Nonsaturating large magnetoresistance in semimetals

The rapidly expanding class of quantum materials known as topological semimetals (TSMs) displays unique transport properties, including a striking dependence of resistivity on applied magnetic field, that are of great interest for both scientific and technological reasons. So far, many possible sour...

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Main Authors: Leahy, Ian A., Lin, Yu-Ping, Siegfried, Peter E., Treglia, Andrew C., Song, Justin Chien Wen, Nandkishore, Rahul M., Lee, Minhyea
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/137998
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1379982023-02-28T19:49:49Z Nonsaturating large magnetoresistance in semimetals Leahy, Ian A. Lin, Yu-Ping Siegfried, Peter E. Treglia, Andrew C. Song, Justin Chien Wen Nandkishore, Rahul M. Lee, Minhyea School of Physical and Mathematical Sciences Science::Physics Nonsaturating Magnetoresistance Magnetic Susceptibility The rapidly expanding class of quantum materials known as topological semimetals (TSMs) displays unique transport properties, including a striking dependence of resistivity on applied magnetic field, that are of great interest for both scientific and technological reasons. So far, many possible sources of extraordinarily large nonsaturating magnetoresistance have been proposed. However, experimental signatures that can identify or discern the dominant mechanism and connect to available theories are scarce. Here we present the magnetic susceptibility (χ), the tangent of the Hall angle ([Formula: see text]), along with magnetoresistance in four different nonmagnetic semimetals with high mobilities, NbP, TaP, NbSb2, and TaSb2, all of which exhibit nonsaturating large magnetoresistance (MR). We find that the distinctly different temperature dependences, [Formula: see text], and the values of [Formula: see text] in phosphides and antimonates serve as empirical criteria to sort the MR from different origins: NbP and TaP are uncompensated semimetals with linear dispersion, in which the nonsaturating magnetoresistance arises due to guiding center motion, while NbSb2 and TaSb2 are compensated semimetals, with a magnetoresistance emerging from nearly perfect charge compensation of two quadratic bands. Our results illustrate how a combination of magnetotransport and susceptibility measurements may be used to categorize the increasingly ubiquitous nonsaturating large magnetoresistance in TSMs. NRF (Natl Research Foundation, S’pore) Accepted version 2020-04-21T08:36:55Z 2020-04-21T08:36:55Z 2018 Journal Article Leahy, I. A., Lin, Y.-P., Siegfried, P. E., Treglia, A. C., Song, J. C. W., Nandkishore, R. M., & Lee, M. (2018). Nonsaturating large magnetoresistance in semimeta. Proceedings of the National Academy of Sciences of the United States of America, 115 (42), 10570-10575. doi:10.1073/pnas.1808747115 0027-8424 https://hdl.handle.net/10356/137998 10.1073/pnas.1808747115 30282733 2-s2.0-85055078189 42 115 10570 10575 en Proceedings of the National Academy of Sciences of the United States of America © 2018 The Author(s). All rights reserved. This paper was published by National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America and is made available with permission of The Author(s). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Nonsaturating Magnetoresistance
Magnetic Susceptibility
spellingShingle Science::Physics
Nonsaturating Magnetoresistance
Magnetic Susceptibility
Leahy, Ian A.
Lin, Yu-Ping
Siegfried, Peter E.
Treglia, Andrew C.
Song, Justin Chien Wen
Nandkishore, Rahul M.
Lee, Minhyea
Nonsaturating large magnetoresistance in semimetals
description The rapidly expanding class of quantum materials known as topological semimetals (TSMs) displays unique transport properties, including a striking dependence of resistivity on applied magnetic field, that are of great interest for both scientific and technological reasons. So far, many possible sources of extraordinarily large nonsaturating magnetoresistance have been proposed. However, experimental signatures that can identify or discern the dominant mechanism and connect to available theories are scarce. Here we present the magnetic susceptibility (χ), the tangent of the Hall angle ([Formula: see text]), along with magnetoresistance in four different nonmagnetic semimetals with high mobilities, NbP, TaP, NbSb2, and TaSb2, all of which exhibit nonsaturating large magnetoresistance (MR). We find that the distinctly different temperature dependences, [Formula: see text], and the values of [Formula: see text] in phosphides and antimonates serve as empirical criteria to sort the MR from different origins: NbP and TaP are uncompensated semimetals with linear dispersion, in which the nonsaturating magnetoresistance arises due to guiding center motion, while NbSb2 and TaSb2 are compensated semimetals, with a magnetoresistance emerging from nearly perfect charge compensation of two quadratic bands. Our results illustrate how a combination of magnetotransport and susceptibility measurements may be used to categorize the increasingly ubiquitous nonsaturating large magnetoresistance in TSMs.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Leahy, Ian A.
Lin, Yu-Ping
Siegfried, Peter E.
Treglia, Andrew C.
Song, Justin Chien Wen
Nandkishore, Rahul M.
Lee, Minhyea
format Article
author Leahy, Ian A.
Lin, Yu-Ping
Siegfried, Peter E.
Treglia, Andrew C.
Song, Justin Chien Wen
Nandkishore, Rahul M.
Lee, Minhyea
author_sort Leahy, Ian A.
title Nonsaturating large magnetoresistance in semimetals
title_short Nonsaturating large magnetoresistance in semimetals
title_full Nonsaturating large magnetoresistance in semimetals
title_fullStr Nonsaturating large magnetoresistance in semimetals
title_full_unstemmed Nonsaturating large magnetoresistance in semimetals
title_sort nonsaturating large magnetoresistance in semimetals
publishDate 2020
url https://hdl.handle.net/10356/137998
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