scholarly journals Spin-valley coherent phases of the ν=0 quantum Hall state in bilayer graphene

2017 ◽  
Vol 96 (24) ◽  
Author(s):  
Ganpathy Murthy ◽  
Efrat Shimshoni ◽  
H. A. Fertig
Keyword(s):  
Quantum Hall ◽  
Bilayer Graphene ◽  
Quantum Hall State

scholarly journals Chemical potential and quantum Hall ferromagnetism in bilayer graphene

Science ◽  
2014 ◽  
Vol 345 (6192) ◽  
pp. 58-61 ◽  
Author(s):  
Kayoung Lee ◽  
Babak Fallahazad ◽  
Jiamin Xue ◽  
David C. Dillen ◽  
Kyounghwan Kim ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Chemical Potential ◽  
Hexagonal Boron Nitride ◽  
Quantum Hall ◽  
Bilayer Graphene ◽  
Zero Magnetic Field ◽  
High Magnetic Fields ◽  
Complex Interplay ◽  
Electron Hole ◽  
Quantum Hall State

Bilayer graphene has a distinctive electronic structure influenced by a complex interplay between various degrees of freedom. We probed its chemical potential using double bilayer graphene heterostructures, separated by a hexagonal boron nitride dielectric. The chemical potential has a nonlinear carrier density dependence and bears signatures of electron-electron interactions. The data allowed a direct measurement of the electric field–induced bandgap at zero magnetic field, the orbital Landau level (LL) energies, and the broken-symmetry quantum Hall state gaps at high magnetic fields. We observe spin-to-valley polarized transitions for all half-filled LLs, as well as emerging phases at filling factors ν = 0 and ν = ±2. Furthermore, the data reveal interaction-driven negative compressibility and electron-hole asymmetry in N = 0, 1 LLs.

scholarly journals Explanation of ν = −½ fractional quantum Hall state in bilayer graphene

2016 ◽  
Vol 472 (2186) ◽  
pp. 20150330 ◽  
Author(s):  
J. Jacak ◽  
L. Jacak
Keyword(s):  
Experimental Data ◽  
Quantum Hall Effect ◽  
Quantum Hall ◽  
Bilayer Graphene ◽  
Fractional Quantum Hall Effect ◽  
Landau Levels ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Quantum Hall State ◽  
Good Agreement

The commensurability condition is applied to determine the hierarchy of fractional filling of Landau levels for fractional quantum Hall effect (FQHE) in monolayer and bilayer graphene. Good agreement with experimental data is achieved. The presence of even-denominator filling fractions in the hierarchy of the FQHE in bilayer graphene is explained, including the state at ν = − 1 2 .

scholarly journals Metallic Phase and Temperature Dependence of the ν=0 Quantum Hall State in Bilayer Graphene

2019 ◽  
Vol 122 (9) ◽  
Author(s):  
Jing Li ◽  
Hailong Fu ◽  
Zhenxi Yin ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Quantum Hall ◽  
Bilayer Graphene ◽  
Metallic Phase ◽  
Quantum Hall State

Layer Polarizability and Easy-Axis Quantum Hall Ferromagnetism in Bilayer Graphene

Nano Letters ◽  
2017 ◽  
Vol 17 (6) ◽  
pp. 3416-3420 ◽  
Author(s):  
C. Pan ◽  
Y. Wu ◽  
B. Cheng ◽  
S. Che ◽  
T. Taniguchi ◽  
...  
Keyword(s):  
Easy Axis ◽  
Quantum Hall ◽  
Bilayer Graphene

scholarly journals Probing Quantum Hall State Homogeneity with Surface Waves

2013 ◽  
Vol 456 ◽  
pp. 012030 ◽  
Author(s):  
M E Msall ◽  
W Dietsche ◽  
S Schmult ◽  
K von Klitzing
Keyword(s):  
Surface Waves ◽  
Quantum Hall ◽  
Quantum Hall State

scholarly journals A Chern-Simons effective field theory for the Pfaffian quantum Hall state

1998 ◽  
Vol 516 (3) ◽  
pp. 704-718 ◽  
Author(s):  
Eduardo Fradkin ◽  
Chetan Nayak ◽  
Alexei Tsvelik ◽  
Frank Wilczek
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Quantum Hall ◽  
Effective Field ◽  
Chern Simons ◽  
Quantum Hall State

Spin and Charge Density Excitations and the Collapse of the Fractional Quantum Hall State atν=1/3

1997 ◽  
Vol 78 (21) ◽  
pp. 4095-4098 ◽  
Author(s):  
H. D. M. Davies ◽  
J. C. Harris ◽  
J. F. Ryan ◽  
A. J. Turberfield
Keyword(s):  
Charge Density ◽  
Quantum Hall ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Quantum Hall State
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