Kim, Taeyueb Kim, Shin-Ik Joo, Sungjung Kim, Sangsu Jeon, Jeehoon Hong, Jinki Doh, Yong-Joo Baek, Seung-Hyub Koo, Hyun Cheol 2024-01-19T22:03:03Z 2024-01-19T22:03:03Z 2021-09-03 2018-08-01 2045-2322 https://pubs.kist.re.kr/handle/201004/121050 We experimentally investigated the transport properties near metal electrodes installed on a conducting channel in a LaAlO3/SrTiO3 interface. The local region around the Ti and Al electrodes has a higher electrical conductance than that of other regions, where the upper limits of the temperature and magnetic field can be well defined. Beyond these limits, the conductance abruptly decreases, as in the case of a superconductor. The samples with the Ti- or Al-electrode have an upper-limit temperature of approximately 4 K, which is 10 times higher than the conventional superconducting critical temperature of LaAlO3/SrTiO3 interfaces and delta-doped SrTiO3. This phenomenon is explained by the mechanism of electron transfer between the metal electrodes and electronic d-orbitals in the LaAlO3/SrTiO3 interface. The transferred electrons trigger a phase transition to a superconductor-like state. Our results contribute to the deep understanding of the superconductivity in the LaAlO3/SrTiO3 interface and will be helpful for the development of high-temperature interface superconductors. English NATURE PUBLISHING GROUP COEXISTENCE GAS A possible superconductor-like state at elevated temperatures near metal electrodes in an LaAlO3/SrTiO3 interface Article 10.1038/s41598-018-29945-y 1 SCIENTIFIC REPORTS, v.8 SCIENTIFIC REPORTS 8 scie scopus 000440411900007 2-s2.0-85050996214 Multidisciplinary Sciences Science & Technology - Other Topics Article COEXISTENCE GAS LaAlO3/SrTiO3 superconductor-like magnetoresistance electron transfer phase transition