Models ◽  
Hyperbolic Trajectories

Abstract. In this work we discuss applications of Lagrangian techniques to study transport properties of flows generated by shallow water models of estuarine flows. We focus on the flow in the Chesapeake Bay generated by Quoddy (see Lynch and Werner, 1991), a finite-element (shallow water) model adopted to the bay by Gross et al. (2001). The main goal of this analysis is to outline the potential benefits of using Lagrangian tools for both understanding transport properties of such flows, and for validating the model output and identifying model deficiencies. We argue that the currently available 2-D Lagrangian tools, including the stable and unstable manifolds of hyperbolic trajectories and techniques exploiting 2-D finite-time Lyapunov exponent fields, are of limited use in the case of partially mixed estuarine flows. A further development and efficient implementation of three-dimensional Lagrangian techniques, as well as improvements in the shallow-water modelling of 3-D velocity fields, are required for reliable transport analysis in such flows. Some aspects of the 3-D trajectory structure in the Chesapeake Bay, based on the Quoddy output, are also discussed.

scholarly journals Thermoelectric Relations in the Conformal Limit in Dirac and Weyl Semimetals

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 814
Author(s):  
Vicente Arjona ◽  
Juan Borge ◽  
María A. H. Vozmediano
Keyword(s):  
Chemical Potential ◽  
Transport Coefficients ◽  
Three Dimensional ◽  
Anomalous Behavior ◽  
Conformal Anomaly ◽  
Electronic Systems ◽  
Electric Transport ◽  
Thermo Electric ◽  
Weyl Semimetals ◽  
Band Crossing

Dirac and Weyl semimetals are three-dimensional electronic systems with the Fermi level at or near a band crossing. Their low energy quasi-particles are described by a relativistic Dirac Hamiltonian with zero effective mass, challenging the standard Fermi liquid (FL) description of metals. In FL systems, electrical and thermo–electric transport coefficient are linked by very robust relations. The Mott relation links the thermoelectric and conductivity transport coefficients. In a previous publication, the thermoelectric coefficient was found to have an anomalous behavior originating in the quantum breakdown of the conformal anomaly by electromagnetic interactions. We analyze the fate of the Mott relation in the system. We compute the Hall conductivity of a Dirac metal as a function of the temperature and chemical potential and show that the Mott relation is not fulfilled in the conformal limit.

Cementitious Sealing Material: 3D Digital Image Based Characterization of Pore Size Distribution and Modeling of Transport Properties

2013 ◽  
Author(s):  
Neven Ukrainczyk ◽  
Eduardus A. B. Koenders ◽  
Klaas van Breugel
Keyword(s):  
Pore Size ◽  
Transport Properties ◽  
Digital Image ◽  
Oil And Gas ◽  
Transport Model ◽  
Medial Axis ◽  
Three Dimensional ◽  
Cementitious Materials ◽  
Pore Size Distributions

Exhausted oil and gas reservoirs are one of the most potential storage facilities to sequestrate the worlds CO2. These reservoirs are sealed with cementitious materials, that should have a long time performance. Therefore, this paper emphasizes the characterization of the evolving capillary pore network and transport properties of the cementitious microstructure used to seal the wellbore. The Hymostruc numerical model is employed to simulate the development of an evolving virtual microstructure of cementitious materials. The simulated 3D microstructures were then digitized to form a matrix of cubic voxels. The pore-size distributions of the obtained virtual microstructures were calculated using a combination of three-dimensional digital image processing algorithms: 1) distance transform and 2) medial axis thinning algorithm to obtain a 3D skeleton of the pore structure. Transport properties of the simulated microstructures are analyzed employing a finite difference 3D transport model. The modeling results are compared with available literature results.

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