Complex States, Emergent Phenomena & Superconductivity in Intermetallic & Metal-like Compounds


Project Leader(s):
Paul Canfield

Principal Investigators:
Sergey Bud'ko, Paul Canfield, John Clem, David Johnston, Adam Kaminski, Vladimir Kogan, Ruslan Prozorov, Makariy Tanatar,

Postdoctoral Research Associates:
Kyuil Cho, Abhishek Pandey


The specific scientific question to be addressed by this Project is—can we develop, discover, understand and ultimately control, and predictably modify new and extreme examples of complex states, emergent phenomena, and superconductivity? Materials manifesting clear or compelling examples (or combinations) of superconductivity, strongly correlated electrons, quantum criticality, and exotic, bulk magnetism are of particular interest given their potential to lead to revolutionary steps forward in our understanding of their complex, and potentially energy relevant, properties. Experiment and theory are implemented synergistically. The experimental work consists of new materials development and crystal growth, combined with detailed and advanced measurements of microscopic, thermodynamic, and transport properties, as well as electronic structure, at extremes of pressure, temperature, magnetic field and resolution. The theoretical work focuses on modeling transport, thermodynamic and spectroscopic properties using world-leading, phenomenological approaches to superconductors and modern quantum many-body theory.

The ability to address these questions is illustrated by this group’s past work on many of the key systems and phenomena that have defined this field over the past decades: High Tc oxide, RNi2B2C and MgB2 superconductivity, Ce-, Yb- and transition metal-based heavy fermions, quantum criticality, quasicrystals, spin glasses, spin ladders / spin chains, vortex and domain pattern formation, ferromagnetism and metamagnetism.

  • Design and growth (P. C. Canfield, S. Bud’ko, D. C. Johnston, J. Schmalian,V. Kogan)
  • Advanced Characterization (S. Bud’ko, Y. Furukawa, A. Kaminski, R. Prozorov, M. Tanatar)
  • Theory and modeling (J. R. Clem, V. Kogan, J. Schmalian)


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Lin X; Bud'ko S L; Samolyuk G D; Torikachvili M S; Canfield P C . 2011. Physical properties of SrSn(4) single crystals. Journal of Physics-Condensed Matter. 23:455703. abstract
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Torikachvili M S; Davis B K; Kothapalli K; Nakotte H; Schultz A J; Mun E D; Bud'ko S L . 2011. Structural, electronic, magnetic, and thermal properties of single-crystalline UNi(0.5)Sb(2). Physical Review B. 84:205114. abstract
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Levin E M; Bud'ko S L . 2011. Bulk magnetization and H-1 NMR spectra of magnetically heterogeneous model systems. Journal of Magnetism and Magnetic Materials. 323:2355-2361. abstract
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Kim S K; Torikachvili M S; Colombier E; Thaler A; Bud'ko S L; Canfield P C . 2011. Combined effects of pressure and Ru substitution on BaFe(2)As(2). Physical Review B. 84:134525. abstract
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Clem J R . 2011. Effect of nearby Pearl vortices upon the I(c) versus B characteristics of planar Josephson junctions in thin and narrow superconducting strips. Physical Review B. 84:134502. abstract
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Bonalde I; Kim H; Prozorov R; Rojas C; Rogl P; Bauer E . 2011. Evidence for conventional superconducting behavior in noncentrosymmetric Mo(3)Al(2)C. Physical Review B. 84:134506. abstract
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Jia Y; Welp U; Crabtree G W; Kwok W K; Malozemoff A P; Rupich M W; Fleshler S; Clem J R . 2011. Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes. Journal of Applied Physics. 110:083923. abstract
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Thaler A; Hodovanets H; Torikachvili M S; Ran S; Kracher A; Straszheim W; Yan J Q; Mun E; Canfield P C . 2011. Physical and magnetic properties of Ba(Fe(1-x)Mn(x))(2)As(2) single crystals. Physical Review B. 84:144528. abstract
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Zhao L L; Kim S K; McCandless G T; Torikachvili M S; Canfield P C; Chan J Y; Morosan E . 2011. Effects of chemical doping and pressure on CaFe(4)As(3). Physical Review B. 84:104444. abstract
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Shi D L; He P; Zhao P; Guo F F; Wang F; Huth C; Chaud X; Bud'ko S L; Lian J . 2011. Magnetic alignment of Ni/Co-coated carbon nanotubes in polystyrene composites. Composites Part B-Engineering. 42:1532-1538. abstract
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