Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations

Shrestha, K.; Chapai, R.; Pokharel, Bal K.; Miertschin, D.; Nguyen, T.; Zhou, X.; Chung, D. Y.; Kanatzidis, M. G.; Mitchell, J. F.; Welp, U.; Popović, Dragana; Graf, D. E.; Lorenz, B.; Kwok, W. K.

doi:10.1103/physrevb.105.024508

Title: Nontrivial Fermi surface topology of the kagome superconductor CsV₃Sb₅ probed by de Haas–van Alphen oscillations

Abstract

Here, we have investigated the normal state Fermi-surface properties of the kagome superconductor CsV₃Sb₅ using torque magnetometry with applied fields (H) up to 35 T. The torque signal shows clear de Haas-van Alphen (dHvA) oscillations above 15 T. The oscillations are smooth and consist of seven distinct frequencies with values from similar to ~18 T to 2135 T. The presence of higher frequencies in CsV₃Sb₅ is further confirmed by carrying out additional measurements using the tunnel diode oscillator technique. All frequencies measured at different tilt angles (θ) of the field direction with respect to the c axis show a 1/cosθ dependence, implying that the Fermi surfaces corresponding to these frequencies are two dimensional (2D). The absence of dHvA oscillations at θ = 90° further supports the presence of 2D Fermi surfaces. The Berry phase (φ) determined from the Landau level fan diagram for all frequencies is similar to ~ 0.4. This value is close to the theoretical value of φ = 0.5 for a nontrivial system, which strongly supports the nontrivial topology of the Fermi surfaces of these frequencies. Several quantities characterizing the Fermi surface are calculated employing the Lifshitz-Kosevich theory. These findings are crucial for exploring the interplay betweenmore »« less

Authors:

Shrestha, K. ^[1];

^[2];

^[3]; Miertschin, D. ^[1]; Nguyen, T. ^[1]; Zhou, X. ^[2];

^[2]; Kanatzidis, M. G. ^[4];

^[2]; Welp, U. ^[2];

^[3]; Graf, D. E. ^[3]; Lorenz, B. ^[5];

^[2]

West Texas A&M Univ., Canyon, TX (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)
Florida State Univ., Tallahassee, FL (United States); National High Magnetic Field Laboratory, Tallahassee, FL (United States)
Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern Univ., Evanston, IL (United States)
Univ. of Houston, TX (United States)

Publication Date:: Mon Jan 10 00:00:00 EST 2022

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Welch Foundation; National Science Foundation (NSF)

OSTI Identifier:: 1869178

Grant/Contract Number:: AC02-06CH11357; AE-0025; DMR-1644779; DMR-1707785

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B

Additional Journal Information:: Journal Volume: 105; Journal Issue: 2; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Fermi surface; Landau levels; topological materials

Citation Formats


                    Shrestha, K., Chapai, R., Pokharel, Bal K., Miertschin, D., Nguyen, T., Zhou, X., Chung, D. Y., Kanatzidis, M. G., Mitchell, J. F., Welp, U., Popović, Dragana, Graf, D. E., Lorenz, B., and Kwok, W. K. Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations.  United States: N. p., 2022. 
Web.  doi:10.1103/physrevb.105.024508.

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                    Shrestha, K., Chapai, R., Pokharel, Bal K., Miertschin, D., Nguyen, T., Zhou, X., Chung, D. Y., Kanatzidis, M. G., Mitchell, J. F., Welp, U., Popović, Dragana, Graf, D. E., Lorenz, B., & Kwok, W. K. Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations.  United States.  https://doi.org/10.1103/physrevb.105.024508

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                    Shrestha, K., Chapai, R., Pokharel, Bal K., Miertschin, D., Nguyen, T., Zhou, X., Chung, D. Y., Kanatzidis, M. G., Mitchell, J. F., Welp, U., Popović, Dragana, Graf, D. E., Lorenz, B., and Kwok, W. K. Mon .  
"Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations".  United States.  https://doi.org/10.1103/physrevb.105.024508.  https://www.osti.gov/servlets/purl/1869178.

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@article{osti_1869178,

  title        = {Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations},

  author       = {Shrestha, K. and Chapai, R. and Pokharel, Bal K. and Miertschin, D. and Nguyen, T. and Zhou, X. and Chung, D. Y. and Kanatzidis, M. G. and Mitchell, J. F. and Welp, U. and Popović, Dragana and Graf, D. E. and Lorenz, B. and Kwok, W. K.},

  abstractNote = {Here, we have investigated the normal state Fermi-surface properties of the kagome superconductor CsV3Sb5 using torque magnetometry with applied fields (H) up to 35 T. The torque signal shows clear de Haas-van Alphen (dHvA) oscillations above 15 T. The oscillations are smooth and consist of seven distinct frequencies with values from similar to ~18 T to 2135 T. The presence of higher frequencies in CsV3Sb5 is further confirmed by carrying out additional measurements using the tunnel diode oscillator technique. All frequencies measured at different tilt angles (θ) of the field direction with respect to the c axis show a 1/cosθ dependence, implying that the Fermi surfaces corresponding to these frequencies are two dimensional (2D). The absence of dHvA oscillations at θ = 90° further supports the presence of 2D Fermi surfaces. The Berry phase (φ) determined from the Landau level fan diagram for all frequencies is similar to ~ 0.4. This value is close to the theoretical value of φ = 0.5 for a nontrivial system, which strongly supports the nontrivial topology of the Fermi surfaces of these frequencies. Several quantities characterizing the Fermi surface are calculated employing the Lifshitz-Kosevich theory. These findings are crucial for exploring the interplay between nontrivial band topology, charge-density wave, and unconventional superconductivity of CsV3Sb5.},

  doi          = {10.1103/physrevb.105.024508},

  journal      = {Physical Review. B},

  number       = 2,

  volume       = 105,

  place        = {United States},

  year         = {Mon Jan 10 00:00:00 EST 2022},

  month        = {Mon Jan 10 00:00:00 EST 2022}

}

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Title: Nontrivial Fermi surface topology of the kagome superconductor CsV3Sb5 probed by de Haas–van Alphen oscillations

Abstract

Citation Formats

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Title: Nontrivial Fermi surface topology of the kagome superconductor CsV₃Sb₅ probed by de Haas–van Alphen oscillations

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