Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10429385" target="_blank" >RIV/00216208:11320/21:10429385 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=OcZRtc8zOo" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=OcZRtc8zOo</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.7566/JPSJ.90.074705" target="_blank" >10.7566/JPSJ.90.074705</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2

Popis výsledku v původním jazyce

We report the magnetoresistance under pressure in the novel spin-triplet superconductor UTe2 close to the critical pressure P-c, where the superconducting phase terminates, for field along the three a, b, and c-axes in the orthorhombic structure. The superconducting phase for H parallel to a-axis just below P-c shows a field-reentrant behavior due to the competition with the emergence of magnetic order at low fields. The upper critical field H-c2 for H parallel to c-axis shows a quasi-vertical increase in the H-T phase diagram just below P-c, indicating that superconductivity is reinforced by the strong fluctuations which persist even at high fields above 20 T. Increasing pressure leads to the disappearance of superconductivity at zero field with the emergence of magnetic order. Surprisingly, field-induced superconductivity is observed at high fields, where a spin-polarized state is realized due to the suppression of the magnetic ordered phases; the spin-polarized state is favorable for superconductivity, whereas the magnetic ordered phase at low field seems to be unfavorable. The huge H-c2 in the spin-polarized state seems to imply a spin-triplet state. Contrary to the a- and c-axes, no field-reinforcement of superconductivity occurs for magnetic field along the b-axis. We compare the results with the field-reentrant superconductivity above the metamagnetic field, H-m for the field direction tilted by similar to 30 deg from b to c-axis at ambient pressure as well as the field-reentrant (-reinforced) superconductivity in ferromagnetic superconductors, URhGe and UCoGe.

Název v anglickém jazyce

Field-Induced Superconductivity near the Superconducting Critical Pressure in UTe2

Popis výsledku anglicky

We report the magnetoresistance under pressure in the novel spin-triplet superconductor UTe2 close to the critical pressure P-c, where the superconducting phase terminates, for field along the three a, b, and c-axes in the orthorhombic structure. The superconducting phase for H parallel to a-axis just below P-c shows a field-reentrant behavior due to the competition with the emergence of magnetic order at low fields. The upper critical field H-c2 for H parallel to c-axis shows a quasi-vertical increase in the H-T phase diagram just below P-c, indicating that superconductivity is reinforced by the strong fluctuations which persist even at high fields above 20 T. Increasing pressure leads to the disappearance of superconductivity at zero field with the emergence of magnetic order. Surprisingly, field-induced superconductivity is observed at high fields, where a spin-polarized state is realized due to the suppression of the magnetic ordered phases; the spin-polarized state is favorable for superconductivity, whereas the magnetic ordered phase at low field seems to be unfavorable. The huge H-c2 in the spin-polarized state seems to imply a spin-triplet state. Contrary to the a- and c-axes, no field-reinforcement of superconductivity occurs for magnetic field along the b-axis. We compare the results with the field-reentrant superconductivity above the metamagnetic field, H-m for the field direction tilted by similar to 30 deg from b to c-axis at ambient pressure as well as the field-reentrant (-reinforced) superconductivity in ferromagnetic superconductors, URhGe and UCoGe.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of the Physical Society of Japan

ISSN

0031-9015

e-ISSN

—

Svazek periodika

90

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

6

Strana od-do

074705

Kód UT WoS článku

000669534200021

EID výsledku v databázi Scopus

2-s2.0-85107982433