Complex oxides with 4 d and 5 d transition-metal ions recently emerged as a new paradigm
in correlated electron physics, due to the interplay between spin–orbit coupling and electron …

When the continuous symmetry of a physical system is spontaneously broken, two types of
collective modes typically emerge: the amplitude and the phase modes of the order …

Quantum phase transitions (QPTs) involve transformations between different states of matter
that are driven by quantum fluctuations. These fluctuations play a dominant part in the …

A supersolid is a counter-intuitive state of matter that combines the frictionless flow of a
superfluid with the crystal-like periodic density modulation of a solid,. Since the first …

These lecture notes introduce quantum spin systems and several computational methods for
studying their ground‐state and finite‐temperature properties. Symmetry‐breaking and …

The order parameter and its variations in space and time in many different states in
condensed matter physics at low temperatures are described by the complex function Ψ (r …

Ultrafast responses of BCS superconductor Nb 1-x Ti x N films in a nonadiabatic excitation
regime were investigated by using terahertz (THz) pump-THz probe spectroscopy. After an …

Understanding exotic forms of magnetism in quantum mechanical systems is a central goal
of modern condensed matter physics, with implications for systems ranging from high …

Quantum phase transitions take place between distinct phases of matter at zero
temperature. Near the transition point, exotic quantum symmetries can emerge that govern …

At the liquid–gas phase transition in water, the density has a discontinuity at atmospheric
pressure; however, the line of these first-order transitions defined by increasing the applied …