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DOE OSTI · 1823055

Spin-orbit coupling driven orbital-selective doping effect in Sr 2 Ru 1 - x Ir x O 4

Kwon, Junyoung·Kim, Beom Seo·Kim, Mi Kyung·Denlinger, Jonathan·Bostwick, Aaron·Rotenberg, Eli·Lee, Nara·Choi, Hwan Young·Moon, Jae Young·Choi, Young Jai·Mun, Junsik·Kim, Miyoung·Yoshida, Yoshiyuki·Kyung, Wonshik·Kim, Changyoung
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Abstract

Orbital-selective phenomena in mutliorbital systems have received much attention due to their uniqueness as well as possible connections to other phenomena. As orbital-selectiveness is mostly related to the crystal structure, finding a new control parameter other than structure would be of significant importance. Here in this paper we report discovery of an orbital-selective doping effect in Sr 2 Ru 1 - x Ir x O 4 (SRIO). Our systematic electronic structure study of SRIO reveals an anomalous orbital-selective doping effect and concomitant Lifshitz transitions (LTs) in the γ band. With the help of a tight-binding calculation, we find that the orbital-selective doping effect is due to variation in the spin-orbit coupling (SOC) strength. Our findings not only elucidate the mechanism of LTs in the γ band in SRIO but may also open new avenues for novel SOC-controlled orbital-selective phenomena.

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Kwon, Junyoung, Kim, Beom Seo, Kim, Mi Kyung, Denlinger, Jonathan, Bostwick, Aaron, Rotenberg, Eli, Lee, Nara, Choi, Hwan Young, Moon, Jae Young, Choi, Young Jai, Mun, Junsik, Kim, Miyoung, Yoshida, Yoshiyuki, Kyung, Wonshik, Kim, Changyoung. 2021-02-12. Spin-orbit coupling driven orbital-selective doping effect in Sr 2 Ru 1 - x Ir x O 4. https://doi.org/10.1103/physrevb.103.l081104

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