The physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

Studies of the electromagnetic response of various classes of correlated electron materials
including transition-metal oxides, organic and molecular conductors, intermetallic …

It is remarkable how the Fröhlich polaron, one of the simplest examples of a Quantum Field
Theoretical problem, as it basically consists of a single fermion interacting with a scalar Bose …

One of the main challenges in understanding high-T c superconductivity is to disentangle
the rich variety of states of matter that may coexist, cooperate or compete with d-wave …

While basic features of polarons were well recognized a long time ago and have been
described in a number of review papers and textbooks, interest in the role of electron …

Time-resolved photoelectron spectroscopy is employed to study the dynamics of
photoexcited electrons in optimally doped Bi 2 Sr 2 CaCu 2 O 8+ δ (Bi-2212). Hot electrons …

Nonequilibrium pump-probe time-domain spectroscopies can become an important tool to
disentangle degrees of freedom whose coupling leads to broad structures in the frequency …

The large variations in T c across the cuprate families is one of the major unsolved puzzles
in condensed matter physics and is poorly understood. Although there appears to be a great …

Despite over two decades of intense research efforts, the origin of high-temperature
superconductivity in the copper oxides remains elusive. Angle-resolved photoemission …

We determined electronic relaxation times via pump-probe optical spectroscopy using sub-
15 fs pulses for the normal state of two different cuprate superconductors. We show that the …