Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy

Hideaki Sakata, Nobuhiko Nishida, Masato Hedo, Kenji Sakurai, Yoshihiko Inada, Yoshichika Onuki, Etsuji Yamamoto, Yoshinori Haga

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1970-1973
Number of pages4
JournalJournal of the Physical Society of Japan
Volume69
Issue number7
Publication statusPublished - Jul 2000
Externally publishedYes

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vortices
heavy fermion superconductors
scanning
spectroscopy
intermetallics
scanning tunneling microscopy
helium
vacuum
temperature dependence
gases
magnetic fields

Keywords

  • CeRu
  • Scanning tunneling microscopy
  • Scanning tunneling spectroscopy
  • Superconductor
  • Vortex lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Sakata, H., Nishida, N., Hedo, M., Sakurai, K., Inada, Y., Onuki, Y., ... Haga, Y. (2000). Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy. Journal of the Physical Society of Japan, 69(7), 1970-1973.

Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy. / Sakata, Hideaki; Nishida, Nobuhiko; Hedo, Masato; Sakurai, Kenji; Inada, Yoshihiko; Onuki, Yoshichika; Yamamoto, Etsuji; Haga, Yoshinori.

In: Journal of the Physical Society of Japan, Vol. 69, No. 7, 07.2000, p. 1970-1973.

Research output: Contribution to journalArticle

Sakata, H, Nishida, N, Hedo, M, Sakurai, K, Inada, Y, Onuki, Y, Yamamoto, E & Haga, Y 2000, 'Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy', Journal of the Physical Society of Japan, vol. 69, no. 7, pp. 1970-1973.
Sakata, Hideaki ; Nishida, Nobuhiko ; Hedo, Masato ; Sakurai, Kenji ; Inada, Yoshihiko ; Onuki, Yoshichika ; Yamamoto, Etsuji ; Haga, Yoshinori. / Vortex Lattice and Quasiparticle Density of States in CeRu2 Studied by Scanning Tunneling Spectroscopy. In: Journal of the Physical Society of Japan. 2000 ; Vol. 69, No. 7. pp. 1970-1973.
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