Charge transport in graphene doped with diatomic halogen molecules (I2, Br2) near Dirac point

2012 ◽  
Vol 162 (17-18) ◽  
pp. 1689-1693 ◽  
Author(s):  
Seung Wan Chu ◽  
Seung Jae Baek ◽  
Dong Chul Kim ◽  
Sunae Seo ◽  
Jun Sung Kim ◽  
...  
Keyword(s):  
Charge Transport ◽  
Dirac Point

scholarly journals Impurity charge compensation in graphene by a polarized ferroelectric polymer and its effect on charge transport near the Dirac point

AIP Advances ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 085015
Author(s):  
Kelotchi S. Figueroa ◽  
Natalya A. Zimbovskaya ◽  
Nicholas J. Pinto ◽  
Chengyu Wen ◽  
A. T. Charlie Johnson
Keyword(s):  
Charge Transport ◽  
Dirac Point ◽  
Charge Compensation ◽  
Ferroelectric Polymer

Strain-induced metal-semimetal transition of BeB2 monolayer

RSC Advances ◽  
2015 ◽  
Vol 5 (15) ◽  
pp. 11392-11396 ◽  
Author(s):  
Yuewen Mu ◽  
Feng Ding ◽  
Haigang Lu
Keyword(s):  
Charge Transport ◽  
Dirac Point ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
High Carrier

The Dirac point and cones make some two-dimensional materials (e.g., graphene, silicone and graphyne) exhibit ballistic charge transport and enormously high carrier mobilities.

Magnetic Ordering via Itinerant Ferromagnetism in a Metal-Organic Framework

2020 ◽  
Author(s):  
Jesse Park ◽  
Brianna Collins ◽  
Lucy Darago ◽  
Tomce Runcevski ◽  
Michael Aubrey ◽  
...  
Keyword(s):  
Charge Transport ◽  
Magnetic Order ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Itinerant Ferromagnetism ◽  
Organic Solids ◽  
Metal Organic ◽  
Organic Framework

<b>Materials that combine magnetic order with other desirable physical attributes offer to revolutionize our energy landscape. Indeed, such materials could find transformative applications in spintronics, quantum sensing, low-density magnets, and gas separations. As a result, efforts to design multifunctional magnetic materials have recently moved beyond traditional solid-state materials to metal–organic solids. Among these, metal–organic frameworks in particular bear structures that offer intrinsic porosity, vast chemical and structural programmability, and tunability of electronic properties. Nevertheless, magnetic order within metal–organic frameworks has generally been limited to low temperatures, owing largely to challenges in creating strong magnetic exchange in extended metal–organic solids. Here, we employ the phenomenon of itinerant ferromagnetism to realize magnetic ordering at <i>T</i><sub>C</sub> = 225 K in a mixed-valence chromium(II/III) triazolate compound, representing the highest ferromagnetic ordering temperature yet observed in a metal–organic framework. The itinerant ferromagnetism is shown to proceed via a double-exchange mechanism, the first such observation in any metal–organic material. Critically, this mechanism results in variable-temperature conductivity with barrierless charge transport below <i>T</i><sub>C</sub> and a large negative magnetoresistance of 23% at 5 K. These observations suggest applications for double-exchange-based coordination solids in the emergent fields of magnetoelectrics and spintronics. Taken together, the insights gleaned from these results are expected to provide a blueprint for the design and synthesis of porous materials with synergistic high-temperature magnetic and charge transport properties. </b>

Design and Synthesis of Two-Dimensional Covalent Organic Frameworks with Four-Arm Cores: Prediction of Remarkable Ambipolar Charge-Transport Properties

2019 ◽  
Author(s):  
Simil Thomas ◽  
Hong Li ◽  
Raghunath R. Dasari ◽  
Austin Evans ◽  
William Dichtel ◽  
...  
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Density Functional ◽  
Polymer Networks ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
X Ray Diffraction ◽  
Zinc Porphyrin ◽  
Design And Synthesis ◽  
Predicted Values

<p>We have considered three two-dimensional (2D) π-conjugated polymer networks (i.e., covalent organic frameworks, COFs) materials based on pyrene, porphyrin, and zinc-porphyrin cores connected <i>via</i> diacetylenic linkers. Their electronic structures, investigated at the density functional theory global-hybrid level, are indicative of valence and conduction bands that have large widths, ranging between 1 and 2 eV. Using a molecular approach to derive the electronic couplings between adjacent core units and the electron-vibration couplings, the three π-conjugated 2D COFs are predicted to have ambipolar charge-transport characteristics with electron and hole mobilities in the range of 65-95 cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup>. Such predicted values rank these 2D COFs among the highest-mobility organic semiconductors. In addition, we have synthesized the zinc-porphyrin based 2D COF and carried out structural characterization via powder X-ray diffraction and surface area analysis, which demonstrates the feasability of these electroactive networks.</p>

Meso-Scale Modelling of Charge Transport in Halide Perovskites

2018 ◽  
Author(s):  
Matthew Wolf ◽  
Lewis Irvine ◽  
Ian Thompson ◽  
Alison Walker
Keyword(s):  
Charge Transport ◽  
Scale Modelling ◽  
Halide Perovskites ◽  
Meso Scale

Band Occupation and Charge Transport in CdSe Nanocrystal Superlattices

2018 ◽  
Author(s):  
Maryam Alimoradi Jazi ◽  
Wiel Evers ◽  
Thomas Altantzis ◽  
Christophe Delerue ◽  
Sara Bals ◽  
...  
Keyword(s):  
Charge Transport ◽  
Nanocrystal Superlattices
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