scholarly journals Tunneling in Fermi Systems with Quadratic Band Crossing Points

2020 ◽  
Author(s):  
Ipsita Mandal
Keyword(s):  
Band Structure ◽  
Transport Properties ◽  
Transmission Coefficient ◽  
Potential Barrier ◽  
Fano Factor ◽  
Fermi Systems ◽  
Finite Height ◽  
Normal Metals ◽  
Band Crossing ◽  
Crossing Point

We investigate the tunneling of quasiparticles through a potential barrier of finite height and width, in a system with a band structure consisting of a quadratic band crossing point (QBCP). We compute the results of the transmission coefficient at various incident angles, and also the conductivity and the Fano factor. We discuss the distinguishing signatures of these transport properties in comparison with other semimetals, as well as electrons in normal metals.

scholarly journals Effect of Deformation on Topological Properties of Cobalt Monosilicide

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 143
Author(s):  
Sergey Nikolaev ◽  
Dmitry Pshenay-Severin ◽  
Yuri Ivanov ◽  
Alexander Burkov
Keyword(s):  
Band Structure ◽  
Ab Initio Calculations ◽  
Topological Charge ◽  
External Stress ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Topological Properties ◽  
Uniaxial Deformation ◽  
Band Crossing ◽  
Topological Charges

Recently, it was shown that materials with certain crystal structures can exhibit multifold band crossings with large topological charges. CoSi is one such material that belongs to non-centrosymmetric space group P213 (#198) and posseses multifold band crossing points with a topological charge of 4. The change of crystal symmetry, e.g., by means of external stress, can lift the degeneracy and change its topological properties. In the present work, the influence of uniaxial deformation on the band structure and topological properties of CoSi is investigated on the base of ab initio calculations. The k·p Hamiltonian taking into account deformation is constructed on the base of symmetry consideration near the Γ and R points both with and without spin-orbit coupling. The transformation of multifold band crossings into nodes of other types with different topological charges, their shift both in energy and in reciprocal space and the tilt of dispersion around nodes are studied in detail depending on the direction of uniaxial deformation.

Effect of Electron-Phonon Coupling on Transport Properties of Monolayers of ZrS2, BiI3 and PbI2: A thermoelectric Perspective

2021 ◽  
Author(s):  
Gautam Sharma ◽  
Vineet Kumar Pandey ◽  
Shouvik Datta ◽  
Prasenjit Ghosh
Keyword(s):  
Relaxation Time ◽  
Band Structure ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Waste Heat ◽  
Transport Coefficients ◽  
Electrical Energy ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Thermoelectric materials are used for conversion of waste heat to electrical energy. The transport coefficients that determine their thermoelectric properties depend on the band structure and the relaxation time of...

scholarly journals Electronic Band Structure and Transport Properties of the Cluster Compound Ag3Tl2Mo15Se19

2019 ◽  
Vol 58 (9) ◽  
pp. 5533-5542 ◽  
Author(s):  
Patrick Gougeon ◽  
Philippe Gall ◽  
Rabih Al Rahal Al Orabi ◽  
Benoit Boucher ◽  
Bruno Fontaine ◽  
...  
Keyword(s):  
Band Structure ◽  
Transport Properties ◽  
Electronic Band Structure ◽  
Cluster Compound ◽  
Electronic Band

Band structure effects of transport properties in icosahedral quasicrystals

1993 ◽  
Vol 71 (25) ◽  
pp. 4166-4169 ◽  
Author(s):  
Takeo Fujiwara ◽  
Susumu Yamamoto ◽  
Guy Trambly de Laissardière
Keyword(s):  
Band Structure ◽  
Transport Properties ◽  
Icosahedral Quasicrystals

Band Structure and High-Field Transport Properties of InP

1970 ◽  
Vol 1 (10) ◽  
pp. 3998-4004 ◽  
Author(s):  
L. W. James ◽  
J. P. Van Dyke ◽  
F. Herman ◽  
D. M. Chang
Keyword(s):  
Band Structure ◽  
Transport Properties ◽  
High Field

scholarly journals Analyzing transport properties of p-type Mg2Si–Mg2Sn solid solutions: optimization of thermoelectric performance and insight into the electronic band structure

2019 ◽  
Vol 7 (3) ◽  
pp. 1045-1054 ◽  
Author(s):  
Hasbuna Kamila ◽  
Prashant Sahu ◽  
Aryan Sankhla ◽  
Mohammad Yasseri ◽  
Hoang-Ngan Pham ◽  
...  
Keyword(s):  
Band Structure ◽  
Transport Properties ◽  
Carrier Concentration ◽  
Solid Solutions ◽  
Figure Of Merit ◽  
Electronic Band Structure ◽  
Thermoelectric Performance ◽  
Electronic Band ◽  
P Type ◽  
Insight Into

Figure of merit zT mapping of p-Mg2Si1−xSnx with respect to carrier concentration.

scholarly journals Electronic stripes and transport properties in borophene heterostructures

Nanoscale ◽  
2019 ◽  
Vol 11 (38) ◽  
pp. 17894-17903 ◽  
Author(s):  
G. H. Silvestre ◽  
Wanderlã L. Scopel ◽  
R. H. Miwa
Keyword(s):  
Band Structure ◽  
Fermi Level ◽  
Transport Properties ◽  
Electronic Band Structure ◽  
Electronic States ◽  
Electronic Band

(Left) Localization of the electronic states near the Fermi level, and the electronic band structure projected on the S1 and S2 stripes. (Right) Transmission probabilites parallel (y) and perpendicular (x) to the S1/S2 borophene superlattice.

EFFECTIVE MOBILITY MODEL OF GRAPHENE NANORIBBON IN PARABOLIC BAND ENERGY

2011 ◽  
Vol 25 (10) ◽  
pp. 739-745 ◽  
Author(s):  
N. A. AMIN ◽  
M. T. AHMADI ◽  
Z. JOHARI ◽  
S. M. MOUSAVI ◽  
R. ISMAIL
Keyword(s):  
Experimental Data ◽  
Band Structure ◽  
Transport Properties ◽  
Conventional Method ◽  
Dirac Point ◽  
Graphene Nanoribbons ◽  
Mobility Model ◽  
Band Energy ◽  
One Dimensional ◽  
Effective Mobility

In this letter, we investigate the transport properties of one-dimensional semiconducting Graphene nanoribbons (GNRs) with parabolic band structure near the Dirac point. The analytical model of effective mobility is developed by using the conductance approach, which differs from the conventional method of extracting the effective mobility using the well-known Matthiessen rule. Graphene nanoribbons conductance model developed was applied in the Drude model to obtain the effective mobility, which then gives nearly close comparison with the experimental data.

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