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Title: Reentrant metallic behavior in the Weyl semimetal NbP

Here, we report the occurrence of reentrant metallic behavior in the Weyl semimetal NbP. When the applied magnetic field H is above a critical value H c, a reentrance appears as a peak in the temperature-dependent resistivity ρ xx(T) at T=T p, similar to that observed in graphite where it was attributed to local superconductivity. The Tp(H) relationship follows a power-law dependence T p~(H–H c) 1/ν where ν can be derived from the temperature dependence of the zero-field resistivity ρ 0(T)~T ν. From concurrent measurements of the transverse ρ xx(T) and Hall ρ xy(T) magnetoresistivities, we reveal a clear correlation between the rapidly increasing ρ xy(T) and the occurrence of a peak in the ρ xx(T) curve. Quantitative analysis indicates that the reentrant metallic behavior arises from the competition of the magnetoconductivity σ xx(T) with an additional component Δσ xx(T)=κHσ xx(T) where κ H=[ρ xy(T)/ρ xx(T)] 2 is the Hall factor. We find that the Hall factor (κ H≈0.4) at peak temperature T p is nearly field independent, leading to the observed T p(H) relationship. Furthermore, the reentrant metallic behavior in ρ xx(T) also is reflected in the behavior of ρ xx(H) that ranges from nonsaturating at T > 70Kmore » to saturation at liquid-helium temperatures. The latter can be explained with the magnetic field dependence of the Hall factor κ H(H). Lastly, our paper demonstrates that a semiclassical theory can account for the “anomalies” in the magnetotransport phenomena of NbP without invoking an exotic mechanism.« less
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [2] ;  [4] ;  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States);
  3. Argonne National Lab. (ANL), Argonne, IL (United States);; Univ. of Notre Dame, Notre Dame, IN (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States);; Northwestern Univ., Evanston, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 11; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1405299
Alternate Identifier(s):
OSTI ID: 1394700

Xu, J., Bugaris, D. E., Xiao, Z. L., Wang, Y. L., Chung, D. Y., Kanatzidis, M. G., and Kwok, W. K.. Reentrant metallic behavior in the Weyl semimetal NbP. United States: N. p., Web. doi:10.1103/PhysRevB.96.115152.
Xu, J., Bugaris, D. E., Xiao, Z. L., Wang, Y. L., Chung, D. Y., Kanatzidis, M. G., & Kwok, W. K.. Reentrant metallic behavior in the Weyl semimetal NbP. United States. doi:10.1103/PhysRevB.96.115152.
Xu, J., Bugaris, D. E., Xiao, Z. L., Wang, Y. L., Chung, D. Y., Kanatzidis, M. G., and Kwok, W. K.. 2017. "Reentrant metallic behavior in the Weyl semimetal NbP". United States. doi:10.1103/PhysRevB.96.115152. https://www.osti.gov/servlets/purl/1405299.
@article{osti_1405299,
title = {Reentrant metallic behavior in the Weyl semimetal NbP},
author = {Xu, J. and Bugaris, D. E. and Xiao, Z. L. and Wang, Y. L. and Chung, D. Y. and Kanatzidis, M. G. and Kwok, W. K.},
abstractNote = {Here, we report the occurrence of reentrant metallic behavior in the Weyl semimetal NbP. When the applied magnetic field H is above a critical value Hc, a reentrance appears as a peak in the temperature-dependent resistivity ρxx(T) at T=Tp, similar to that observed in graphite where it was attributed to local superconductivity. The Tp(H) relationship follows a power-law dependence Tp~(H–Hc)1/ν where ν can be derived from the temperature dependence of the zero-field resistivity ρ0(T)~Tν. From concurrent measurements of the transverse ρxx(T) and Hall ρxy(T) magnetoresistivities, we reveal a clear correlation between the rapidly increasing ρxy(T) and the occurrence of a peak in the ρxx(T) curve. Quantitative analysis indicates that the reentrant metallic behavior arises from the competition of the magnetoconductivity σxx(T) with an additional component Δσxx(T)=κHσxx(T) where κH=[ρxy(T)/ρxx(T)]2 is the Hall factor. We find that the Hall factor (κH≈0.4) at peak temperature Tp is nearly field independent, leading to the observed Tp(H) relationship. Furthermore, the reentrant metallic behavior in ρxx(T) also is reflected in the behavior of ρxx(H) that ranges from nonsaturating at T > 70K to saturation at liquid-helium temperatures. The latter can be explained with the magnetic field dependence of the Hall factor κH(H). Lastly, our paper demonstrates that a semiclassical theory can account for the “anomalies” in the magnetotransport phenomena of NbP without invoking an exotic mechanism.},
doi = {10.1103/PhysRevB.96.115152},
journal = {Physical Review B},
number = 11,
volume = 96,
place = {United States},
year = {2017},
month = {9}
}