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Using Chemical Pressure to Tune the Electronic State in the Topological Metal Zr<sub>2</sub>Te<sub>2</sub>P

ORAL

Abstract


Zr2Te2P was recently introduced as a strong topological metal with multiple Dirac cones [1], but it remains an open question as to whether the bulk metallic states and topologically protected states together can produce novel behavior. To explore this, we examined the chemical substitution series Zr2(Te1-xSex)2P. A combination of XRD and EDS show that (1) the crystals form in the expected structure and (2) the unit cell volume is compressed as Te → Se. In order to follow the impact on the Fermi surface, electrical transport and torque magnetometry measurements were performed over a temperature range of 500mK–50K, in magnetic fields μ0 H<41T. These measurements reveal (1) a complex evolution of the Fermi surface topography and (2) that the effective masses for some branches decrease with increasing x. We will discuss these results and the prospects for understanding the interplay between conventional and topological states and for inducing other ordered states, such as superconductivity. [1] K.-W. Chen, et. al. PRB 97, 165112 (2018)

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Presenters

  • Oladehin Olatunde

    National High Magnetic Field Laboratory, Florida State University, Florida State University

Authors

  • Oladehin Olatunde

    National High Magnetic Field Laboratory, Florida State University, Florida State University

  • Ryan Baumbach

    National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Laboratory, Florida State University, Physics, NHMFL, Florida State University

  • David E Graf

    National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Lab, Florida State University, National High Magnetic Field Laboratory, Tallahassee and Florida State University, National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Laboratory (FSU), Department of Physics, Florida State University, National High Magnetic Field Laboratory and Department of Physics, Florida State University, National High Magnetic Field Lab, National High Magnetic Field Laboratory, Tallahassee, FL, CMS, National High Magnetic Laboratory

  • Kaya Wei

    National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Florida State University, CMS, National High Magnetic Laboratory, Florida State University

  • Jorge Galeano Cabral

    National High Magnetic Field Laboratory, Florida State University, Florida State University, FAMU-FSU College of Engineering, Florida State University