TY - JOUR
T1 - Superconducting vortices in CeCoIn5
T2 - Toward the Pauli-limiting field
AU - Bianchi, Andrea D.
AU - Kenzelmann, Michel
AU - DeBeer-Schmitt, Lisa
AU - White, Jon S.
AU - Forgan, Edward M.
AU - Mesot, Joel
AU - Zolliker, Markus
AU - Kohlbrecher, Joachim
AU - Movshovich, Roman
AU - Bauer, Eric D.
AU - Sarrao, John L.
AU - Fisk, Zachary
AU - Petrović, Cedomir
AU - Eskildsen, Morten Ring
PY - 2008/1/11
Y1 - 2008/1/11
N2 - Many superconducting materials allow the penetration of magnetic fields in a mixed state in which the superfluid is threaded by a regular lattice of Abrikosov vortices, each carrying one quantum of magnetic flux. The phenomenological Ginzburg-Landau theory, based on the concept of characteristic length scales, has generally provided a good description of the Abrikosov vortex lattice state. We conducted neutron-scattering measurements of the vortex lattice form factor in the heavy-fermion superconductor cerium-cobalt-indium (CeCoIn5) and found that this form factor increases with increasing field - opposite to the expectations within the Abrikosov-Ginzburg-Landau paradigm. We propose that the anomalous field dependence of the form factor arises from Pauli paramagnetic effects around the vortex cores and from the proximity of the superconducting state to a quantum critical point.
AB - Many superconducting materials allow the penetration of magnetic fields in a mixed state in which the superfluid is threaded by a regular lattice of Abrikosov vortices, each carrying one quantum of magnetic flux. The phenomenological Ginzburg-Landau theory, based on the concept of characteristic length scales, has generally provided a good description of the Abrikosov vortex lattice state. We conducted neutron-scattering measurements of the vortex lattice form factor in the heavy-fermion superconductor cerium-cobalt-indium (CeCoIn5) and found that this form factor increases with increasing field - opposite to the expectations within the Abrikosov-Ginzburg-Landau paradigm. We propose that the anomalous field dependence of the form factor arises from Pauli paramagnetic effects around the vortex cores and from the proximity of the superconducting state to a quantum critical point.
UR - http://www.scopus.com/inward/record.url?scp=38149090932&partnerID=8YFLogxK
U2 - 10.1126/science.1150600
DO - 10.1126/science.1150600
M3 - Article
AN - SCOPUS:38149090932
SN - 0036-8075
VL - 319
SP - 177
EP - 180
JO - Science
JF - Science
IS - 5860
ER -