Quantum World at Atomic Scale:

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Presentation transcript:

Quantum World at Atomic Scale: Spin-Polarized Scanning Tunneling Microscopy Pin-Jui Hsu1,2 (徐斌睿) 1. Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany 2. Department of Physics, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan Fe-DL/ Rh(001) Fe-TL/ Ir(111) H/ Fe-DL/ Ir(111) 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Outline Research Motivation To image, detect, and manipulate low-dimensional systems by SP-STM with spin resolution. Introductions & Literatures What SP-STM can do ? Atomic Spin Lattice : Non-collinear Magnetism Chiral Domain Wall, Spin Spiral, Magnetic Skyrmions SP-STS : LDOS, QPI, IETS, Image State, Landau Splitting, QPC Kondo Resonance, Band Dispersion, Phonon Excitation Atom Manipulation : Zeeman Splitting, Magnetic Hysteresis Magnetic Moment, Magnetocrystalliine Anisotropy, RKKY Coupling Strength Time Resolution : Pump-Probe Dynamics, Atomic Dipolar Fields Electron Spin Resonance, Dipole-dipole Interaction Summary & Future Highlights 2017/12/09 pinjuihsu@phys.nthu.edu.tw

The Nobel Prize in Physics 1986 ~ Scanning Tunneling Microscopy Background The Nobel Prize in Physics 1986 ~ ”See” the atomic scale world !! "for his fundamental work in electron optics, and for the design of the first electron microscope" "for their design of the scanning tunneling microscope" 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Working Principle 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Operation Modes 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Working Principle 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Various Systems 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Experimental Instruments Various types of STM in Hamburg Home built 4K-STM with 3D Magnets Home built 300 mK-STM with 12T Magnet 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Experimental Instruments Various types of STM in Hamburg 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Experimental Instruments Various types of STM in Hamburg 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Scanner Piezo Tube Tube Scanners 2017/12/09 2017/12/09 pinjuihsu@phys.nthu.edu.tw pinjuihsu@phys.nthu.edu.tw 11

Scanning Tunneling Microscopy Scanner Piezo Tube 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Scanner Piezo Tube 2017/12/09 2017/12/09 pinjuihsu@phys.nthu.edu.tw pinjuihsu@phys.nthu.edu.tw 13

Scanning Tunneling Microscopy Scanner Piezo Tube 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Scanner Piezo Tube 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Coarse Piezo Motor 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Microscopy Coarse Piezo Motor ΔZfine ≥ ΔZcoarse 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Spectroscopy Working Principle 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Spectroscopy Working Principle E-EF (meV) dI/dU (a. u.) MnPc → Kondo resonance. 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Spectroscopy Working Principle 2017/12/09 pinjuihsu@phys.nthu.edu.tw

Scanning Tunneling Spectroscopy Working Principle 2017/12/09 pinjuihsu@phys.nthu.edu.tw