Colossal magnetoresistance in a Mott insulator via magnetic field-driven insulator-metal transition
- 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- 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, Vol. 116, Issue 21; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Insulator–metal transition induced by electric voltage in a ruthenate Mott insulator
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journal | March 2019 |
Magnetoelectric multipoles in metals
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journal | October 2018 |
Holographic DC conductivity for backreacted nonlinear electrodynamics with momentum dissipation
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journal | January 2019 |
Magnetoelectric multipoles in metals | text | January 2018 |
Holographic DC Conductivity for Backreacted Nonlinear Electrodynamics with Momentum Dissipation | text | January 2018 |
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