Microscopic aspects of electronic inhomogeneity and anisotropic spin fluctuations near antiferromagnetic quantum critical point

Sakai, Hironori   

Quantum criticalities tuned by pressure, external field, and chemical substitutions mark an important link in the heavy fermion superconductors. Systematic NMR investigations have suggested that -type antiferromagnetic spin fluctuations are favorable for -wave superconductivity in 115 compounds. Recently, anisotropy of antiferromagnetic spin fluctuations is now being microscopically examined in several other tetragonal systems like CeRhSi under pressures. Moreover, electrical inhomogeneity near quantum critical point is also detected in the chemically substituted CeCoIn.