TY - JOUR
T1 - Magnetic field induced reconstruction of electronic structure in Sr3 Ru2 O7 nanosheets
AU - Chu, Weiwei
AU - Wang, Ning
AU - Liu, Yan
AU - Wang, Yu
AU - Liu, Guoqiang
AU - Han, Yuyan
AU - Hao, Ning
AU - Qu, Zhe
AU - Yang, Jiyong
AU - Xue, Fei
AU - Mao, Zhiqiang
AU - Tian, Mingliang
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grants No. U19A2093, No. 11674323, No. 11804297, No. 11774352, No. 11774305, No. U1432251, and No. U1832214); Collaboration Innovation Program of Hefei Science Center, CAS (Grant No. 2019HSC-CIP 001); the CAS/SAFEA international partnership program for creative research teams of China. The work at PSU is supported by the US National Science Foundation under Grant No. DMR 1917579.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/11/12
Y1 - 2020/11/12
N2 - The origin of the large magnetoresistance (MR) peak induced by the metamagnetic transition (MMT) in Sr3Ru2O7 has attracted extensive attention, but still remains puzzling. Here we performed systematic magnetotransport and torque magnetometry measurements of Sr3Ru2O7 nanosheets, and found surprisingly that the MR peak, together with the MMT, shifts dramatically toward low magnetic field with the decrease of thickness. Meanwhile, the Hall coefficient shows clearly a sign change near the MR peak position, indicating a magnetic field induced change of band topology. Combined with the theoretical calculation, we argue that the nature of the MR peak in Sr3Ru2O7 is associated with the so-called Lifshitz transition due to van Hove singularity, which is closer to the Fermi level in thinner nanosheets.
AB - The origin of the large magnetoresistance (MR) peak induced by the metamagnetic transition (MMT) in Sr3Ru2O7 has attracted extensive attention, but still remains puzzling. Here we performed systematic magnetotransport and torque magnetometry measurements of Sr3Ru2O7 nanosheets, and found surprisingly that the MR peak, together with the MMT, shifts dramatically toward low magnetic field with the decrease of thickness. Meanwhile, the Hall coefficient shows clearly a sign change near the MR peak position, indicating a magnetic field induced change of band topology. Combined with the theoretical calculation, we argue that the nature of the MR peak in Sr3Ru2O7 is associated with the so-called Lifshitz transition due to van Hove singularity, which is closer to the Fermi level in thinner nanosheets.
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U2 - 10.1103/PhysRevB.102.195119
DO - 10.1103/PhysRevB.102.195119
M3 - Article
AN - SCOPUS:85097170597
SN - 2469-9950
VL - 102
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 19
M1 - 195119
ER -