We investigate the existence of the pure spin ratchet effect in a dissipative quasi-one-dimensional system with Rashba spin-orbit interaction. The system is additionally placed into a transverse uniform stationary in-plane magnetic field. It is shown that the effect exists at low temperatures and pure spin currents can be generated by applying an unbiased ac driving to the system. An analytical...

(S2) in the basis of spin projection onto the z axis. The local condensate spin is the expectation value 〈F̂〉 = ζ αF̂αβζβ of the spin operator F̂, defined as a vector of spin-1 Pauli matrices. Linear and quadratic Zeeman shifts, of strength g1 and g2 respectively, described by the last two terms of Eq. (S1), may arise from a weak external magnetic field B. Spin-independent and spin-dependent inter...

We consider the Kane-Mele model supplemented by a Hubbard U term. The phase diagram is mapped out using projective auxiliary field quantum Monte Carlo simulations. The quantum spin liquid of the Hubbard model is robust against weak spin-orbit interaction, and is not adiabatically connected to the spin-Hall insulating state. Beyond a critical value of U>U(c) both states are unstable toward magne...

A key concept in the emerging field of spintronics is the gate voltage or electric field control of spin precession via the effective magnetic field generated by the Rashba spin-orbit interaction. Here, we demonstrate the generation and tuning of electric field induced Rashba spin-orbit interaction in InAs nanowires where a strong electric field is created by either a double gate or a solid ele...

The spin-orbit interaction plays a crucial role in diverse fields of condensed matter, including the investigation of Majorana fermions, topological insulators, quantum information and spintronics. In III-V zinc-blende semiconductor heterostructures, two types of spin-orbit interaction--Rashba and Dresselhaus--act on the electron spin as effective magnetic fields with different directions. They...

The electronic structure of the metallic Ti2O3 and insulating phases has been investigated using a combination of the three-dimensional periodic shell model and the discrete-variational (DV)-Xa cluster method. Besides the effects of intersite repulsive nearest-neighbor electron-electron (d-d) Coulombic interaction and the spin-spin interaction by means of a generalized Hubbard Hamiltonian, the ...

The low temperature nuclear spin±lattice relaxation mechanism caused by the effective interaction between nuclear spins and two-level systems (TLS), arising from a paramagnetic centre interaction with TLS by means of g-factor modulation and the electron±nuclear dipole±dipole interaction, is investigated. It is shown, that this mechanism of the nuclear spin±lattice relaxation is effective under ...

A system consisting of two neutral spin-1/2 particles is analyzed for two magnetic field perturbations: (1) an inhomogeneous magnetic field over all space, and (2) external fields over a half space containing only one of the particles. The field is chosen to point from one particle to the other, which results in essentially a onedimensional problem. A number of interesting features are revealed...