Hidden magnetism at the pseudogap critical point of a cuprate superconductor
Mehdi Frachet
(1)
,
Igor Vinograd
(1)
,
Rui Zhou
(1)
,
Siham Benhabib
(1)
,
Shangfei Wu
(1)
,
Hadrien Mayaffre
(2)
,
Steffen Krämer
(2)
,
Sanath K. Ramakrishna
(3)
,
Arneil Reyes
(3)
,
Jérôme Debray
(4)
,
Tohru Kurosawa
(5)
,
Naoki Momono
(6)
,
Migaku Oda
(5)
,
Seiki Komiya
(7)
,
Shimpei Ono
(8)
,
Masafumi Horio
(9)
,
Johan Chang
(9)
,
Cyril Proust
(2)
,
Marc-Henri Julien
(2)
,
David Lebøeuf
(2)
1
LNCMI-T -
Laboratoire national des champs magnétiques intenses - Toulouse
2 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
3 FSU - Florida State University [Tallahassee]
4 NEEL - CrisMass - Cristaux massifs
5 Hokkaido University [Sapporo, Japan]
6 Muroran Institute of Technology
7 Central Research Institute of Electric Power Industry
8 Central Research Institute of Electrical Power Industry
9 UZH - Universität Zürich [Zürich] = University of Zurich
2 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
3 FSU - Florida State University [Tallahassee]
4 NEEL - CrisMass - Cristaux massifs
5 Hokkaido University [Sapporo, Japan]
6 Muroran Institute of Technology
7 Central Research Institute of Electric Power Industry
8 Central Research Institute of Electrical Power Industry
9 UZH - Universität Zürich [Zürich] = University of Zurich
Siham Benhabib
- Fonction : Auteur
- PersonId : 781683
- ORCID : 0000-0001-6756-487X
Steffen Krämer
- Fonction : Auteur
- PersonId : 751408
- IdHAL : steffen-kramer
- ORCID : 0000-0002-6107-3583
Jérôme Debray
- Fonction : Auteur
- PersonId : 7492
- IdHAL : jerome-debray
- ORCID : 0000-0002-8013-6199
- IdRef : 152792716
Cyril Proust
- Fonction : Auteur
- PersonId : 741189
- IdHAL : cyril-proust
- ORCID : 0000-0003-0821-2094
- IdRef : 143476963
Marc-Henri Julien
- Fonction : Auteur
- PersonId : 179268
- IdHAL : marc-henri-julien
- ORCID : 0000-0003-2378-3258
- IdRef : 11533338X
David Lebøeuf
- Fonction : Auteur
- PersonId : 741641
- IdHAL : david-le-boeuf
- ORCID : 0000-0002-4258-154X
- IdRef : 24437550X
Résumé
The mysterious pseudogap phase of cuprate superconductors ends at a critical hole doping level p* but the nature of the ground state below p* is still debated. Here, we show that the genuine nature of the magnetic ground state in La2-xSrxCuO4 is hidden by competing effects from superconductivity: applying intense magnetic fields to quench superconductivity, we uncover the presence of glassy antiferromagnetic order up to the pseudogap boundary p* ~ 0.19, and not above. There is thus a quantum phase transition at p*, which is likely to underlie highfield observations of a fundamental change in electronic properties across p*. Furthermore, the continuous presence of quasi-static moments from the insulator up to p* suggests that the physics of the doped Mott insulator is relevant through the entire pseudogap regime and might be more fundamentally driving the transition at p* than just spin or charge ordering.