Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session U71: Poster Session III (2:00pm - 4:00pm)
2:00 PM,
Thursday, March 18, 2021
Abstract: U71.00032 : Spin susceptibility and field-induced chiral stability in non-unitary chiral superconductivity*
Presenter:
Hirono Kaneyasu
(Department of Material Science, University of Hyogo)
Authors:
Hirono Kaneyasu
(Department of Material Science, University of Hyogo)
Kouki Otsuka
(Department of Material Science, University of Hyogo)
Susumu Date
(Cybermedia Center, Osaka University)
Yasumasa Hasegawa
(Department of Material Science, University of Hyogo)
The d-vector, described by two components for (kxz+kzx, kyz+kzy), leads gap function with a horizontal minimum line at kz=0. The spin susceptibility is reduced at T< Tc, and it consists to drop of Knight-shift in H//ab.
Analyzing GL eq. for non-unitary chiral Eu, the applied H//c causes field-induced chiral stability generating paramagnetic current in 3K phase. The chiral stability drives second order parameter additionally to one order parameter, and it consists to the occurrence of second superconducting transition with a new order parameter visible as zero-bias anomaly in tunneling spectroscopy. This discussion is qualitatively analogous to chiral states for unitary Eu and even-parity Eg[H.K.,et al.,PRB100(2019)214501]. The paramagnetic current is slightly reduced in non-unitary state comparing to unitary one, and it almost unchangs field-induced chiral stability.
*JHPCN:jh200032, HPCI:hp200216
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