Research Project
Grant-in-Aid for Young Scientists (A)
In iron-based superconductors, spin and orbital degrees of freedom play an important role. An important task in the community is thus to uncover the unusual normal state properties related to the spin/orbital degrees of freedom. In this work, we have focused on the studies of quantum critical point (QCP) hidden beneath the superconducting dome as well as the electronic nematic transition above there. Our studies based on clean single crystals of BaFe2(As1-xPx)2 show the first evidence for the QCP beneath the superconducting dome, as well as the nematic transition in the normal state. These findings provide important clues for the understanding of iron-based superconductors. In the last year of this project, we have also investigated anomalous electronic properties and quantum condensate in iron-chalchogenides. In newly developed single crystals of FeSe, a cross-over from weakly coupled BCS state to tightly bound BEC state, as well as a possible new high-field phase have been found.
All 2015 2014 2013 2012 Other
All Journal Article (18 results) (of which Peer Reviewed: 18 results, Open Access: 5 results, Acknowledgement Compliant: 3 results) Presentation (68 results) (of which Invited: 4 results) Remarks (1 results)
Proceedings of the National Academy of Sciences of the United States of America
Volume: 111 Issue: 46 Pages: 16309-16313
10.1073/pnas.1413477111
Physical Review B
Volume: 90 Issue: 14 Pages: 144517-144517
10.1103/physrevb.90.144517
Nat. Commun.
Volume: 5 Issue: 1 Pages: 4188-4188
10.1038/ncomms5188
Phys. Rev. B
Volume: 90 Issue: 1 Pages: 014503-014503
10.1103/physrevb.90.014503
Volume: 5 Issue: 1 Pages: 5657-5657
10.1038/ncomms6657
Sci. Rep.
Volume: 4 Issue: 1 Pages: 7292-7292
10.1038/srep07292
Volume: 5 Issue: 1 Pages: 5679-5679
10.1038/ncomms6679
Phys Rev. B
Volume: 89 Issue: 4 Pages: 045101-045101
10.1103/physrevb.89.045101
Physieal Review B
Volume: 89 Issue: 11 Pages: 115112-115112
10.1103/physrevb.89.115112
Volume: 87 Issue: 17 Pages: 174507-174507
10.1103/physrevb.87.174507
Physical Review Letter
Volume: 109 Issue: 25 Pages: 257002-257002
10.1103/physrevlett.110.257002
Volume: 87 Issue: 10 Pages: 104506-104506
10.1103/physrevb.87.104506
Volume: 87 Issue: 9 Pages: 94506-94506
10.1103/physrevb.87.094506
Volume: 85 Issue: 18 Pages: 184505-184505
10.1103/physrevb.85.184505
Nature
Volume: 486 Issue: 7403 Pages: 382-385
10.1038/nature11178
Science
Volume: 336 Issue: 6088 Pages: 1554-1557
10.1126/science.1219821
Phys. Rev. Lett
Volume: 109
Volume: 86 Issue: 9 Pages: 94521-94521
10.1103/physrevb.86.094521
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