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Electric-field-induced metal maintained by current of the Mott insulator Ca2RuO4.

ABSTRACT: Recently, "application of electric field (E-field)" has received considerable attention as a new method to induce novel quantum phenomena since application of E-field can tune the electronic states directly with obvious scientific and industrial advantages over other turning methods. However, E-field-induced Mott transitions are rare and typically require high E-field and low temperature. Here we report that the multiband Mott insulator Ca2RuO4 shows unique insulator-metal switching induced by applying a dry-battery level voltage at room temperature. The threshold field Eth ~40?V/cm is much weaker than the Mott gap energy. Moreover, the switching is accompanied by a bulk structural transition. Perhaps the most peculiar of the present findings is that the induced metal can be maintained to low temperature by a weak current.

SUBMITTER: Nakamura F

PROVIDER: S-EPMC3756342 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Electric-field-induced metal maintained by current of the Mott insulator Ca2RuO4.

Nakamura Fumihiko F Sakaki Mariko M Yamanaka Yuya Y Tamaru Sho S Suzuki Takashi T Maeno Yoshiteru Y

Scientific reports 20130101

Recently, "application of electric field (E-field)" has received considerable attention as a new method to induce novel quantum phenomena since application of E-field can tune the electronic states directly with obvious scientific and industrial advantages over other turning methods. However, E-field-induced Mott transitions are rare and typically require high E-field and low temperature. Here we report that the multiband Mott insulator Ca2RuO4 shows unique insulator-metal switching induced by a ...[more]

PMID: 23985626

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