Strain-engineering the in-plane electrical anisotropy of GeSe monolayers

2020 ◽  
Vol 22 (2) ◽  
pp. 914-918 ◽  
Author(s):  
Zongbao Li ◽  
Xinsheng Liu ◽  
Xia Wang ◽  
Yusi Yang ◽  
Shun-Chang Liu ◽  
...  
Keyword(s):  
Effective Mass ◽  
Strain Engineering ◽  
Charge Carriers ◽  
Electrical Anisotropy ◽  
Mobility Of Charge Carriers

The anisotropic ratio of the effective mass and mobility of charge carriers of GeSe monolayer along two principle axes can be controlled by using simple strain conditions.

scholarly journals Large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yangkun He ◽  
Jacob Gayles ◽  
Mengyu Yao ◽  
Toni Helm ◽  
Tommy Reimann ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Effective Mass ◽  
Fermi Energy ◽  
High Mobility ◽  
Ferromagnetic Materials ◽  
Charge Carriers ◽  
Fermi Velocity ◽  
High Curie Temperature ◽  
Pulsed Field ◽  
Mobility Of Charge Carriers

AbstractA large non-saturating magnetoresistance has been observed in several nonmagnetic topological Weyl semi-metals with high mobility of charge carriers at the Fermi energy. However, ferromagnetic systems rarely display a large magnetoresistance because of localized electrons in heavy d bands with a low Fermi velocity. Here, we report a large linear non-saturating magnetoresistance and high mobility in ferromagnetic MnBi. MnBi, unlike conventional ferromagnets, exhibits a large linear non-saturating magnetoresistance of 5000% under a pulsed field of 70 T. The electrons and holes’ mobilities are both 5000 cm2V−1s−1 at 2 K, which are one of the highest for ferromagnetic materials. These phenomena are due to the spin-polarised Bi 6p band’s sharp dispersion with a small effective mass. Our study provides an approach to achieve high mobility in ferromagnetic systems with a high Curie temperature, which is advantageous for topological spintronics.

A Comprehensive Insight Towards Pharmaceutical Aspects of Graphene Nanosheets

2020 ◽  
Vol 21 (11) ◽  
pp. 1016-1027 ◽  
Author(s):  
Fatemeh Emadi ◽  
Arash Emadi ◽  
Ahmad Gholami
Keyword(s):  
Targeted Delivery ◽  
Graphene Nanosheets ◽  
High Surface ◽  
High Surface Area ◽  
Charge Carriers ◽  
Pharmaceutical Sciences ◽  
Pharmacokinetics And Pharmacodynamics ◽  
Mobility Of Charge Carriers ◽  
Graphene Derivatives ◽  
Pharmacokinetic Properties

Graphene Derivatives (GDs) have captured the interest and imagination of pharmaceutical scientists. This review exclusively provides pharmacokinetics and pharmacodynamics information with a particular focus on biopharmaceuticals. GDs can be used as multipurpose pharmaceutical delivery systems due to their ultra-high surface area, flexibility, and fast mobility of charge carriers. Improved effects, targeted delivery to tissues, controlled release profiles, visualization of biodistribution and clearance, and overcoming drug resistance are examples of the benefits of GDs. This review focuses on the application of GDs for the delivery of biopharmaceuticals. Also, the pharmacokinetic properties and the advantage of using GDs in pharmaceutics will be reviewed to achieve a comprehensive understanding about the GDs in pharmaceutical sciences.

Frequency dependent mobility of charge carriers along polymer chains with finite length

2005 ◽  
Vol 243 (2) ◽  
pp. 382-386 ◽  
Author(s):  
P. Prins ◽  
F. C. Grozema ◽  
J. M. Schins ◽  
L. D. A. Siebbeles
Keyword(s):  
Finite Length ◽  
Charge Carriers ◽  
Polymer Chains ◽  
Frequency Dependent ◽  
Mobility Of Charge Carriers

scholarly journals Термоэлектрические свойства твердых растворов (CuInSe-=SUB=-2-=/SUB=-)-=SUB=-1-x-=/SUB=-(In-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=-)-=SUB=-x-=/SUB=-

2022 ◽  
Vol 56 (1) ◽  
pp. 38
Author(s):  
Ч.И. Абилов ◽  
М.Ш. Гасанова ◽  
Н.Т. Гусейнова ◽  
Э.К. Касумова
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Solid Solutions ◽  
Figure Of Merit ◽  
Charge Carriers ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Mobility Of Charge Carriers ◽  
Temperature Dependences ◽  
Thermoelectric Coefficient

The results of studying the temperature dependences of electrical conductivity, thermoelectric coefficient, Hall mobility of charge carriers, total and electronic thermal conductivity, as well as phonon thermal resistance of alloys of (CuInSe2)1-x(In2Te3)x solid solutions at x=0.005 and 0.0075 are presented. The values ​​of these parameters for certain temperatures were used to calculate the values ​​of the thermoelectric figure of merit of the indicated compositions. It turned out that as the temperature rises, the thermoelectric figure of merit tends to grow strongly, from which it can be concluded that these materials can be used in the manufacture of thermoelements.

Properties of Bi and BiSb Nano-Dimensional Layers in Thz Frequency Range

2020 ◽  
Vol 312 ◽  
pp. 206-212
Author(s):  
Ivan L. Tkhorzhevskiy ◽  
Anton D. Zaitsev ◽  
Petr S. Demchenko ◽  
Dmitry V. Zykov ◽  
Aleksei V. Asach ◽  
...  
Keyword(s):  
Phase Shift ◽  
Time Domain ◽  
Terahertz Wave ◽  
Film Structure ◽  
Charge Carriers ◽  
Frequency Range ◽  
Terahertz Time Domain Spectroscopy ◽  
Antimony Content ◽  
Mobility Of Charge Carriers ◽  
Substrate Film

In the present paper we demonstrate and compare different properties of Bi and Bi1-xSbx thin films placed on polyimide (PI) substrate in frequency range from 0.2 to 1.0 THz. Bi films with a thickness of 40, 105 and 150 nm have been studied as well as 150 nm Bi1-xSbx solid solutions with Sb concentration of 5, 8, 12 and 15 %. An effective refractive index and permittivity of whole substrate/film structures have been derived by using terahertz time-domain spectroscopy (THz-TDS) method. These measurements have shown the positive phase shift in PI substrate with a thickness of 42 μm and revealed that it is barely transparent in studied frequency range, but the whole substrate/film structure provides the negative phase shift of terahertz wave. It was shown that the permittivity depends on mobility of charge carriers which is driven by film thickness and antimony content.

Identification of frequency regimes for short and long range mobility of charge carriers in GO/MnFe2O4/PPy nanocomposites

2020 ◽  
Vol 263 ◽  
pp. 116336 ◽  
Author(s):  
Amna Riaz ◽  
Qurat ul Ain ◽  
Farah Kanwal ◽  
Saira Ishaq ◽  
Ali Raza Khan ◽  
...  
Keyword(s):  
Long Range ◽  
Charge Carriers ◽  
Mobility Of Charge Carriers

scholarly journals Mobility of charge carriers in self-assembled monolayers

2019 ◽  
Vol 10 ◽  
pp. 2449-2458
Author(s):  
Zhihua Fu ◽  
Tatjana Ladnorg ◽  
Hartmut Gliemann ◽  
Alexander Welle ◽  
Asif Bashir ◽  
...  
Keyword(s):  
Charge Transport ◽  
Charge Carrier Mobility ◽  
Charge Carriers ◽  
Self Assembled Monolayers ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mobility Of Charge Carriers ◽  
Assembled Monolayers ◽  
Self Assembled

We present a new approach to study charge transport within 2D layers of organic semi-conductors (OSCs) using atomic force microscopy (AFM)-based lithography applied to self-assembled monolayers (SAMs), fabricated from appropriate organothiols. The extent of lateral charge transport was investigated by insulating pre-defined patches within OSC-based SAMs with regions of insulating SAM made from large band gap alkanethiolates. The new method is demonstrated using a phenyl-linked anthracenethiolate (PAT), 4-(anthracene-2-ylethynyl)benzyl thiolate. I–V characteristics of differently shaped PAT-islands were measured using the AFM tip as a top electrode. We were able to determine a relationship between island size and electrical conductivity, and from this dependence, we could obtain information on the lateral charge transport and charge carrier mobility within the thin OSC layers. Our study demonstrates that AFM nanografting of appropriately functionalized OSC molecules provides a suitable method to determine intrinsic mobilities of charge carriers in OSC thin films. In particular, this method is rather insensitive with regard to influence of grain boundaries and other defects, which hamper the application of conventional methods for the determination of mobilities in macroscopic samples.

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