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Superconductivity
Gordon Research Conference

Unconventional Superconductivity: Materials and Mechanisms

Dates

May 24-29, 2015

Location

The Chinese University of Hong Kong
Hong Kong, China

Organizers

Chair:
Hai-Hu Wen

Vice Chair:
Andrey Chubukov

Meeting Description

Superconductivity has not only fundamental impact on condensed matter physics, but also strong potential for applications. The 2015 Gordon Conference on Superconductivity will present the cutting-edge developments in this fascinating field and will chiefly focus on unconventional superconductivity. The conference will lead to in-depth discussions on the exploration of novel superconducting materials, including cuprates, iron based superconductors, heavy-fermion, and other superconductors. For the cuprates, the emphasis will be on precursors to superconductivity, charge order in the pseudogap state, and the role of Mott physics. For iron superconductors, the emphasis will be on the pairing mechanism, the gap symmetry, and the nematic order. The conference will discuss a number of hot issues concerning unconventional superconductivity, on which no consensus has been reached yet. These include the role of spin-fluctuation pairing mechanism, quantum criticality, interface superconductivity, topological superconductivity, etc. This will be a focused, content-rich workshop on modern approaches to superconductivity in the second decade of 21st century.

Related Meeting

This GRC was held in conjunction with the "Superconductivity" Gordon Research Seminar (GRS). Refer to the associated GRS program page for more information.

Contributors

Final Meeting Program

Sunday
2:00 pm - 8:00 pmArrival and Check-in
6:00 pmDinner
7:30 pm - 7:40 pmWelcome / Introductory Comments by GRC Site Staff
7:40 pm - 9:30 pmNewly Discovered Superconducting Materials
Discussion Leader: Hidenori Takagi (Max Planck Institute for Solid State Research, Germany)
7:40 pm - 7:50 pmIntroduction by Discussion Leader
7:50 pm - 8:05 pmPaul Canfield (Iowa State University, USA)
"The Hows and Whys of Searching for New Superconducting Systems"
8:05 pm - 8:10 pmDiscussion
8:10 pm - 8:25 pmMikhail Eremets (Max Planck Institute for Chemistry, Germany)
"Superconductivity at 190 K in H2S Under 200GPa"
8:25 pm - 8:30 pmDiscussion
8:30 pm - 8:45 pmJianlin Luo (Institute of Physics, Chinese Academy of Sciences, China)
"Superconductivity on the Border of Double Helical Antiferromagnetic Order in CrAs and Related Materials"
8:45 pm - 8:50 pmDiscussion
8:50 pm - 9:05 pmZhu-An Xu (Zhejiang University, China)
"Unconventional Superconductivity in New Quasi-1D Superconductors"
9:05 pm - 9:10 pmDiscussion
9:10 pm - 9:25 pmYoshikazu Mizuguchi (Tokyo Metropolitan University, Japan)
"Superconductivity in Layered Bi-Based Chalcogenides"
9:25 pm - 9:30 pmDiscussion
Monday
7:30 am - 8:30 amBreakfast
9:00 am - 12:30 pmNovel Iron-Based Superconducting Materials
New trend of iron based superconductors and monolayer FeSe thin film.
Discussion Leader: Andrey Chubukov (University of Minnesota, USA)
9:00 am - 9:10 amIntroduction by Discussion Leader
9:10 am - 9:30 amQikun Xue (Tsinghua University, China)
"Interface Enhanced Superconductivity"
9:30 am - 9:35 amDiscussion
9:35 am - 9:55 amDonglai Feng (Fudan University, China)
"Superconductivity in Iron Selenides with only Electron Fermi Surfaces"
9:55 am - 10:00 amDiscussion
10:00 am - 10:20 amJennifer Hoffman (Harvard University, USA)
"Quasiparticle Interference Imaging of Single-Layer FeSe"
10:20 am - 10:25 amDiscussion
10:25 am - 10:50 amGroup Photo / Coffee Break
10:50 am - 11:10 amXingjiang Zhou (Institute of Physics, Chinese Academy of Sciences, China)
"Evolution of Electronic Structure and Superconductivity with Doping and Number of FeSe Layers in FeSe/SrTiO3 Films"
11:10 am - 11:15 amDiscussion
11:15 am - 11:35 amDunghai Lee (University of California, Berkeley, USA)
"Is FeSe a Nematic Quantum Paramagnet?"
11:35 am - 11:40 amDiscussion
11:40 am - 12:00 pmXianhui Chen (University of Science and Technology of China, China)
"Phase Diagram in Novel Superconductor (Li,Fe)OHFeSe"
12:00 pm - 12:05 pmDiscussion
12:05 pm - 12:25 pmCedomir Petrovic (Brookhaven National Laboratory, USA)
"Superconducting and Normal States in Iron Chalcogenides"
12:25 pm - 12:30 pmDiscussion
12:30 pmLunch
1:30 pm - 4:00 pmFree Time
4:00 pm - 6:00 pmPoster Session
6:00 pmDinner
7:30 pm - 9:30 pmNematicity and Orbital Physics in Iron Based Superconductors
Discussion Leader: Joerg Schmalian (Karlsruhe Institute of Technology, Germany)
7:30 pm - 7:40 pmIntroduction by Discussion Leader
7:40 pm - 8:00 pmRafael Fernandes (University of Minnesota, USA)
"Nematicity in Chalcogenides and Chirality in Pnictides: A Unified Picture of Emergent Paramagnetic Phases in Iron-Based Superconductors"
8:00 pm - 8:05 pmDiscussion
8:05 pm - 8:25 pmHiroshi Kontani (Nagoya University, Japan)
"Why Orbital Order and Fluctuations Originate from the Coulomb Interaction in Multiorbital Hubbard Models?"
8:25 pm - 8:30 pmDiscussion
8:30 pm - 8:50 pmA. N. Pasupathy (Columbia University, USA)
"Electronic Nematicity in the Iron Pnictides as Visualized by STM"
8:50 pm - 8:55 pmDiscussion
8:55 pm - 9:15 pmPengcheng Dai (Rice University, USA / Institute of Physics, CAS, China)
"An Antiferromagnetic Insulator Neariron Pnictide Superconductors"
9:15 pm - 9:20 pmDiscussion
9:20 pm - 9:30 pmGeneral Discussion
Tuesday
7:30 am - 8:30 amBreakfast
9:00 am - 12:30 pmGap Symmetry and Phase Diagram of Iron Based Superconductors
Discussion Leader: Lu Yu (Institute of Physics, Chinese Academy of Sciences, China)
9:00 am - 9:10 amIntroduction by Discussion Leader
9:10 am - 9:30 amPeter Hirschfeld (University of Florida, USA)
"Novel Aspects of Impurities in Fe-Based Superconductors"
9:30 am - 9:35 amDiscussion
9:35 am - 9:55 amAntony Carrington (University of Bristol, United Kingdom)
"Gap Structure and Anomalous Critical Fields in BaFe2(As1-xPx)2"
9:55 am - 10:00 amDiscussion
10:00 am - 10:20 amJiangping Hu (Purdue University, USA / IOP-CAS, China)
"Magnetism and Pairing Mechanism From Iron-Based Superconductors"
10:20 am - 10:25 amDiscussion
10:25 am - 10:50 amCoffee Break
10:50 am - 11:10 amRuslan Prozorov (Ames Laboratory, USA)
"Using Controlled Disorder to Study Superconducting Gap Structure"
11:10 am - 11:15 amDiscussion
11:15 am - 11:35 amHideo Hosono (Tokyo Institute of Technology, Japan)
"Recent Advances in Iron-Based Superconductors"
11:35 am - 11:40 amDiscussion
11:40 am - 12:00 pmTakasada Shibauchi (University of Tokyo, Japan)
"Pairing Symmetry and Quantum Criticality in BaFe2(As,P)2"
12:00 pm - 12:05 pmDiscussion
12:05 pm - 12:25 pmTetsuo Hanaguri (RIKEN, Japan)
"Quasi-Particle Interference and Superconducting Gap in FeSe"
12:25 pm - 12:30 pmDiscussion
12:30 pmLunch
1:30 pm - 4:00 pmFree Time
4:00 pm - 6:00 pmPoster Session
6:00 pmDinner
7:30 pm - 9:30 pmPairing Mechanism of Iron-Based and Cuprate Superconductors
Discussion Leader: Nanlin Wang (Peking University, China)
7:30 pm - 7:40 pmIntroduction by Discussion Leader
7:40 pm - 8:00 pmBernhard Keimer (Max Planck Institute for Solid State Research, Germany)
"Spin and Charge Fluctuations in Cuprate Superconductors"
8:00 pm - 8:05 pmDiscussion
8:05 pm - 8:25 pmIlya Eremin (Ruhr-Universitaet Bochum, Germany)
"Magnetic and Orbital Ordering in Iron-Based Superconductors: Role of Spin-Orbit Coupling"
8:25 pm - 8:30 pmDiscussion
8:30 pm - 8:50 pmGabriel Kotliar (Rutgers University, USA)
"Superconducting Order Parameter of the Iron Pnictide Materials and the Antiphase s+- state"
8:50 pm - 8:55 pmDiscussion
8:55 pm - 9:15 pmYuji Matsuda (Kyoto University, Japan)
"BCS-BEC Crossover in FeSe"
9:15 pm - 9:20 pmDiscussion
9:20 pm - 9:30 pmGeneral Discussion
Wednesday
7:30 am - 8:30 amBreakfast
9:00 am - 12:30 pmFeature of Pseudogap in Cuprate Superconductors
Competing orders, CDW, Stripe, and nematicity.
Discussion Leader: Zheng-Yu Weng (Tsinghua University, China)
9:00 am - 9:10 amIntroduction by Discussion Leader
9:10 am - 9:30 amZhixun Shen (Stanford University, USA)
"Direct Spectroscopic Evidence for Phase Competition Between the Pseudogap and Superconductivity in Bi2Sr2CaCu2O8+delta"
9:30 am - 9:35 amDiscussion
9:35 am - 9:55 amMartin Greven (University of Minnesota, USA)
"Neutron, X-Ray and Charge Transport Measurements of HgBa2CuO4+delta"
9:55 am - 10:00 amDiscussion
10:00 am - 10:20 amLouis Taillefer (University of Sherbrooke, Canada)
"Nematicity and Fermi-Surface Reconstruction in the Pseudogap Phase of Cuprate Superconductors"
10:20 am - 10:25 amDiscussion
10:25 am - 10:50 amCoffee Break
10:50 am - 11:10 amJ. C. Seamus Davis (Cornell University, USA)
"Atomic-Scale Antagonism Between d-Symmetry Cooper Pairs and d-Symmetry Density Waves in Underdoped Cuprates"
11:10 am - 11:15 amDiscussion
11:15 am - 11:35 amYayu Wang (Tsinghua University, China)
"Visualizing the Evolution from the Mott Insulator to a Charge Ordered Insulator in Lightly Doped Cuprates"
11:35 am - 11:40 amDiscussion
11:40 am - 12:00 pmRichard Greene (University of Maryland, USA)
"New Perspectives on the Origin of the Superconductivity and the 'Pseudogap'"
12:00 pm - 12:05 pmDiscussion
12:05 pm - 12:25 pmAndrea Damascelli (University of British Columbia, Canada)
"Charge Order in Cuprates: From Hole to Electron Doping"
12:25 pm - 12:30 pmDiscussion
12:30 pmLunch
1:30 pm - 4:00 pmFree Time
4:00 pm - 6:00 pmPoster Session
6:00 pmDinner
7:00 pm - 7:30 pmBusiness Meeting
Nominations for the Next Vice Chair; Fill in Conference Evaluation Forms; Discuss Future Site and Scheduling Preferences; Election of the Next Vice Chair
7:30 pm - 9:30 pmHeavy Fermion Superconductors and Quantum Criticality
Discussion Leader: Laura Greene (University of Illinois at Urbana-Champaign, USA)
7:30 pm - 7:40 pmIntroduction by Discussion Leader
7:40 pm - 8:00 pmM. Brian Maple (University of California, San Diego, USA)
"Quantum Criticality and Unconventional Superconductivity in the Heavy Fermion System Ce1-xYbxCoIn5"
8:00 pm - 8:05 pmDiscussion
8:05 pm - 8:25 pmPiers Coleman (Rutgers University, USA)
"Composite vs. Spin Fluctuation Pairing in the Heavy Fermion Superconductors: The Remarkable Case of Yb doped CeCoIn5"
8:25 pm - 8:30 pmDiscussion
8:30 pm - 8:50 pmQimiao Si (Rice University, USA)
"Local-Moment Magnetism, Quantum Criticality and Heavy Fermion Superconductivity"
8:50 pm - 8:55 pmDiscussion
8:55 pm - 9:15 pmFrank Steglich (Max Planck Institute for Chemical Physics of Solids, Germany)
"Emergence of Heavy-Electron Superconductivity by the Ordering of Nuclear Spins"
9:15 pm - 9:20 pmDiscussion
9:20 pm - 9:30 pmGeneral Discussion
Thursday
7:30 am - 8:30 amBreakfast
9:00 am - 12:30 pmSuperconductivity in Confined and Topological Systems
Discussion Leader: Tai-Kai Ng (Hong Kong Academy for Gifted Education, Hong Kong SAR China)
9:00 am - 9:10 amIntroduction by Discussion Leader
9:10 am - 9:30 amLiang Fu (Massachusetts Institute of Technology, USA)
"Topological Superconductivity from Odd-Parity Pairing"
9:30 am - 9:35 amDiscussion
9:35 am - 9:55 amAli Yazdani (Princeton University, USA)
"Topological Superconductivity and Majorana Zero Modes in Chains of Magnetic Atoms on a Superconductor Surface"
9:55 am - 10:00 amDiscussion
10:00 am - 10:20 amIvan Bozovic (Brookhaven National Laboratory, USA)
"Insights in the Physics of Cuprates from the Study of MBE-Grown Films and Heterostructures"
10:20 am - 10:25 amDiscussion
10:25 am - 10:55 amCoffee Break
10:55 am - 11:15 amYoshihiro Iwasa (University of Tokyo, Japan)
"Gate-Induced Superconductivity in Two-Dimensional Crystals"
11:15 am - 11:20 amDiscussion
11:20 am - 11:40 amJinfeng Jia (Shanghai Jiaotong University, China)
"Topological Superconductor by Proximity Effect and Majorana Mode in a Vortex Core"
11:40 am - 11:45 amDiscussion
11:45 am - 11:55 amTing-Kuo Lee (Institute of Physics, Academia Sinica, Taiwan)
"Charge Orders in Cuprates"
11:55 am - 12:05 pmDiscussion
12:05 pm - 12:15 pmWei-Sheng Lee (SLAC National Accelerator Lab, USA)
"Charge Density Wave in YBa2Cu3O6.67 at High Magnetic Fields"
12:15 pm - 12:25 pmDiscussion
12:25 pm - 12:30 pmGeneral Discussion
12:30 pmLunch
1:30 pm - 4:00 pmFree Time
4:00 pm - 6:00 pmModern Ideas and Understanding on Unconventional Superconductivity
Discussion Leader: Fuchun Zhang (Zhejiang University, China)
4:00 pm - 4:10 pmIntroduction by Discussion Leader
4:10 pm - 4:30 pmAharon Kapitulnik (Stanford University, USA)
"Tests for Time Reversal Symmetry Breaking in Unconventional Superconductors"
4:30 pm - 4:35 pmDiscussion
4:35 pm - 4:55 pmHong Ding (Institute of Physics, Chinese Academy of Sciences, China)
"Recent ARPES Results of Iron-Based Superconductors"
4:55 pm - 5:00 pmDiscussion
5:00 pm - 5:20 pmDirk Van Der Marel (University of Geneva, Switzerland)
"Universal Fermi-Liquid Scaling and Quasiparticles Beyond Landau Theory in Sr2RuO4"
5:20 pm - 5:25 pmDiscussion
5:25 pm - 5:45 pmTao Xiang (Institute of Physics, Chinese Academy of Sciences, China)
"Raising Tc by Lifting the Sigma-Bonding Bands to the Fermi Surface"
5:45 pm - 5:50 pmDiscussion
5:50 pm - 6:00 pmClosing Remarks
6:00 pmDinner
Friday
7:30 am - 8:30 amBreakfast
9:00 amDeparture

Any opinions, findings, conclusions or recommendations expressed in this material/event (or by members of the project team) do not reflect the views of the Government of the Hong Kong Special Administrative Region, the Innovation and Technology Commission or the Vetting Committee of the General Support Programme of the Innovation and Technology Fund.
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