Colossal magnetoresistance in a Mott insulator via magnetic field-driven insulator-metal transition

Zhu, M.; Peng, J.; Zou, T.; Prokes, K.; Mahanti, S. D.; Hong, Tao; Mao, Z. Q.; Liu, G. Q.; Ke, X.

doi:10.1103/PhysRevLett.116.216401

Colossal magnetoresistance in a Mott insulator via magnetic field-driven insulator-metal transition

Journal Article · Wed May 25 00:00:00 EDT 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.116.216401· OSTI ID:1344989

Zhu, M. ^[1]; Peng, J. ^[2]; Zou, T. ^[1]; Prokes, K. ^[3]; Mahanti, S. D. ^[1]; Hong, Tao ^[4]; Mao, Z. Q. ^[2]; Liu, G. Q. ^[5]; Ke, X. ^[1]

Michigan State Univ., East Lansing, MI (United States)
Tulane Univ., New Orleans, LA (United States)
Helmholtz Zentrum Berlin, Berlin (Germany)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Chinese Academy of Sciences, Ningbo (China)

Here, we present a new type of colossal magnetoresistance (CMR) arising from an anomalous collapse of the Mott insulating state via a modest magnetic field in a bilayer ruthenate, Ti-doped Ca₃Ru₂O₇. Such an insulator-metal transition is accompanied by changes in both lattice and magnetic structures. Our findings have important implications because a magnetic field usually stabilizes the insulating ground state in a Mott-Hubbard system, thus calling for a deeper theoretical study to reexamine the magnetic field tuning of Mott systems with magnetic and electronic instabilities and spin-lattice-charge coupling. This study further provides a model approach to search for CMR systems other than manganites, such as Mott insulators in the vicinity of the boundary between competing phases.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1344989

Alternate ID(s):: OSTI ID: 1254386

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 116; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Magnetoelectric multipoles in metals Thöle, Florian; Spaldin, Nicola A. arXiv https://doi.org/10.48550/arxiv.1804.06314	text	January 2018
Holographic DC Conductivity for Backreacted Nonlinear Electrodynamics with Momentum Dissipation Wang, Peng; Wu, Houwen; Yang, Haitang arXiv https://doi.org/10.48550/arxiv.1805.07913	text	January 2018

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