Structure and pressure dependence of the Fermi surface of lithium

ORAL

Abstract

There has been much interest in the phase diagram of lithium at both 1 atm and high pressure. We report first-principles calculations combined with Shubnikov–de Haas (SdH) oscillation measurements at 300 mK in external magnetic fields up to 35 T to map the Fermi surface of lithium. At 1 atm, our data reveal direct evidence for its spherical deformation. As the pressure increases, the deformation increases, but the Fermi surface remains mostly spherical up to 4.7 GPa. Finally, our data indicate that the electron effective mass does not deviate significantly under compression from its ambient pressure value.

*Theoretical work supported by KFUPM, Deanship of Scientific Research through Project No. SR211002 and NSERC Grant No. RGPIN-2017-03931. Experimental work supported by NSF/DMR Awards No. 13519862, 2132692, and 1157490/1644779; U.S. DOE No. DE-SC0020340 and DENA0001979. Work at LLNL performed under the auspices of the U.S. DOE, Contract No. DE-AC52-07NA27344.

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Publication: Tushar Bhowmick, Sabri F. Elatresh, Audrey D. Grockowiak, William Coniglio, Mohammad Tomal Hossain, Elisabeth J. Nicol, Stanley W. Tozer, Stanimir A. Bonev, and Shanti Deemyad, Phys. Rev. B 106, L041112 (2022).

Presenters

  • Sabri Elatresh

    • Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

Authors

  • Sabri Elatresh

    • Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

  • Tushar Bhowmick

    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

  • Audrey D Grockowiak

    • National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32310, USA

  • William A Coniglio

    • National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32310, USA

  • Mohammad Hossain

    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

  • Elisabeth J Nicol

    • Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1

  • Stanley W Tozer

    • National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32310, USA

  • Shanti Deemyad

    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA