Complex States, Emergent Phenomena & Superconductivity in Intermetallic & Metal-like Compounds
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)
Novikov V V; Avdashchenko D V; Bud'ko S L; Mitroshenkov N V; Matovnikov A V; Kim H; Tanatar M A; Prozorov R . 2013. Spin glass and glass-like lattice behaviour in HoB66 at low temperatures. Philosophical Magazine. 93:1110-1123.
Yeninas S; Tanatar M A; Murphy J; Strehlow C P; Ayala-Valenzuela O E; McDonald R D; Welp U; Kwok W K; Kobayashi T; Miyasaka S; Tajima S; Prozorov R . 2013. Upper critical field of isoelectron substituted SrFe2(As1-xPx)(2). Physical Review B. 87:094503.
Goetsch R J; Anand V K; Johnston D C . 2013. Antiferromagnetism in EuNiGe3. Physical Review B. 87:064406.
Bermudez M M; Pasquini G; Bud'ko S L; Canfield P C . 2013. Correlated vortex pinning in slightly orthorhombic twinned Ba(Fe1-xCox)(2)As-2 single crystals: Possible shift of the vortex-glass/liquid transition. Physical Review B. 87:054515.
Moon S J; Schafgans A A; Tanatar M A; Prozorov R; Thaler A; Canfield P C; Sefat A S; Mandrus D; Basov D N . 2013. Interlayer Coherence and Superconducting Condensate in the c-Axis Response of Optimally Doped Ba(Fe1-xCox)(2)As-2 High-T-c Superconductor Using Infrared Spectroscopy. Physical Review Letters. 110:097003.
Mun E D; Bud'ko S L; Martin C; Kim H; Tanatar M A; Park J H; Murphy T; Schmiedeshoff G M; Dilley N; Prozorov R; Canfield P C . 2013. Magnetic-field-tuned quantum criticality of the heavy-fermion system YbPtBi. Physical Review B. 87:075120.
Ni N; Straszheim W E; Williams D J; Tanatar M A; Prozorov R; Bauer E D; Ronning F; Thompson J D; Cava R J . 2013. Transport and thermodynamic properties of (Ca1-xLax)(10)(Pt3As8)(Fe2As2)(5) superconductors. Physical Review B. 87:060507.
Hodovanets H; Thaler A; Mun E; Ni N; Bud'ko S L; Canfield P C . 2013. Thermoelectric power of Ba(Fe1-x Co (x) )(2)As-2 (0x0.05) and Ba(Fe1-x Rh (x) )(2)As-2 (0x0.171). Philosophical Magazine. 93:661-672.
Dhaka R S; Hahn S E; Razzoli E; Jiang R; Shi M; Harmon B N; Thaler A; Bud'ko S L; Canfield P C; Kaminski A . 2013. Unusual Temperature Dependence of Band Dispersion in Ba(Fe1-xRux)(2)As-2 and its Consequences for Antiferromagnetic Ordering. Physical Review Letters. 110:067002.