Comprehensive theory of second-order spin photocurrents

  title={Comprehensive theory of second-order spin photocurrents},
  author={Jae-Mo Lihm and Cheol-Hwan Park},
  journal={Physical Review B},
The spin photocurrents, direct currents induced by light, hold great promise for introducing new elements to spintronics. However, a general theory for spin photocurrents in real materials which is applicable to systems with spin-orbit coupling or noncollinear magnetism is absent. Here, we develop such a general theory of second-order spin photocurrents. We find that the secondorder spin photocurrents can be classified into Drude, Berry curvature dipole, shift, injection, and rectification… 

Magnetic Proximity Evoked Colossal Bulk Photovoltaics in Crystalline Symmetric Layers

Bulk photovoltaic (BPV) effect, a second order nonlinear process that generates static current under light irradiation, requires centrosymmetric broken systems as its application platform. In order

Unifying semiclassics and quantum perturbation theory at nonlinear order

Nonlinear electrical response permits a unique window into effects of band structure geometry. It can be calculated either starting from a Boltzmann approach for small frequencies, or using Kubo’s



Switchable Enhanced Spin Photocurrent in Rashba and Cubic Dresselhaus Ferroelectric Semiconductors.

This work predicts an efficient spin-light conversion via the Rashba and higher-order cubic Dresselhaus SOIs in ferroelectrics and gives hope to generating and controlling light-driven SC via a nonvolatile electric field.

Pure bulk orbital and spin photocurrent in two-dimensional ferroelectric materials

We elucidate a bias-free light-induced orbital and spin current through nonlinear response theory, which generalizes the well-known bulk photovoltaic effect in centrosymmetric broken materials from

Intrinsic Spin Photogalvanic Effect in Nonmagnetic Insulator

We show that with the help of spin-orbit coupling, nonlinear light-matter interactions can efficiently couple with spin and valley degrees of freedom. This revealed spin photogalvanic effect can

Chiral Photocurrent in Parity-Violating Magnet and Enhanced Response in Topological Antiferromagnet

Rectified electric current induced by irradiating light, so-called photocurrent, is an established phenomenon in optoelectronic physics. In this paper, we present a comprehensive classification of

Nonlinear spin current generation in noncentrosymmetric spin-orbit coupled systems

Spin current plays a central role in spintronics. In particular, finding more efficient ways to generate spin current has been an important issue and studied actively. For example, representative

Spin-galvanic effect

In contrast to previous experiments, where spin-polarized currents were driven by electric fields in semiconductor, the complementary situation where electron spins drive a current without the need of an external electric field is demonstrated.

Spin Hall effect in prototype Rashba ferroelectrics GeTe and SnTe

Ferroelectric Rashba semiconductors (FERSCs) have recently emerged as a promising class of spintronics materials. The peculiar coupling between spin and polar degrees of freedom responsible for

Zero-bias spin separation

The generation, manipulation and detection of spin-polarized electrons in low-dimensional semiconductors are at the heart of spintronics. Pure spin currents, that is, fluxes of magnetization without

Prediction of a linear spin bulk photovoltaic effect in antiferromagnets.

Here we predict the existence of a linear bulk spin photovoltaic effect, where spin currents are produced in antiferromagnetic materials as a response to linearly polarized light, and we describe the

Persistent spin current in nanodevices and definition of the spin current

We investigate two closely related subjects: (i) the existence of a pure persistent spin current without an accompanying charge current in a semiconducting mesoscopic device with a spin-orbit