1 / 14

Department of Physics, Fudan University Zhang Chi

高温超导系列实验. Department of Physics, Fudan University Zhang Chi 06301020080. OUTLINE. Motivation Crystal Growth Transition temperature measurement of superconductor

jefferym
Download Presentation

Department of Physics, Fudan University Zhang Chi

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 高温超导系列实验 Department of Physics, Fudan University Zhang Chi 06301020080

  2. OUTLINE • Motivation • Crystal Growth • Transition temperature measurement of superconductor • X-ray powder diffraction • Cu spin-echo NMR spectrum • Future work

  3. MOTIVATION • Theoretical Prediction • Fermi-liquid theory : particles (with charge and spin) • Luttinger liquids theory : Spin–Charge Separation: holons (charge with no spin) and spinons (spin with no charge) • Experimental Observation • Completely new paradigm for the physics of electron systems • ARPES • Thermal conductivity measurements

  4. Single Crystal Growth of 1-D SrCuO2 • Structure : One dimensional: Linear Zigzag Ladder • Floating Zone technique: • Produce Large High Quality Single Crystal

  5. weight • Mix and ground • bake SrCO3 CuO Hydrostatic press Initial materials Vertical furnace Floating Zone Furnace

  6. Operating procedure • Prepare for sample stick Hydrostatic press

  7. Sintering preparation for sample stick • Sintering of sample stick Vertical Furnace

  8. Optical Floating Zone Furnace • feed rod • flux • seed rod

  9. 超导转变温度（Tc）测量 • 零电阻现象 (R=0) • 迈斯纳（Meissner）效应 (B=0) R-T测量装置 实验线路图 （四引线法） • Tc = 98 K • 从高温到低温

  10. X射线粉末（多晶）衍射 (YBCO) Sinθ=nλ/2 d 衍射峰位置2θ，衍射峰强度I，衍射峰形状f(x) a= 0.382 b= 0.388 c= 1.169

  11. XRD ( SrCuO2) Polycrystalline Single Crystal

  12. 金属的自旋回波频谱 Phys.Rev.B 69,132415(2004)

  13. ARPES spin–charge separation Thermal conductivity B.J.Kim, et al. Nature 2,397(2006) A.V. Sologubenko, et al. Phys. Rev. B 64, 054412 (2001)

  14. Thank you !

More Related