Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2

Nabhanila Nandi; Thomas Scaffidi; Pallavi Kushwaha; Seunghyun Khim; Mark E. Barber; Veronika Sunko; Federico Mazzola; Philip D.C. King; Helge Rosner; Philip J.W. Moll; Markus König; Joel E. Moore; Sean Hartnoll; Andrew P. Mackenzie

doi:10.1038/s41535-018-0138-8

Unconventional magneto-transport in ultrapure PdCoO₂ and PtCoO₂

Nabhanila Nandi, Thomas Scaffidi, Pallavi Kushwaha, Seunghyun Khim, Mark E. Barber, Veronika Sunko, Federico Mazzola, Philip D.C. King, Helge Rosner, Philip J.W. Moll, Markus König, Joel E. Moore, Sean Hartnoll, Andrew P. Mackenzie^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The single-band, quasi-two dimensional metals PdCoO₂ and PtCoO₂ have recently come to prominence because of their extremely long mean free paths, which establish them as some of the most electronically pure materials known, and as potential hosts of previously unobservable regimes of electronic transport. To fully establish their magnetotransport properties, we have studied the magnetoresistance and Hall effect in bulk single crystals to which electrical contacts have been made with high precision using focused ion beam machining. We observe a strong temperature dependence of the Hall resistivity in small applied fields, linked to a large violation of Kohler’s rule in the magnetoresistance. We discuss the extent to which these observations can be accounted for by standard transport theory.

Original language	English
Article number	66
Number of pages	16
Journal	npj Quantum Materials
Volume	3
DOIs	https://doi.org/10.1038/s41535-018-0138-8
Publication status	Published - 18 Dec 2018

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Final published version, 1.46 MBLicence: CC BY

CM DTC 2014 - 2022: EPSRC centre for doctoral training in condensed matter physics: Renewal of the CM-DTC
King, P. (PI)
EPSRC
1/08/14 → 31/01/24
Project: Standard
Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems
Wahl, P. (PI), Baumberger, F. (CoI), Davis, J. C. (CoI), Green, A. (CoI), Hooley, C. (CoI), Keeling, J. M. J. (CoI) & Mackenzie, A. (CoI)
EPSRC
1/09/11 → 31/08/17
Project: Standard

Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2
Kushwaha, P. (Contributor), Sunko, V. (Contributor), Barber, M. E. (Contributor), Rosner, H. (Contributor), Khim, S. (Contributor), Mackenzie, A. P. (Contributor), Nandi, N. (Contributor), Moll, P. J. W. (Contributor), Scaffidi, T. (Contributor), Mazzola, F. (Contributor), King, P. D. C. (Contributor), König, M. (Contributor), Moore, J. E. (Contributor) & Hartnoll, S. (Contributor), Max Planck Digital Library, 1 Jan 2022
DOI: 10.17617/3.1t
Dataset

Cite this

@article{40ad6e43d5a044c1b1769e46dfea98d8,

title = "Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2",

abstract = "The single-band, quasi-two dimensional metals PdCoO2 and PtCoO2 have recently come to prominence because of their extremely long mean free paths, which establish them as some of the most electronically pure materials known, and as potential hosts of previously unobservable regimes of electronic transport. To fully establish their magnetotransport properties, we have studied the magnetoresistance and Hall effect in bulk single crystals to which electrical contacts have been made with high precision using focused ion beam machining. We observe a strong temperature dependence of the Hall resistivity in small applied fields, linked to a large violation of Kohler{\textquoteright}s rule in the magnetoresistance. We discuss the extent to which these observations can be accounted for by standard transport theory.",

author = "Nabhanila Nandi and Thomas Scaffidi and Pallavi Kushwaha and Seunghyun Khim and Barber, {Mark E.} and Veronika Sunko and Federico Mazzola and King, {Philip D.C.} and Helge Rosner and Moll, {Philip J.W.} and Markus K{\"o}nig and Moore, {Joel E.} and Sean Hartnoll and Mackenzie, {Andrew P.}",

note = "We acknowledge the support of the Max Planck Society, support from the European Research Council (through the QUESTDO project), and the Engineering and Physical Sciences Research Council, UK (grant no. EP/I031014/1). T.S. acknowledges support from the Emergent Phenomena in Quantum Systems initiative of the Gordon and Betty Moore Foundation, V.S. thanks EPSRC for PhD studentship support through grant number EP/L015110/1 and J.E.M acknowledges the support of NSF DMR-1507141.",

year = "2018",

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doi = "10.1038/s41535-018-0138-8",

language = "English",

volume = "3",

journal = "npj Quantum Materials",

issn = "2397-4648",

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T1 - Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2

AU - Nandi, Nabhanila

AU - Scaffidi, Thomas

AU - Kushwaha, Pallavi

AU - Khim, Seunghyun

AU - Barber, Mark E.

AU - Sunko, Veronika

AU - Mazzola, Federico

AU - King, Philip D.C.

AU - Rosner, Helge

AU - Moll, Philip J.W.

AU - König, Markus

AU - Moore, Joel E.

AU - Hartnoll, Sean

AU - Mackenzie, Andrew P.

N1 - We acknowledge the support of the Max Planck Society, support from the European Research Council (through the QUESTDO project), and the Engineering and Physical Sciences Research Council, UK (grant no. EP/I031014/1). T.S. acknowledges support from the Emergent Phenomena in Quantum Systems initiative of the Gordon and Betty Moore Foundation, V.S. thanks EPSRC for PhD studentship support through grant number EP/L015110/1 and J.E.M acknowledges the support of NSF DMR-1507141.

PY - 2018/12/18

Y1 - 2018/12/18

N2 - The single-band, quasi-two dimensional metals PdCoO2 and PtCoO2 have recently come to prominence because of their extremely long mean free paths, which establish them as some of the most electronically pure materials known, and as potential hosts of previously unobservable regimes of electronic transport. To fully establish their magnetotransport properties, we have studied the magnetoresistance and Hall effect in bulk single crystals to which electrical contacts have been made with high precision using focused ion beam machining. We observe a strong temperature dependence of the Hall resistivity in small applied fields, linked to a large violation of Kohler’s rule in the magnetoresistance. We discuss the extent to which these observations can be accounted for by standard transport theory.

AB - The single-band, quasi-two dimensional metals PdCoO2 and PtCoO2 have recently come to prominence because of their extremely long mean free paths, which establish them as some of the most electronically pure materials known, and as potential hosts of previously unobservable regimes of electronic transport. To fully establish their magnetotransport properties, we have studied the magnetoresistance and Hall effect in bulk single crystals to which electrical contacts have been made with high precision using focused ion beam machining. We observe a strong temperature dependence of the Hall resistivity in small applied fields, linked to a large violation of Kohler’s rule in the magnetoresistance. We discuss the extent to which these observations can be accounted for by standard transport theory.

U2 - 10.1038/s41535-018-0138-8

DO - 10.1038/s41535-018-0138-8

M3 - Article

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VL - 3

JO - npj Quantum Materials

JF - npj Quantum Materials

M1 - 66

ER -

Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2

Abstract

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Projects

CM DTC 2014 - 2022: EPSRC centre for doctoral training in condensed matter physics: Renewal of the CM-DTC

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

Datasets