Chemical and Biological Physics Guest SeminarDate:
Lecture / Seminar
Title: Magnetic impurities manipulation by chiral spin exchange interactions
Location: Gerhard M.J. Schmidt Lecture Hall
Lecturer: Prof Yossi Paltiel
Organizer: Department of Chemical and Biological Physics
Details: Applied Physics Department and the Center for Nano science and Nanotechnology, H ... Read more Applied Physics Department and the Center for Nano science and Nanotechnology, Hebrew University, Jerusalem
Abstract: Using the chiral induced spin selectivity (CISS) effect we were able to induce l ... Read more Using the chiral induced spin selectivity (CISS) effect we were able to induce local spin impurities on magnetic and superconducting material. Dynamic control of spin impurities was also achieved. The CISS is an electronic phenomenon in which electron transmission through chiral molecules depends on the direction of the electron spin. Thus charge displacement and transmission in chiral molecules generates a spin-polarized electron distribution. This effect; is metastable and may generate local magnetic defect that can be enhanced or removed by electric dipole. Also selective process may organize the molecules adsorption. In my talk I will show that when chiral molecules are adsorbed on the surface of thin ferromagnetic film, they induce magnetization perpendicular to the surface, without the application of current or external magnetic field. On s wave superconductors that are not magnetic, chiral molecules generate states that are similar to magnetic impurities, as well as change the order parameter of the superconductor. This metastable breaking of time reversal symmetry enables to: 1. achieve magnetic mapping with nanoscale resolution. 2. develop magnetic materials controlled at the nanoscale. 3. develop chiral gated controlled devices.