Possible Demonstration of a Polaronic Bose-Einstein(-Mott) Condensate in UO2(+x) by Ultrafast THz Spectroscopy and Microwave Dissipation

Conradson, Steven D.; Gilbertson, Steven M.; Daifuku, Stephanie L.; Kehl, Jeffrey A.; Durakiewicz, Tomasz; Andersson, David A.; Bishop, Alan R.; Byler, Darrin D.; Maldonado, Pablo; Oppeneer, Peter M.; Valdez, James A.; Neidig, Michael L.; Rodriguez, George

doi:10.1038/srep15278

Title: Possible Demonstration of a Polaronic Bose-Einstein(-Mott) Condensate in UO_2(+x) by Ultrafast THz Spectroscopy and Microwave Dissipation

Journal Article · Fri Oct 16 00:00:00 EDT 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep15278· OSTI ID:1236043

Conradson, Steven D. ^[1]; Gilbertson, Steven M. ^[2]; Daifuku, Stephanie L. ^[3]; Kehl, Jeffrey A. ^[3]; Durakiewicz, Tomasz ^[2]; Andersson, David A. ^[2]; Bishop, Alan R. ^[2]; Byler, Darrin D. ^[2]; Maldonado, Pablo ^[4]; Oppeneer, Peter M. ^[4]; Valdez, James A. ^[2]; Neidig, Michael L. ^[3]; Rodriguez, George ^[2]

Synchrotron Soleil (France)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Rochester, NY (United States)
Uppsala Univ. (Sweden)

Bose-Einstein condensates (BECs) composed of polarons would be an advance because they would combine coherently charge, spin, and a crystal lattice. Following our earlier report of unique structural and spectroscopic properties, we now identify potentially definitive evidence for polaronic BECs in photo- and chemically doped UO_2(+x) on the basis of exceptional coherence in the ultrafast time dependent terahertz absorption and microwave spectroscopy results that show collective behavior including dissipation patterns whose precedents are condensate vortex and defect disorder and condensate excitations. Furthermore, that some of these signatures of coherence in an atom-based system extend to ambient temperature suggests a novel mechanism that could be a synchronized, dynamical, disproportionation excitation, possibly via the solid state analog of a Feshbach resonance that promotes the coherence. Such a mechanism would demonstrate that the use of ultra-low temperatures to establish the BEC energy distribution is a convenience rather than a necessity, with the actual requirement for the particles being in the same state that is not necessarily the ground state attainable by other means. Interestingly, a macroscopic quantum object created by chemical doping that can persist to ambient temperature and resides in a bulk solid would be revolutionary in a number of scientific and technological fields.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1236043

Report Number(s):: LA-UR-15-27701; srep15278

Journal Information:: Scientific Reports, Vol. 5; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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