Three-dimensional quasiquantized Hall insulator phase in SrSi2

Manna K, Kumar N, Chattopadhyay S, Noky J, Yao M, Park J, Foerster T, Uhlarz M, Chakraborty T, Schwarze BV, Hornung J, Strocov VN, Borrmann H, Shekhar C, Sun Y, Bose SN, Wosnitza J, Felser C, Gooth J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review B American Physical Society

Book Volume: 106

Article Number: L041113

Journal Issue: 4

DOI: 10.1103/PhysRevB.106.L041113

Abstract

In insulators, the longitudinal resistivity becomes infinitely large at zero temperature. For classical insulators, the Hall conductivity becomes zero at the same time. However, there are special systems, such as two-dimensional quantum Hall insulators, in which a more complex scenario is observed at high magnetic fields. Here, we report experimental evidence for a quasiquantized Hall insulator in the quantum limit of the three-dimensional compound SrSi2. Our measurements reveal a magnetic-field range, in which the longitudinal resistivity diverges with decreasing temperature, while the Hall conductivity approaches a quasiquantized value that is given only by the conductance quantum and the Fermi wave vector in the field direction. The quasiquantized Hall insulator appears in a magnetic field induced insulating ground state of three-dimensional materials and is deeply rooted in quantum Hall physics.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE) Indian Institute of Technology (IIT), Delhi IN India (IN) Paul Scherrer Institute (PSI) CH Switzerland (CH)

How to cite

APA:

Manna, K., Kumar, N., Chattopadhyay, S., Noky, J., Yao, M., Park, J.,... Gooth, J. (2022). Three-dimensional quasiquantized Hall insulator phase in SrSi2. Physical Review B, 106(4). https://doi.org/10.1103/PhysRevB.106.L041113

MLA:

Manna, Kaustuv, et al. "Three-dimensional quasiquantized Hall insulator phase in SrSi2." Physical Review B 106.4 (2022).

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