Coexistence of orbital and quantum critical magnetoresistance in
Abstract
The recent discovery of a nonmagnetic nematic quantum critical point (QCP) in the iron chalcogenide family FeSe1–xSx has raised the prospect of investigating, in isolation, the role of nematicity on the electronic properties of correlated metals. Here we report a detailed study of the normal state transverse magnetoresistance (MR) in FeSe1–xSx for a series of S concentrations spanning the nematic QCP. For all temperatures and x values studied, the MR can be decomposed into two distinct components: one that varies quadratically in magnetic field strength μ0H and one that follows precisely the quadrature scaling form recently reported in metals at or close to a QCP and characterized by a H-linear MR over an extended field range. The two components evolve systematically with both temperature and S substitution in a manner that is determined by their proximity to the nematic QCP. This study thus reveals the coexistence of two independent charge sectors in a quantum critical system. Moreover, the quantum critical component of the MR is found to be less sensitive to disorder than the quadratic (orbital) MR, suggesting that detection of the latter in previous MR studies of metals near a QCP may have been obscured.
- Authors:
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Novel Pathways to Quantum Coherence in Materials (NPQC); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Netherlands Organization for Scientific Research (NWO); Engineering and Physical Sciences Research Council (EPSRC); Japan Society for the Promotion of Science (JSPS); Gordon and Betty Moore Foundation
- OSTI Identifier:
- 1560897
- Alternate Identifier(s):
- OSTI ID: 1767793
- Grant/Contract Number:
- AC02-05CH11231; 16METL01; EP/L015544/1; JP15H02106; JP15H03688; JP15KK0160; JP18H01177; JP18H05227; JP19H00649; JP15H05852; JP19H05824; GBMF4374
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Research
- Additional Journal Information:
- Journal Name: Physical Review Research Journal Volume: 1 Journal Issue: 2; Journal ID: ISSN 2643-1564
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; optics; defects; charge transport; superconductivity; magnetism and spin physics; quantum information science
Citation Formats
Licciardello, S., Maksimovic, N., Ayres, J., Buhot, J., Čulo, M., Bryant, B., Kasahara, S., Matsuda, Y., Shibauchi, T., Nagarajan, V., Analytis, J. G., and Hussey, N. E. Coexistence of orbital and quantum critical magnetoresistance in FeSe 1 − x S x. United States: N. p., 2019.
Web. doi:10.1103/PhysRevResearch.1.023011.
Licciardello, S., Maksimovic, N., Ayres, J., Buhot, J., Čulo, M., Bryant, B., Kasahara, S., Matsuda, Y., Shibauchi, T., Nagarajan, V., Analytis, J. G., & Hussey, N. E. Coexistence of orbital and quantum critical magnetoresistance in FeSe 1 − x S x. United States. https://doi.org/10.1103/PhysRevResearch.1.023011
Licciardello, S., Maksimovic, N., Ayres, J., Buhot, J., Čulo, M., Bryant, B., Kasahara, S., Matsuda, Y., Shibauchi, T., Nagarajan, V., Analytis, J. G., and Hussey, N. E. Tue .
"Coexistence of orbital and quantum critical magnetoresistance in FeSe 1 − x S x". United States. https://doi.org/10.1103/PhysRevResearch.1.023011.
@article{osti_1560897,
title = {Coexistence of orbital and quantum critical magnetoresistance in FeSe 1 − x S x},
author = {Licciardello, S. and Maksimovic, N. and Ayres, J. and Buhot, J. and Čulo, M. and Bryant, B. and Kasahara, S. and Matsuda, Y. and Shibauchi, T. and Nagarajan, V. and Analytis, J. G. and Hussey, N. E.},
abstractNote = {The recent discovery of a nonmagnetic nematic quantum critical point (QCP) in the iron chalcogenide family FeSe1–xSx has raised the prospect of investigating, in isolation, the role of nematicity on the electronic properties of correlated metals. Here we report a detailed study of the normal state transverse magnetoresistance (MR) in FeSe1–xSx for a series of S concentrations spanning the nematic QCP. For all temperatures and x values studied, the MR can be decomposed into two distinct components: one that varies quadratically in magnetic field strength μ0H and one that follows precisely the quadrature scaling form recently reported in metals at or close to a QCP and characterized by a H-linear MR over an extended field range. The two components evolve systematically with both temperature and S substitution in a manner that is determined by their proximity to the nematic QCP. This study thus reveals the coexistence of two independent charge sectors in a quantum critical system. Moreover, the quantum critical component of the MR is found to be less sensitive to disorder than the quadratic (orbital) MR, suggesting that detection of the latter in previous MR studies of metals near a QCP may have been obscured.},
doi = {10.1103/PhysRevResearch.1.023011},
journal = {Physical Review Research},
number = 2,
volume = 1,
place = {United States},
year = {Tue Sep 10 00:00:00 EDT 2019},
month = {Tue Sep 10 00:00:00 EDT 2019}
}
https://doi.org/10.1103/PhysRevResearch.1.023011
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