Experimental Condensed Matter

Research Interests

My laboratory measured the quasiparticle density of states of different superconductors by tunneling methods. Both mechanical junctions (scanning tunneling microscope, point contact, etc.) and planar type junctions are used. Electrons form pairs in a superconductor. We are interested in studying unconventional properties of these electron pairs found in novel superconductors. Some examples: (i) What is the angular dependence of the pairing strength? (ii) How will impurity doping affect the pairing of these electrons? (iii) How will the different types of pairs affect each other when the novel superconductor is placed close to a conventional superconductor? ....Come to visit us at CP 178 to see what we are doing.

Education

• B.Sc., Physics , University of Hong Kong
• Ph.D., Experimental Solid State Physics, Iowa State University

Graduate Students

• Saion Sinha and K.-W. Ng, "Zero Bias Conductance Peak Enhancement in Bi₂Sr₂CaCu₂O₈/Pb Tunneling Junctions", Superlattices and Microstructures 25, 1055 (1999).
• Anjan K. Gupta and K.- W. Ng, "Observation of Pseudogap in Underdoped Bi₂Sr₂CaCu₂O₈+d by Tunneling Spectroscopy", International Journal of Modern Physics B 12, 3271 (1998).
• Saion Sinha and K.-W. Ng, "Magnetic Field Dependence of the Zero Bias Conductance Peak Observed in Pb/BSCCO Junctions", Europhysics Letters. 44, 648 (1998).
• Anjan K. Gupta and K.-W. Ng, "ab-plane Tunneling Spectroscopy of Underdoped Bi₂Sr₂CaCu₂O_y", Physical Review B 58, R8901 (1998).
• Saion Sinha and K.-W. Ng, "Zero Bias Conductance Peak Enhancement in Bi₂Sr₂CaCu₂O₈/Pb Tunneling Junctions", Physical Review Letters 80, 1296 (1998).