Spectroscopic studies of electronic phenomena in graphene are reviewed. A variety of
methods and techniques are surveyed, from quasiparticle spectroscopies (tunneling …

Plasmons in graphene have unusual properties and offer promising prospects for plasmonic
applications covering a wide frequency range, ranging from terahertz up to the visible …

The low-energy effective theory of the edge excitations in the fractional quantum Hall (FQH)
states is derived. The edge excitations are shown to form a new kind of state which is called …

Using the gauge invariances, I show that the (fractional and integral) quantum Hall states
and the chiral spin states must have gapless boundary excitations. The dynamical properties …

The electrodynamical properties of the edge excitations in the fractional quantum Hall (FQH)
states are studied. We show how to experimentally measure the (optical) charges of the …

We show that in graphene epitaxially grown on SiC the Drude absorption is transformed into
a strong terahertz plasmonic peak due to natural nanoscale inhomogeneities, such as …

The progress of charge manipulation in semiconductor-based nanoscale devices opened
up a novel route to realise a flying qubit with a single electron. In the present review, we …

We have studied edge magnetoplasmons (EMP's) created by pulses of 100 ps width in a
high-mobility two-dimensional electron gas, using a cryogenic transistor. We find that …

Classical wave fields are real-valued, ensuring the wave states at opposite frequencies and
momenta to be inherently identical. Such a particle–hole symmetry can open up new …

Circulators are nonreciprocal circuit elements that are integral to technologies including
radar systems, microwave communication transceivers, and the readout of quantum …