Prof. Jianlin Luo (雒建林) [Institute of Physics, CAS, China]

Title: Superconductivity in the vicinity of double helical magnetic order in CrAs and MnP

Time: 11:00 - 12:00 PM, Friday, May 19, 2017

Place: Auditorium Room 410, HPSTAR (Shanghai)

Host: Dr. Lin Wang

Abstract

One of the common features of unconventional superconducting systems such as the heavy-fermions, high transition-temperature cuprates and iron pnictides is that the superconductivity emerges in the vicinity of long-range antiferromagnetically ordered state. In this talk I will present the discovery of superconductivity on the verge of magnetic order in CrAs and MnP via the application of external high pressure. Bulk superconductivity with Tc = 2 K for CrAs emerges at critical pressure Pc = 0.8 GPa, and Tc = 1 K for MnP at about 8 GPa were observed. In addition, quantum criticality and non-Fermi liquid behavior are observed in CrAs under physical and chemical pressure. The present finding opens a new avenue for searching novel superconductors in the Cr- and Mn-based transitional metal compounds.

   Wei Wu, et al., Nat. Commun. 5 (2014) 5508.

   Cheng J-G, et al., Phys. Rev. Lett. 114 (2015) 117001.

Biography of the Speaker:

B. S., Peiking University, 1987

Ph D., Chinese Academy of Sciences, 2002

Associate professor, Cryogenic Laboratory, CAS, 1998

Professor, Institute of Physics, CAS, 2005-present

Research Interests：

Research on low temperature physical properties of strongly correlated electron system and unconventional superconductors studied by NMR, specific heat and transport measurements. Current work includes studies of magnetism and superconductivity in iron-based high Tc superconductors, layered triangular system, and quantum spin gap system. The work also includes to develop a new high resolution differential specific heat measurement system. He published more than 180 papers (including 24 Physical Review Letters, Nature and affiliated journals) with more than 9000 citations.

Prizes/Awards/Honours

1)The National Science Fund for Distinguished Young Scholars.

2)Since 2014, for three consecutive years ranked Thomson Reuters “Highly cited scientists” list.

3)Committee Member of Chinese Society of Physics (Low Temperature).