TY - JOUR
T1 - Enhancement and discontinuity of effective mass through the first-order metamagnetic transition in UTe2
AU - Miyake, Atsushi
AU - Shimizu, Yusei
AU - Sato, Yoshiki J.
AU - Li, Dexin
AU - Nakamura, Ai
AU - Homma, Yoshiya
AU - Honda, Fuminori
AU - Flouquet, Jacques
AU - Tokunaga, Masashi
AU - Aoki, Dai
N1 - Funding Information:
Acknowledgment We thank S. Imajo, Y. Kohama, T. Kihara, T. Sakakibara, K. Miyake, K. Machida, F. Hardy, W. Knafo, G. Knebel, and J. P. Brison for the fruitful discussions. This work was supported by KAKENHI (JP15H05884, JP15H05882, JP15K21732, JP16H04006, JP15H05745, JP19H00646, JP20K03854, JP20K20889, JP20H00130, and JP20KK0061), the Precise Measurement Technology Promotion Foundation (PMTP-F), ICC-IMR, and ERC starting grant (NewHeavyFermion).
Publisher Copyright:
© 2021 The Physical Society of Japan
PY - 2021/10/15
Y1 - 2021/10/15
N2 - In this study, the metamagnetic transitions in the novel spin-triplet superconductor UTe2 are investigated based on the recently developed simultaneous measurements of magnetization and sample temperature for the applied field along the orthorhombic b-axis and close to the [011] direction, where reentrant superconductivity (RSC) is detected below and above the first-order metamagnetic transition field Hm. Combining Maxwell’s relation and the Clausius–Clapeyron equation, we obtain the field dependence of the Sommerfeld coefficient γ through the first-order metamagnetic transition. A significant enhancement in the effective mass toward Hm is detected in both field directions. In contrast, above Hm, the effective mass discontinuously decreases for H ∥ b, while it discontinuously increases for H ∥ ∼[011], which plays a crucial role in the RSC.
AB - In this study, the metamagnetic transitions in the novel spin-triplet superconductor UTe2 are investigated based on the recently developed simultaneous measurements of magnetization and sample temperature for the applied field along the orthorhombic b-axis and close to the [011] direction, where reentrant superconductivity (RSC) is detected below and above the first-order metamagnetic transition field Hm. Combining Maxwell’s relation and the Clausius–Clapeyron equation, we obtain the field dependence of the Sommerfeld coefficient γ through the first-order metamagnetic transition. A significant enhancement in the effective mass toward Hm is detected in both field directions. In contrast, above Hm, the effective mass discontinuously decreases for H ∥ b, while it discontinuously increases for H ∥ ∼[011], which plays a crucial role in the RSC.
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U2 - 10.7566/JPSJ.90.103702
DO - 10.7566/JPSJ.90.103702
M3 - Article
AN - SCOPUS:85114906389
SN - 0031-9015
VL - 90
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 10
M1 - 103702
ER -