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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Kim H; Kogan V G; Cho K; Tanatar M A; Prozorov R . 2013. Rutgers relation for the analysis of superfluid density in superconductors. Physical Review B. 87:214518. abstract
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Galvis J A; Suderow H; Vieira S; Bud'ko S L; Canfield P C . 2013. Scanning tunneling microscopy in the superconductor LaSb2. Physical Review B. 87:214504. abstract
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Arsenijevic S; Hodovanets H; Gaal R; Forro L; Bud'ko S L; Canfield P C . 2013. Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2. Physical Review B. 87:224508. abstract
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Anand V K; Kim H; Tanatar M A; Prozorov R; Johnston D C . 2013. Superconducting and normal-state properties of APd(2)As(2) (A = Ca, Sr, Ba) single crystals. Physical Review B. 87:224510. abstract
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Quinn K; Ryan D H; Canfield P C; Bud'ko S L; Cadogan J M . 2013. A search for field-induced ordering in the optimally doped Ba(Fe, Co)(2)As-2 superconductor. Journal of Applied Physics. 113:17e127. abstract
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Hodovanets H; Ran S; Canfield P C; Bud'ko S L . 2013. Boron isotope effect in single crystals of ErNi2B2C superconductor. Philosophical Magazine. 93:1748-1754. abstract
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Wang C L; Zou J D; Liu J; Mudryk Y; Gschneidner K A; Long Y; Smetana V; Miller G J; Pecharsky V K . 2013. Crystal structure, magnetic properties, and the magnetocaloric effect of Gd5Rh4 and GdRh. Journal of Applied Physics. 113:17a904. abstract
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Salovich N W; Kim H; Ghosh A K; Giannetta R W; Kwok W; Welp U; Shen B; Zhu S; Wen H H; Tanatar M A; Prozorov R . 2013. Effect of heavy-ion irradiation on superconductivity in Ba0.6K0.4Fe2As2. Physical Review B. 87:180502. abstract
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Blomberg E C; Tanatar M A; Fernandes R M; Mazin I I; Shen B; Wen H H; Johannes M D; Schmalian J; Prozorov R . 2013. Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides. Nature Communications. 4:1914. abstract
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Liu J; Smetana V; Gschneidner K A; Miller G J; Pecharsky V K . 2013. The crystal structure and magnetic properties of Pr117Co56.7Ge112. Journal of Applied Physics. 113:17e120. abstract
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