Emergent antiferromagnetism in a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>d</mml:mi></mml:mrow></mml:math>-wave superconductor with strong paramagnetic pair-breaking
説明
It is theoretically shown that, in the four-fold symmetric d-wave superconducting phase, a paramagnetic pair-breaking (PPB) enhanced sufficiently by increasing the applied magnetic field induces not only the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state but also an incommensurate antiferromagnetic (AFM) order with Q-vector parallel to a gap node. This AFM ordering tends to occur only below H_{c2} at low temperatures, i.e., in the presence of a nonvanishing superconducting energy gap $��$ rather than in the normal phase. Through a detailed study on the resulting AFM order and its interplay with the FFLO spatial modulation of $��$, it is argued that the strange high field and low temperature (HFLT) superconducting phase of CeCoIn_5 is a coexisting phase of the FFLO and incommensurate AFM orders, and that this PPB mechanism of an AFM ordering is also the origin of the AFM quantum critical fluctuation which has occurred close to H_{c2}(0) in several unconventional superconductors including CeCoIn_5.
22 pages, 12 figures.2 references and related comnments are added.Accepted for publication in Phys. Rev. B
収録刊行物
-
- Physical Review B
-
Physical Review B 83 (22), 2011-06-28
American Physical Society (APS)
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1360848659911096064
-
- ISSN
- 1550235X
- 10980121
-
- データソース種別
-
- Crossref
- KAKEN
- OpenAIRE