Quantum oscillations with magnetic hysteresis observed in CeTe3 thin films

Watanabe, Mori; Lee, Sang‐Hyun; Asano, Tsunaki; Ibe, Takashi; Tokuda, Masashi; Taniguchi, Hiroki; Ueta, Daichi; Okada, Yoshinori; Kobayashi, Kensuke; Niimi, Yasuhiro

doi:10.1063/5.0007517

Cited by 12 publications

(1 citation statement)

References 42 publications

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“…Compared with materials in existing studies such as YbRh2Si2, YbNi4P2, and CeT2Al10 (T = Ru, Os) 39 ,40 , 41 ,42 ,43 , 44 ,45 the intrinsically cleavable nature and simple composite structure of our vdW material offers an excellent platform for unveiling rich quasiparticle band deformation using surface sensitive spectroscopies with changing external magnetic field, its orientation and temperature. In addition, inherent applicability of advanced exfoliation techniques 46 will further enrich future challenges in searching for novel quantum phenomena.…”

Section: Discussionmentioning

confidence: 99%

Fermionic order by disorder in a van der Waals antiferromagnet

Okuma

Ueta

Kuniyoshi

et al. 2020

Sci Rep

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CeTe3 is a unique platform to investigate the itinerant magnetism in a van der Waals (vdW) coupled metal. Despite chemical pressure being a promising route to boost quantum fluctuation in this system, a systematic study on the chemical pressure effect on Ce3+(4f1) states is absent. Here, we report on the successful growth of a series of Se doped single crystals of CeTe3. We found a fluctuation driven exotic magnetic rotation from the usual easy-axis ordering to an unusual hard-axis ordering. Unlike in localized magnetic systems, near-critical magnetism can increase itinerancy hand-in-hand with enhancing fluctuation of magnetism. Thus, seemingly unstable hard-axis ordering emerges through kinetic energy gain, with the self-consistent observation of enhanced magnetic fluctuation (disorder). As far as we recognize, this order-by-disorder process in fermionic system is observed for the first time within vdW materials. Our finding opens a unique experimental platform for direct visualization of the rich quasiparticle Fermi surface deformation associated with the Fermionic order-by-disorder process. Also, the search for emergent exotic phases by further tuning of quantum fluctuation is suggested as a promising future challenge.

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Section: Discussionmentioning

confidence: 99%

Fermionic order by disorder in a van der Waals antiferromagnet

Okuma

Ueta

Kuniyoshi

et al. 2020

Sci Rep

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The phononic and charge density wave behavior of entire rare-earth tritelluride series with chemical pressure and temperature

et al. 2022

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Here, we present comprehensive phononic and charge density wave properties (CDW) of rare-earth van der Waals tritellurides through temperature dependent angle-resolved Raman spectroscopy measurements. All the possible rare-earth tritellurides (RTe3) ranging from R = La–Nd, Sm, Gd–Tm were synthesized through a chemical vapor transport technique to achieve high quality crystals with excellent CDW characteristics. Raman spectroscopy studies successfully identify the emergence of the CDW state and transition temperature (TCDW), which offers a non-destructive method to identify their CDW response with micron spatial resolution. Temperature dependent Raman measurements further correlate how the atomic mass of metal cations and the resulting chemical pressure influence its CDW properties and offer detailed insight into the strength of CDW amplitude mode-phonon coupling during the CDW transition. Angle-resolved Raman measurements offer the first insights into the CDW-phonon symmetry interplay by monitoring the change in the symmetry of phonon mode across the CDW transition. Overall results introduce the library of RTe3 CDW materials and establish their characteristics through the non-destructive angle-resolved Raman spectroscopy technique.

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Shubnikov-de-Haas oscillation and possible modification of effective mass in CeTe3 thin films

et al. 2021

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Magnetoresistance measurements have been performed in CeTe3 thin film devices in a temperature range from 2.1 to 20 K up to 8 T. A clear Shubnikov-de-Haas oscillation was observed in the whole temperature range. The temperature dependence of the oscillation amplitude was found to deviate from the Lifshitz–Kosevich formula below the magnetic transition temperature at TN1 ≈ 3 K. This indicates a significant interplay between the magnetic ordering and the conduction electrons, which could lead to a modification of the effective cyclotron mass. By analyzing the temperature dependence of the oscillation amplitude, we have estimated the effective mass, quantum lifetime and quantum mobility of the material both in the paramagnetic and antiferromagnetic states.

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Quantum oscillations with magnetic hysteresis observed in CeTe3 thin films

Cited by 12 publications

References 42 publications

Fermionic order by disorder in a van der Waals antiferromagnet

Fermionic order by disorder in a van der Waals antiferromagnet

The phononic and charge density wave behavior of entire rare-earth tritelluride series with chemical pressure and temperature

Shubnikov-de-Haas oscillation and possible modification of effective mass in CeTe3 thin films

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