TY - JOUR
T1 - Spin resonance in three-Dimensional superconductors
T2 - The case of CeCoIn5
AU - Chubukov, A. V.
AU - Gor'Kov, L. P.
PY - 2008/10/3
Y1 - 2008/10/3
N2 - The recent observation of resonance spin excitation at (1/2, 1/2, 1/2) in the superconducting state of CeCoIn5 was interpreted as evidence for dx2-y2 gap symmetry, by analogy with cuprates. This is true if the resonance is a spin exciton. We argue that such a description is undermined by the three dimensionality of CeCoIn5. We show that in 3D systems the excitonic resonance only emerges at strong coupling, and is weak. We argue in favor of the alternative, magnon scenario, which does not require a dx2-y2 gap.
AB - The recent observation of resonance spin excitation at (1/2, 1/2, 1/2) in the superconducting state of CeCoIn5 was interpreted as evidence for dx2-y2 gap symmetry, by analogy with cuprates. This is true if the resonance is a spin exciton. We argue that such a description is undermined by the three dimensionality of CeCoIn5. We show that in 3D systems the excitonic resonance only emerges at strong coupling, and is weak. We argue in favor of the alternative, magnon scenario, which does not require a dx2-y2 gap.
UR - http://www.scopus.com/inward/record.url?scp=53549097610&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=53549097610&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.101.147004
DO - 10.1103/PhysRevLett.101.147004
M3 - Article
C2 - 18851562
AN - SCOPUS:53549097610
SN - 0031-9007
VL - 101
JO - Physical review letters
JF - Physical review letters
IS - 14
M1 - 147004
ER -