Perhaps the most important aspect of symmetry in physics is the idea that a state does not
need to have the same symmetries as the theory that describes it. This phenomenon is …

We theoretically study the generation of spin current due to a surface acoustic wave (SAW)
in a superconductor. We model an s-wave superconductor as the mean-field Hamiltonian …

We demonstrate the general principle which states that a dissipationless spin current flows
between two coupled ferromagnets if their magnetic orders are misaligned. This principle …

A system exhibiting multiple simultaneously broken symmetries offers the opportunity to
influence physical phenomena such as tunneling currents by means of external control …

We study equilibrium pure spin current through tunneling junctions at zero bias. The two
leads of the junctions connected via a thin insulator barrier, can be either a ferromagnetic …

We propose theoretically a spinlike Andreev reflection that may occur at the interface of a
semimetal and a doped excitonic insulator. In contrast to the usual Andreev reflection, this …

We study Josephson-like junctions formed by materials with antiferromagnetic (AF) order
parameters. As an antiferromagnet, we consider a two-band material in which a spin density …

By discussing field-induced quantum interference effects due to monopole moments and
those due to dipole moments on equal footing, their similarities and differences are clarified …

The Josephson effect is generally described as Cooper-pair tunneling but it can also be
understood in a more general context. The dc Josephson effect is the pseudo-Goldstone …

We report a theoretical study of the equilibrium spin current (ESC) flowing in a ferromagnet/
ferromagnet (FM/FM) graphene junction with noncollinear magnetizations, in which the FM …