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Interplanar coupling-dependent magnetoresistivity in high-purity layered metals.

Title: Interplanar coupling-dependent magnetoresistivity in high-purity layered metals.
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Name(s): Kikugawa, N, author
Goswami, P, author
Kiswandhi, A, author
Choi, E S, author
Graf, D, author
Baumbach, R E, author
Brooks, J S, author
Sugii, K, author
Iida, Y, author
Nishio, M, author
Uji, S, author
Terashima, T, author
Rourke, P M C, author
Hussey, N E, author
Takatsu, H, author
Yonezawa, S, author
Maeno, Y, author
Balicas, L, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2016-03-29
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The magnetic field-induced changes in the conductivity of metals are the subject of intense interest, both for revealing new phenomena and as a valuable tool for determining their Fermi surface. Here we report a hitherto unobserved magnetoresistive effect in ultra-clean layered metals, namely a negative longitudinal magnetoresistance that is capable of overcoming their very pronounced orbital one. This effect is correlated with the interlayer coupling disappearing for fields applied along the so-called Yamaji angles where the interlayer coupling vanishes. Therefore, it is intrinsically associated with the Fermi points in the field-induced quasi-one-dimensional electronic dispersion, implying that it results from the axial anomaly among these Fermi points. In its original formulation, the anomaly is predicted to violate separate number conservation laws for left- and right-handed chiral (for example, Weyl) fermions. Its observation in PdCoO2, PtCoO2 and Sr2RuO4 suggests that the anomaly affects the transport of clean conductors, in particular near the quantum limit.
Identifier: FSU_pmch_27020134 (IID), 10.1038/ncomms10903 (DOI), PMC4820545 (PMCID), 27020134 (RID), 27020134 (EID), ncomms10903 (PII)
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4820545.
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_27020134
Host Institution: FSU
Is Part Of: Nature communications.
2041-1723
Issue: vol. 7

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Kikugawa, N., Goswami, P., Kiswandhi, A., Choi, E. S., Graf, D., Baumbach, R. E., … Balicas, L. (2016). Interplanar coupling-dependent magnetoresistivity in high-purity layered metals. Nature Communications. Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_27020134