Single-gap superconductivity in β- Bi2Pd
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2016-04-05Citation
10.1103/PhysRevB.93.144502
Physical Review B - Condensed Matter and Materials Physics 93.14 (2016): 144502
ISSN
2469-9950 (print); 2469-9969 (online)DOI
10.1103/PhysRevB.93.144502Funded by
This work was supported by the Slovak projects APVV-0036-11, APVV-14-0605, VEGA 2/0149/16, VEGA 1/0409/15, by the ERDF EU grant under contract No. ITMS26220120005 and the COST action MP1201 as well as by the U.S. Steel Kosice. Sample growth was partially supported by the projects No. FIS2014-54498-R (MINECO, Spain) and No. S2013/MIT-2850 Nanofrontmag-CM (Region of Madrid, Spain) and by the Engineering and Physical Sciences Research Council, UK. E.H. acknowledges support from the Grant No. 560-2012 programa de doctorados en el exterior (COLCIENCIAS)Project
Gobierno de España. FIS2014-54498-R; Comunidad de Madrid. S2013/MIT-2850/NANOFRONTMAG-CMEditor's Version
http://dx.doi.org/10.1103/PhysRevB.93.144502Subjects
Single-gap; Superconductivity; FísicaRights
© 2016 American Physical SocietyAbstract
The β-Bi2Pd compound has been proposed as another example of a multigap superconductor [Imai et al., J. Phys. Soc. Jpn. 81, 113708 (2012)]. Here, we report on measurements of several important physical quantities capable of showing a presence of multiple energy gaps on our superconducting single crystals of β-Bi2Pd with the critical temperature Tc close to 5 K. The calorimetric study via a sensitive ac technique shows a sharp anomaly at the superconducting transition, however only a single energy gap is detected. Also other characteristics inferred from calorimetric measurements as the field dependence of the Sommerfeld coefficient and the temperature and angular dependence of the upper critical magnetic field point unequivocally to standard single s-wave gap superconductivity. The Hall-probe magnetometry provides the same result from the analysis of the temperature dependence of the lower critical field. A single-gapped BCS density of states is detected by the scanning tunneling spectroscopy measurements. Then, the bulk as well as the surface sensitive probes evidence a standard conventional superconductivity in this system where the topologically protected surface states have been recently detected by angle-resolved photoemission spectroscopy [Sakano et al., Nat. Commun. 6, 8595 (2015).]
Files in this item
Google Scholar:Kačmarčík, J.
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Pribulová, Z.
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Samuely, T.
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Szabó, P.
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Cambel, V.
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Šoltýs, J.
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Herrera Vasco, Edwin
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Suderow Rodríguez, Hermann Jesús
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Correa-Orellana, A.
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Prabhakaran, D.
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Samuely, P.
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