Quantum Spin Hall Effect - Spin orbit induced energy gap in graphene ⇒A new 2D electronic phase - Gapless Edge states and transport - Time Reversal symmetry and Z 2 topological stability. Quantum Hall effect in graphene for resistance metrology The quantum Hall effect (QHE) observed in two dimensional electron gas at low temperature and under a strong perpendicular magnetic field has … Although, the conclusive evidence for collective behaviour of electrons in graphene is lacking so far, recently scientists have observed the fractional quantum Hall effect (FQHE) in graphene experimentally. III. The QHE is exclusive to two-dimensional (2D) metals and has elucidated many important aspects of quantum … Owing to the fact that graphene is just one atom thick, it has been suggested that it might be possible to control its properties by subjecting it to mechanical strain. Scientific Reports 2016 , 6 (1) DOI: 10.1038/srep38393. quantum Hall effect or anomalous quantum Hall effect] which remains visible up to room temperature. Three Dimensional Generalization - Topological Insulator, Surface States In chapter 5, we briefly discuss several multicomponent quantum Hall systems, namely the quantum Hall ferromagnetism, bilayer systems and graphene that may be viewed as a four-component system. … effect in graphene resembles the charge quantum Hall effect, and we will show that spin and charge currents can be transported in gapless edge states. The quantum Hall effect (QHE), one example of a quantum phenomenon that occurs on a truly macroscopic scale, has been attracting intense interest since its discovery in 1980 (1). Graphene shows the quantum Hall effect with respect to conductivity quantization: the effect is anomalous in that the sequence of steps is shifted by 1/2 with respect to the standard sequence and with an additional factor of 4. Graphene, … As a model system, graphene thus identifies a new class of spin Hall insulator. Wenye Duan, Wei Wang, Chao Zhang, Kuijuan Jin, Zhongshui Ma. Graphene samples whose lateral size ∼10 μm were fabricated into mesoscopic … Quantum Hall effect in epitaxial graphene with permanent magnets. The quantum Hall effect, usually seen near 0 degrees kelvin, occurs at room temperature within single graphene sheets, in which the charge carriers behave as massive relativistic particles. Graphene, the Quantum Spin Hall Effect and topological insulators I. Graphene II. The quantum Hall effect, which is characterized by an insulating bulk and chiral edge states, has recently been generalized from transport of charges to transport of other degrees of freedom, leading to quantum spin Hall and quantum valley Hall effects. Room-Temperature Quantum Hall Effect in Graphene ... he quantum Hall effect (QHE), one ex-ample of a quantum phenomenon that occurs on a truly macroscopic scale, has been attracting intense interest since its dis-covery in 1980 (1). The quantum Hall (QH) effect in two-dimensional electron and hole gas is studied in high quality graphene samples. The Quantum Hall Effect in graphene Seminar: Electronic properties of graphene SS 2009 Matthias Bädicker 1. Chapter 3 is devoted to the transport characteristics of the integer quantum Hall effect, and the basic aspects of the fractional quantum Hall effect are described in chapter 4. When electrons are confined in two-dimensional materials, quantum-mechanically enhanced transport phenomena such as the quantum Hall effect can be observed.