TY - JOUR
T1 - Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy
AU - Sakata, Hideaki
AU - Nishida, Nobuhiko
AU - Hedo, Masato
AU - Sakurai, Kenji
AU - Inada, Yoshihiko
AU - Onuki, Yoshichika
AU - Yamamoto, Etsuji
AU - Haga, Yoshinori
PY - 2000/7
Y1 - 2000/7
N2 - Scanning tunneling microscopy (STM) and spectroscopy (STS) measurements have been performed on an intermetallic compound CeRu2 down to 2.2 K. Vacuum tunneling spectra have been measured on the surface prepared by cracking the sample in helium gas at 4.2 K. The shape and temperature dependence of the quasiparticle density of states, Ns(E, r), have been well interpreted in terms of s-wave BCS superconductors. In magnetic fields, the hexagonal vortex lattice has been imaged by measurements of NS(E = 0, r) up to 2 T. This is the first observation of the vortex lattice by STS in heavy-fermion superconductors.
AB - Scanning tunneling microscopy (STM) and spectroscopy (STS) measurements have been performed on an intermetallic compound CeRu2 down to 2.2 K. Vacuum tunneling spectra have been measured on the surface prepared by cracking the sample in helium gas at 4.2 K. The shape and temperature dependence of the quasiparticle density of states, Ns(E, r), have been well interpreted in terms of s-wave BCS superconductors. In magnetic fields, the hexagonal vortex lattice has been imaged by measurements of NS(E = 0, r) up to 2 T. This is the first observation of the vortex lattice by STS in heavy-fermion superconductors.
KW - CeRu
KW - Scanning tunneling microscopy
KW - Scanning tunneling spectroscopy
KW - Superconductor
KW - Vortex lattice
UR - http://www.scopus.com/inward/record.url?scp=0034408292&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034408292&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.69.1970
DO - 10.1143/JPSJ.69.1970
M3 - Article
AN - SCOPUS:0034408292
VL - 69
SP - 1970
EP - 1973
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 7
ER -