Fermi Surface Shape Controlling by Element Substitution in Tl-Based Cuprates

2014 ◽  
Author(s):  
S. Miyao ◽  
H. Sakakibara ◽  
I. Maruyama ◽  
K. Kuroki ◽  
K. Kusakabe
Keyword(s):  
Fermi Surface ◽  
Surface Shape ◽  
Element Substitution ◽  
Shape Controlling

Electrostatic energy and screened charge interaction near the surface of metals with different Fermi surface shape

1980 ◽  
Vol 94 (1) ◽  
pp. 179-203 ◽  
Author(s):  
A.M. Gabovich ◽  
L.G. Il'chenko ◽  
E.A. Pashitskii ◽  
Yu.A. Romanov
Keyword(s):  
Fermi Surface ◽  
Surface Shape ◽  
Electrostatic Energy ◽  
Charge Interaction

Electrostatic energy and screened charge interaction near the surface of metals with different fermi surface shape

1980 ◽  
Vol 94 (1) ◽  
pp. A133-A134
Author(s):  
A.M. Gabovich ◽  
L.G. Il'chenko ◽  
E.A. Pashitskii ◽  
Yu.A. Romanov
Keyword(s):  
Fermi Surface ◽  
Surface Shape ◽  
Electrostatic Energy ◽  
Charge Interaction

Ordinary Hall anomaly due to the Fermi surface shape in MnAs

2021 ◽  
Vol 104 (19) ◽  
Author(s):  
C. Helman ◽  
A. M. Llois ◽  
M. Tortarolo
Keyword(s):  
Fermi Surface ◽  
Surface Shape

Fermi surface shape and angle-dependent magnetoresistance oscillations

2001 ◽  
Vol 13 (10) ◽  
pp. 2271-2279 ◽  
Author(s):  
M S Nam ◽  
S J Blundell ◽  
A Ardavan ◽  
J A Symington ◽  
J Singleton
Keyword(s):  
Fermi Surface ◽  
Surface Shape ◽  
Magnetoresistance Oscillations

scholarly journals Impact of Fermi Surface Shape Engineering on Calculated Electronic Transport Properties of Bi-Sb-Te

2021 ◽  
Vol 59 (1) ◽  
pp. 54-60
Author(s):  
Sang-il Kim ◽  
Jong-Chan Lim ◽  
Heesun Yang ◽  
Hyun-Sik Kim
Keyword(s):  
Electrical Conductivity ◽  
Fermi Surface ◽  
Seebeck Coefficient ◽  
Transport Properties ◽  
Effective Mass ◽  
Power Factor ◽  
Electronic Transport ◽  
Surface Shape ◽  
Thermoelectric Performance ◽  
Electronic Transport Properties

Using thermoelectric refrigerators can address climate change because they do not utilize harmful greenhouse gases as refrigerants. To compete with current vapor compression cycle refrigerators, the thermoelectric performance of materials needs to be improved. However, improving thermoelectric performance is challenging because of the trade-off relationship between the Seebeck coefficient and electrical conductivity. Here, we demonstrate that decreasing conductivity effective mass by engineering the shape of the Fermi surface pocket (non-parabolicity factor) can decouple electrical conductivity from the Seebeck coefficient. The effect of engineering the non-parabolicity factor was shown by calculating the electronic transport properties of a state-of-the-art Bi-Sb-Te ingot via two-band model with varying non-parabolicity. The power factor (the product of the Seebeck coefficient squared and electrical conductivity) was calculated to be improved because of enhanced electrical conductivity, with an approximately constant Seebeck coefficient, using a non-parabolicity factor other than unity. Engineering the non-parabolicity factor to achieve lighter conductivity effective mass can improve the electronic transport properties of thermoelectric materials because it only improves electrical conductivity without decreasing the Seebeck coefficient (which is directly proportional to the band mass of a single Fermi surface pocket and not to the conductivity effective mass). Theoretically, it is demonstrated that a thermoelectric figure-of-merit <i>zT</i> higher than 1.3 can be achieved with a Bi-Sb-Te ingot if the non-parabolicity factor is engineered to be 0.2. Engineering the non-parabolicity factor is another effective band engineering approach, similar to band convergence, to achieve an effective improvement in power factor.

scholarly journals Quasiparticle mass enhancement and Fermi surface shape modification in oxide two-dimensional electron gases

2016 ◽  
Vol 93 (4) ◽  
Author(s):  
John R. Tolsma ◽  
Alessandro Principi ◽  
Reza Asgari ◽  
Marco Polini ◽  
Allan H. MacDonald
Keyword(s):  
Fermi Surface ◽  
Surface Shape ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Shape Modification ◽  
Electron Gases ◽  
Mass Enhancement

Angular magnetoresistance oscillations and the shape of the Fermi surface in ?(ET)2IBr2

1992 ◽  
Vol 2 (1) ◽  
pp. 89-99 ◽  
Author(s):  
M. V. Kartsovnik ◽  
V. N. Laukhin ◽  
S. I. Pesotskii ◽  
I. F. Schegolev ◽  
V. M. Yakovenko
Keyword(s):  
Fermi Surface ◽  
Magnetoresistance Oscillations

Fermi-surface reconstruction close to a pressure-induced metal-insulator transition

2004 ◽  
Vol 114 ◽  
pp. 277-281 ◽  
Author(s):  
J. Wosnitza ◽  
J. Hagel ◽  
O. Stockert ◽  
C. Pfleiderer ◽  
J. A. Schlueter ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Surface Reconstruction ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Fermi Surface Reconstruction
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