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Title: Atsushi Miyake: Metamagnetic transition in heavy fermion superconductor UTe2
Number: 16/21
Status: Closing date exceeded
Begin: Wednesday, 31.03. 2021, 10:10
Tutor: Ross H. Colman & Vladimír Sechovský
Location: ZOOM Meeting ID: 958 0426 7376


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We have a pleasure to invite you to attend the joint seminar
of the Department of Condensed Matter Physics (DCMP)
and the Materials Growth and Measurement Laboratory (MGML) http://mgml.eu.

 

Program

 

Metamagnetic transition in heavy fermion superconductor UTe2

lecture given by:

Atsushi Miyake

The Institute for Solid State Physics, The Univ. of Tokyo, Japan

 

https://cesnet.zoom.us/j/95804267376
Meeting ID: 958 0426 7376 

on Wednesday, 31.3. 2021 from 10:10 CET (8.10 UTC) 


Passcode will be provided on request at  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Ross H. Colman & Vladimír Sechovský
On behalf of the DCMP and MGML


Abstract 

Recently discovered paramagnetic heavy-fermion superconductor UTe2 attracts significant attention due to its unconventional superconductivity (SC) [1, 2]. The superconducting transition temperature of Tsc = 1.6 K is relatively high among uranium superconductors, and the SC in UTe2 is believed to be of a spin-triplet type. In contrast to the previous spin-triplet ferromagnetic (FM) SC, the SC of UTe2 emerges inthe PM state, which seems to locate near an FM phase. A similarity to the FMSC [3] is field-reentrantSC for H || b-axis, which is perpendicular to the easy magnetization a-axis at low fields [4]. It is expected that magnetic fluctuations would drastically develop at high fields.To reveal high-field properties of UTe2 for H || b, we have studied magnetization and specific heat of single crystal of UTe2 in pulsed-magnetic fields and observed metamagnetic transition at 35 T with significant enhancement of effective mass [6, 7]. In this talk, we will discuss the relation between metamagnetic transition and re-entrant SC by comparing FMSC.

References

[1] S. Ran et al., Science 365, 684 (2019).
[2] D. Aoki et al., J. Phys. Soc. Jpn. 88, 043702 (2019).
[3] D. Aoki et al., J. Phys. Soc. Jpn. 88, 022001 (2019).
[4] G. Knebel et al., J. Phys. Soc. Jpn. 88, 063707 (2019).
[6] A. Miyake et al., J. Phys. Soc. Jpn. 88, 063706 (2019).
[7] S. Imajo et al., J. Phys. Soc. Jpn. 88, 083705 (2109).