Yokoyama Lab. Ibaraki University

Recent Research

A new approach to gain deeper insight into quantum critical phenomena hidden within superconductors has been developed.

Disentangling anomalous electronic states near unconventional superconductivity

Antiferromagnetic order continuously emerges within the superconducting phase:

Antiferromagnetic quantum critical point tracks the suppressed superconducting upper critical field:

Relationship between quantum criticality and anomalous spin fluctuations in CeCoIn₅: a research project in JAEA:

Emergence of magnetic quantum critical point in superconductivity and its coupling with superconducting pairing electons.

Itinerant-localized duality and electronic correlations in a quantum ferromagnet: a research project in JAEA:

The quest for the origin of quantum criticality in unconventional superconductor CeCoIn₅:

Nanoscale electronic heterogeneity revealed in the exotic superconductor CeCo(In,Zn)₅: a research project in JAEA:

An anomalous ordered state in a quasi-kagome compound: participation in a research project in IMR, Tohoku Univ:

Emergence of the cluster-glass state as ferromagnetic quantum criticality is avoided in itinerant ferromagnet:

The role of anisotorpic quantum critical fluctuations in anomalous superconductivity:

Zn-doped CeCoIn₅: coupling between antiferromagnetic order and quantum critical fluctuations is unveiled:

Itinerant-localized duality of d electrons in ferromagnetic Sr_1-xLa_xRuO₃ studied by photoemission spectroscopy:

Effect of oxygen isotope doping in ferromagnetic SrRuO₃: participation in a research project in AIST:

Finding of non-Fermi-liquid behavior at zero magnetic field in Ni-doped heavy fermion superconductor CeCoIn₅:

Dynamics of heterogeneous magnetic state in Sr_1-xLa_xRuO₃ revealed by muon spin relaxation measurements:

Zn-doped CeCoIn₅: Antiferromagnetic correlation protects superconductivity against magnetic field:

Magnetic fluctuations coupled with itinerant-localized duality of d electrons found in ferromagnetic compound Sr_1-xLa_xRuO₃:

Emergence of antiferromagnetic order in heavy fermion superconductor CeCo(In_1-xZn_x)₅: