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Calorimetric eviden...
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Shipulin, IlyaInstitute for Metallic Materials, Leibniz-IFW Dresden, D-01069, Dresden, Germany; Institute for Solid State and Materials Physics, Technische Universität Dresden, D-01069, Dresden, Germany
(författare)
Calorimetric evidence for two phase transitions in Calorimetric evidence for two phase transitions in Ba1−xKxFe2As2 with fermion pairing and quadrupling states
- Artikel/kapitelEngelska2023
Förlag, utgivningsår, omfång ...
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Nature Research,2023
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-339045
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-339045URI
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https://doi.org/10.1038/s41467-023-42459-0DOI
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20231128
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Materials that break multiple symmetries allow the formation of four-fermion condensates above the superconducting critical temperature (T c). Such states can be stabilized by phase fluctuations. Recently, a fermionic quadrupling condensate that breaks the Z 2 time-reversal symmetry was reported in Ba1−xKxFe2As2. A phase transition to the new state of matter should be accompanied by a specific heat anomaly at the critical temperature where Z 2 time-reversal symmetry is broken (TcZ2>Tc). Here, we report on detecting two anomalies in the specific heat of Ba1−xKxFe2As2 at zero magnetic field. The anomaly at the higher temperature is accompanied by the appearance of a spontaneous Nernst effect, indicating the breakdown of Z 2 symmetry. The second anomaly at the lower temperature coincides with the transition to a zero-resistance state, indicating the onset of superconductivity. Our data provide the first example of the appearance of a specific heat anomaly above the superconducting phase transition associated with the broken time-reversal symmetry due to the formation of the novel fermion order.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Stegani, NadiaUniversity of Genoa, Via Dodecaneso 33, 16146, Genoa, Italy; Consiglio Nazionale delle Ricerche (CNR)-SPIN, Corso Perrone 24, 16152, Genova, Italy
(författare)
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Maccari, IlariaKTH,Kondenserade materiens teori,Laboratory for Theoretical and Computational Physics, Paul Scherrer Institute, 5232, Villigen PSI, Switzerlanderland(Swepub:kth)u1g4r4ts
(författare)
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Kihou, KunihiroNational Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan
(författare)
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Lee, Chul HoNational Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568, Japan
(författare)
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Hu, QuanxinTsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 201210, China
(författare)
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Zheng, YuTsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 201210, China
(författare)
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Yang, FazhiTsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 201210, China
(författare)
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Li, YongweiTsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 201210, China
(författare)
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Yim, Chi MingTsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 201210, China; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
(författare)
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Hühne, RubenInstitute for Metallic Materials, Leibniz-IFW Dresden, D-01069, Dresden, Germany
(författare)
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Klauss, Hans HenningInstitute for Solid State and Materials Physics, Technische Universität Dresden, D-01069, Dresden, Germany
(författare)
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Putti, MarinaUniversity of Genoa, Via Dodecaneso 33, 16146, Genoa, Italy; Consiglio Nazionale delle Ricerche (CNR)-SPIN, Corso Perrone 24, 16152, Genova, Italy
(författare)
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Caglieris, FedericoUniversity of Genoa, Via Dodecaneso 33, 16146, Genoa, Italy; Consiglio Nazionale delle Ricerche (CNR)-SPIN, Corso Perrone 24, 16152, Genova, Italy; Institute for Solid State Research, Leibniz-IFW Dresden, D-01069, Dresden, Germany
(författare)
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Babaev, EgorKTH,Kondenserade materiens teori(Swepub:kth)u1fe570h
(författare)
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Grinenko, VadimTsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 201210, China; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
(författare)
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Institute for Metallic Materials, Leibniz-IFW Dresden, D-01069, Dresden, Germany; Institute for Solid State and Materials Physics, Technische Universität Dresden, D-01069, Dresden, GermanyUniversity of Genoa, Via Dodecaneso 33, 16146, Genoa, Italy; Consiglio Nazionale delle Ricerche (CNR)-SPIN, Corso Perrone 24, 16152, Genova, Italy
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Nature Communications: Nature Research14:12041-1723
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Shipulin, Ilya
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Stegani, Nadia
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Maccari, Ilaria
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Kihou, Kunihiro
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Lee, Chul Ho
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Hu, Quanxin
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visa fler...
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Zheng, Yu
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Yang, Fazhi
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Li, Yongwei
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Yim, Chi Ming
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Hühne, Ruben
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Klauss, Hans Hen ...
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Putti, Marina
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Caglieris, Feder ...
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Babaev, Egor
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Grinenko, Vadim
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