• Letter

Closing the hybridization charge gap in the Kondo semiconductor SmB6 with an ultrahigh magnetic field

Daisuke Nakamura, Atsushi Miyake, Akihiko Ikeda, Masashi Tokunaga, Fumitoshi Iga, and Yasuhiro H. Matsuda
Phys. Rev. B 105, L241105 – Published 6 June 2022
PDFHTMLExport Citation

Abstract

We have investigated the high-frequency magnetoresistance of Kondo semiconductor SmB6 under ultrahigh magnetic fields generated by the electromagnetic flux-compression technique. The semiconductor-metal transition due to closing of the hybridization charge gap was observed at approximately 180 T. The critical magnetic field observed is substantially higher than that reported previously. At temperatures below around 10 K, another transition was observed at a lower field (approximately 80 T). We suggest that the observed 80-T transition relates with the energy scale of quasiparticles such as the spin polaron in the in-gap state.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 9 August 2021
  • Revised 10 May 2022
  • Accepted 16 May 2022

DOI:https://doi.org/10.1103/PhysRevB.105.L241105

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Daisuke Nakamura1,2,*, Atsushi Miyake1, Akihiko Ikeda1,3, Masashi Tokunaga1, Fumitoshi Iga4, and Yasuhiro H. Matsuda1,†

  • 1The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
  • 2RIKEN Center for Emergent Matter Science (CEMS), Hirosawa, Wako, Saitama 351-0198, Japan
  • 3Department of Engineering Science, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
  • 4Institute of Quantum Beam Science, Ibaraki University, Mito, Ibaraki 310-8512, Japan

  • *daisuke.nakamura.rg@riken.jp
  • ymatsuda@issp.u-tokyo.ac.jp

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 105, Iss. 24 — 15 June 2022

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×