Observation of a critical charge mode in a strange metal-Reference-Cited by-同舟云学术

Observation of a critical charge mode in a strange metal

Published:2023-03-03 Issue:6635 Volume:379 Page:908-912
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Kobayashi Hisao¹²^ORCID,Sakaguchi Yui¹,Kitagawa Hayato¹²^ORCID,Oura Momoko¹²,Ikeda Shugo¹²^ORCID,Kuga Kentaro³^ORCID,Suzuki Shintaro³^ORCID,Nakatsuji Satoru³⁴⁵⁶^ORCID,Masuda Ryo²⁷⁸^ORCID,Kobayashi Yasuhiro²⁷^ORCID,Seto Makoto²⁷^ORCID,Yoda Yoshitaka⁹,Tamasaku Kenji²^ORCID,Komijani Yashar¹⁰¹¹^ORCID,Chandra Premala¹¹^ORCID,Coleman Piers¹¹¹²^ORCID

Affiliation:

1. Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Hyogo 678-1297, Japan.

2. RIKEN SPring-8 Center, Hyogo 679-5148, Japan.

3. Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan.

4. Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.

5. Trans-scale Quantum Science Institute, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.

6. Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA.

7. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan.

8. Graduate School of Science and Technology, Hirosaki University, Aomori 036-8561 Japan.

9. Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan.

10. Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA.

11. Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08854, USA.

12. Hubbard Theory Consortium, Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK.

Abstract

Understanding the strange metallic behavior that develops at the brink of localization in quantum materials requires probing the underlying electronic charge dynamics. Using synchrotron radiation–based Mössbauer spectroscopy, we studied the charge fluctuations of the strange metal phase of β-YbAlB 4 as a function of temperature and pressure. We found that the usual single absorption peak in the Fermi-liquid regime splits into two peaks upon entering the critical regime. We interpret this spectrum as a single nuclear transition, modulated by nearby electronic valence fluctuations whose long time scales are further enhanced by the formation of charged polarons. These critical charge fluctuations may prove to be a distinct signature of strange metals.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Link

https://www.science.org/doi/pdf/10.1126/science.abc4787

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