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Kuroda K, Arai Y, Rezaei N, Kunisada S, Sakuragi S, Alaei M, Kinoshita Y, Bareille C, Noguchi R, Nakayama M, Akebi S, Sakano M, Kawaguchi K, Arita M, Ideta S, Tanaka K, Kitazawa H, Okazaki K, Tokunaga M, Haga Y, Shin S, Suzuki HS, Arita R, Kondo T. Devil's staircase transition of the electronic structures in CeSb. Nat Commun 2020; 11:2888. [PMID: 32514054 PMCID: PMC7280508 DOI: 10.1038/s41467-020-16707-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 05/15/2020] [Indexed: 12/02/2022] Open
Abstract
Solids with competing interactions often undergo complex phase transitions with a variety of long-periodic modulations. Among such transition, devil's staircase is the most complex phenomenon, and for it, CeSb is the most famous material, where a number of the distinct phases with long-periodic magnetostructures sequentially appear below the Néel temperature. An evolution of the low-energy electronic structure going through the devil's staircase is of special interest, which has, however, been elusive so far despite 40 years of intense research. Here, we use bulk-sensitive angle-resolved photoemission spectroscopy and reveal the devil's staircase transition of the electronic structures. The magnetic reconstruction dramatically alters the band dispersions at each transition. Moreover, we find that the well-defined band picture largely collapses around the Fermi energy under the long-periodic modulation of the transitional phase, while it recovers at the transition into the lowest-temperature ground state. Our data provide the first direct evidence for a significant reorganization of the electronic structures and spectral functions occurring during the devil's staircase.
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Affiliation(s)
- Kenta Kuroda
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
| | - Y Arai
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - N Rezaei
- Department of Physics, Isfahan University of Technology, 84156-83111, Isfahan, Iran
| | - S Kunisada
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - S Sakuragi
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - M Alaei
- Department of Physics, Isfahan University of Technology, 84156-83111, Isfahan, Iran
| | - Y Kinoshita
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - C Bareille
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - R Noguchi
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - M Nakayama
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - S Akebi
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - M Sakano
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
- Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - K Kawaguchi
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - M Arita
- Hiroshima Synchrotron Center, Hiroshima University, Higashi-Hiroshima, 739-0046, Japan
| | - S Ideta
- UVSOR Facility, Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - K Tanaka
- UVSOR Facility, Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - H Kitazawa
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, 305-0047, Japan
| | - K Okazaki
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - M Tokunaga
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - Y Haga
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
| | - S Shin
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - H S Suzuki
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
| | - R Arita
- Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Takeshi Kondo
- ISSP, University of Tokyo, Kashiwa, Chiba, 277-8581, Japan
- Trans-scale Quantum Science Institute, University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan
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Jang S, Kealhofer R, John C, Doyle S, Hong JS, Shim JH, Si Q, Erten O, Denlinger JD, Analytis JG. Direct visualization of coexisting channels of interaction in CeSb. SCIENCE ADVANCES 2019; 5:eaat7158. [PMID: 30838325 PMCID: PMC6397026 DOI: 10.1126/sciadv.aat7158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
Our understanding of correlated electron systems is vexed by the complexity of their interactions. Heavy fermion compounds are archetypal examples of this physics, leading to exotic properties that weave magnetism, superconductivity and strange metal behavior together. The Kondo semimetal CeSb is an unusual example where different channels of interaction not only coexist, but have coincident physical signatures, leading to decades of debate about the microscopic picture describing the interactions between the f moments and the itinerant electron sea. Using angle-resolved photoemission spectroscopy, we resonantly enhance the response of the Ce f electrons across the magnetic transitions of CeSb and find there are two distinct modes of interaction that are simultaneously active, but on different kinds of carriers. This study reveals how correlated systems can reconcile the coexistence of different modes on interaction-by separating their action in momentum space, they allow their coexistence in real space.
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Affiliation(s)
- Sooyoung Jang
- Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Robert Kealhofer
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Caolan John
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Spencer Doyle
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Ji-Sook Hong
- Department of Chemistry and Division of Advanced Nuclear Engineering, POSTECH, Pohang 37673, Korea
| | - Ji Hoon Shim
- Department of Chemistry and Division of Advanced Nuclear Engineering, POSTECH, Pohang 37673, Korea
| | - Q. Si
- Department of Physics and Astronomy, Rice University, Houston, TX 77005, USA
| | - O. Erten
- Department of Physics, Arizona State University, Tempe, AZ 85281, USA
| | | | - James. G. Analytis
- Department of Physics, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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