2011年7月
Antiferromagnetic Phases in the Fulde-Ferrell-Larkin-Ovchinnikov State of CeCoIn5
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- 巻
- 80
- 号
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJS.80SA.SA005
- 出版者・発行元
- PHYSICAL SOC JAPAN
The antiferromagnetic (AFM) order in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state is analyzed on the basis of a Ginzburg-Landau theory. To examine the possible AFM-FFLO state in CeCoIn5, we focus on the incommensurate AFM order characterized by the wave vector (Q) over right arrow = (Q) over right arrow (0) +/- (q) over right arrow (inc) with (Q) over right arrow (0) = (pi, pi, pi) and (q) over right arrow (inc) parallel to [110] or [1 (1) over bar0] in the tetragonal crystal structure. We formulate the two component Ginzburg-Landau theory and investigate the two degenerate incommensurate AFM order with (q) over right arrow (inc) parallel to [110] and [1 (1) over bar0]. We show that the pinning of AFM moment due to the FFLO nodal planes leads to multiple phases in magnetic fields along [100] or [010]. The phase diagrams for various coupling constants between the two order parameters are shown for the comparison with CeCoIn5. Experimental results of NMR and neutron scattering measurements are discussed.
- リンク情報
- ID情報
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- DOI : 10.1143/JPSJS.80SA.SA005
- ISSN : 0031-9015
- Web of Science ID : WOS:000208728400005