scholarly journals Anomalous behavior of 1/f noise in graphene near the charge neutrality point

2016 ◽  
Vol 108 (10) ◽  
pp. 103106 ◽  
Author(s):  
Shunpei Takeshita ◽  
Sadashige Matsuo ◽  
Takahiro Tanaka ◽  
Shu Nakaharai ◽  
Kazuhito Tsukagoshi ◽  
...  
Keyword(s):  
Anomalous Behavior ◽  
Charge Neutrality ◽  
Neutrality Point

scholarly journals Spin transport in multilayer graphene away from the charge neutrality point

Carbon ◽  
2021 ◽  
Vol 172 ◽  
pp. 474-479
Author(s):  
Xin He ◽  
Yan Wen ◽  
Chenhui Zhang ◽  
Peng Li ◽  
Dongxing Zheng ◽  
...  
Keyword(s):  
Spin Transport ◽  
Multilayer Graphene ◽  
Charge Neutrality ◽  
Neutrality Point

scholarly journals Unconventional Hall effect near charge neutrality point in a two-dimensional electron-hole system

2012 ◽  
Vol 86 (15) ◽  
Author(s):  
O. E. Raichev ◽  
G. M. Gusev ◽  
E. B. Olshanetsky ◽  
Z. D. Kvon ◽  
N. N. Mikhailov ◽  
...  
Keyword(s):  
Hall Effect ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Hole ◽  
Charge Neutrality ◽  
Neutrality Point

Molecular Doping the Topological Dirac Semimetal Na3Bi across the Charge Neutrality Point with F4-TCNQ

2016 ◽  
Vol 8 (25) ◽  
pp. 16412-16418 ◽  
Author(s):  
Mark T. Edmonds ◽  
Jack Hellerstedt ◽  
Kane M. O’Donnell ◽  
Anton Tadich ◽  
Michael S. Fuhrer
Keyword(s):  
Charge Neutrality ◽  
Dirac Semimetal ◽  
Molecular Doping ◽  
Neutrality Point

scholarly journals Nonlocal Transport Near Charge Neutrality Point in a Two-Dimensional Electron-Hole System

2012 ◽  
Vol 108 (22) ◽  
Author(s):  
G. M. Gusev ◽  
E. B. Olshanetsky ◽  
Z. D. Kvon ◽  
A. D. Levin ◽  
N. N. Mikhailov ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Hole ◽  
Charge Neutrality ◽  
Nonlocal Transport ◽  
Neutrality Point

scholarly journals Graphene Nanoribbon Conductance Model in Parabolic Band Structure

2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
Mohammad Taghi Ahmadi ◽  
Zaharah Johari ◽  
N. Aziziah Amin ◽  
Amir Hossein Fallahpour ◽  
Razali Ismail
Keyword(s):  
Band Structure ◽  
Quantum Confinement Effect ◽  
Structure Study ◽  
Graphene Nanoribbon ◽  
Published Data ◽  
Temperature Dependent ◽  
Charge Neutrality ◽  
Base Method ◽  
Long Channel ◽  
Neutrality Point

Many experimental measurements have been done on GNR conductance. In this paper, analytical model of GNR conductance is presented. Moreover, comparison with published data which illustrates good agreement between them is studied. Conductance of GNR as a one-dimensional device channel with parabolic band structures near the charge neutrality point is improved. Based on quantum confinement effect, the conductance of GNR in parabolic part of the band structure, also the temperature-dependent conductance which displays minimum conductance near the charge neutrality point are calculated. Graphene nanoribbon (GNR) with parabolic band structure near the minimum band energy terminates Fermi-Dirac integral base method on band structure study. While band structure is parabola, semiconducting GNRs conductance is a function of Fermi-Dirac integral which is based on Maxwell approximation in nondegenerate limit especially for a long channel.

scholarly journals Enhancement of the thermoelectric properties in bilayer graphene structures induced by Fano resonances

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. A. Briones-Torres ◽  
R. Pérez-Álvarez ◽  
S. Molina-Valdovinos ◽  
I. Rodríguez-Vargas
Keyword(s):  
Thermoelectric Properties ◽  
Thermal Transport ◽  
Figure Of Merit ◽  
Temperature Response ◽  
Bilayer Graphene ◽  
Fano Resonances ◽  
Thermoelectric Devices ◽  
Charge Neutrality ◽  
Special Profile ◽  
Neutrality Point

AbstractFano resonances of bilayer graphene could be attractive for thermoelectric devices. The special profile presented by such resonances could significantly enhance the thermoelectric properties. In this work, we study the thermoelectric properties of bilayer graphene single and double barrier structures. The barrier structures are typically supported by a substrate and encapsulated by protecting layers, reducing considerably the phonon thermal transport. So, we will focus on the electronic contribution to the thermal transport. The charge carriers are described as massive chiral particles through an effective Dirac-like Hamiltonian. The Hybrid matrix method and the Landauer–Büttiker formalism are implemented to obtain the transmission, transport and thermoelectric properties. The temperature dependence of the Seebeck coefficient, the power factor, the figure of merit and the efficiency is analyzed for gapless single and double barriers. We find that the charge neutrality point and the system resonances shape the thermoelectric response. In the case of single barriers, the low-temperature thermoelectric response is dominated by the charge neutrality point, while the high-temperature response is determined by the Fano resonances. In the case of double barriers, Breit–Wigner resonances dominate the thermoelectric properties at low temperatures, while Fano and hybrid resonances become preponderant as the temperature rises. The values for the figure of merit are close to two for single barriers and above three for double barriers. The system resonances also allows us to optimize the output power and the efficiency at low and high temperatures. By computing the density of states, we also corroborate that the improvement of the thermoelectric properties is related to the accumulation of electron states. Our findings indicate that bilayer graphene barrier structures can be used to improve the response of thermoelectric devices.

scholarly journals Cyclotron Resonance near the Charge Neutrality Point of Graphene

2011 ◽  
Author(s):  
Zhigang Jiang ◽  
E. A. Henriksen ◽  
P. Cadden-Zimansky ◽  
L.-C. Tung ◽  
Y.-J. Wang ◽  
...  
Keyword(s):  
Cyclotron Resonance ◽  
Charge Neutrality ◽  
Neutrality Point
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