TY - JOUR
T1 - Superconducting dome underlying bipolaronic insulating state in charge-doped Ti4O7epitaxial films
AU - Soma, Takuto
AU - Kobayashi, Tomohiro
AU - Yoshimatsu, Kohei
AU - Ohtomo, Akira
N1 - Funding Information:
Acknowledgment This work was partly supported by MEXT Elements Strategy Initiative to Form Core Research Center (Grant No. JPMXP0112101001) and a Grant-in-Aid for Scientific Research (Nos. 18H03925, 19H02588, 20K15169, and 20K20887) from the Japan Society for the Promotion of Science Foundation.
Publisher Copyright:
© 2021 The Physical Society of Japan.
PY - 2021/2/15
Y1 - 2021/2/15
N2 - The bipolaronic insulating (BI) state can cause the emergent superconducting phase when the strength of electron- phonon interaction is deliberately reduced. In this report, we have investigated electronic phase diagram of the wellknown BI compound Ti4O7 by analyzing the transport properties of over 40 epitaxial-film samples. The diagram captures the systematic suppression of the BI state with increasing the number of doped electrons and a superconducting dome located under the BI state. The coexistence of the BI and superconducting states suggests the bipolaronic superconductivity in Ti4O7 epitaxial films.
AB - The bipolaronic insulating (BI) state can cause the emergent superconducting phase when the strength of electron- phonon interaction is deliberately reduced. In this report, we have investigated electronic phase diagram of the wellknown BI compound Ti4O7 by analyzing the transport properties of over 40 epitaxial-film samples. The diagram captures the systematic suppression of the BI state with increasing the number of doped electrons and a superconducting dome located under the BI state. The coexistence of the BI and superconducting states suggests the bipolaronic superconductivity in Ti4O7 epitaxial films.
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U2 - 10.7566/JPSJ.90.023705
DO - 10.7566/JPSJ.90.023705
M3 - Article
AN - SCOPUS:85099975491
SN - 0031-9015
VL - 90
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 2
M1 - 023705
ER -