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Interplay of charge...
Interplay of charge density wave and multiband superconductivity in layered quasi-two-dimensional materials : The case of 2H-NbS2 and 2H-NbSe2
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- Majumdar, Arnab (författare)
- Uppsala universitet,Materialteori
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- VanGennep, Derrick (författare)
- Harvard Univ, Lyman Lab Phys, Cambridge, MA 02138 USA.
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- Brisbois, Jeremy (författare)
- Univ Liege, CESAM, Q MAT, Expt Phys Nanostruct Mat, B-4000 Sart Tilman Par Liege, Belgium.
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- Chareev, Dmitriy (författare)
- Russian Acad Sci, Inst Expt Mineral, Chernogolovka 142432, Moscow District, Russia.;Kazan Fed Univ, 18 Kremlyovskaya Str, Kazan 420008, Russia.;Ural Fed Univ, Ekaterinburg 620002, Russia.
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- Sadakov, Andrey V. (författare)
- Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia.
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- Usoltsev, A. S. (författare)
- Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia.
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- Mito, Masaki (författare)
- Kyushu Inst Technol, Grad Sch Engn, Fukuoka, Fukuoka 8048550, Japan.
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- Silhanek, Alejandro V. (författare)
- Univ Liege, CESAM, Q MAT, Expt Phys Nanostruct Mat, B-4000 Sart Tilman Par Liege, Belgium.
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- Sarkar, Tapati (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Hassan, Abdelwahab (författare)
- Fayoum Univ, Fac Sci, Phys Dept, Al Fayyum 63514, Egypt.
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- Karis, Olof (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Ahuja, Rajeev, 1965- (författare)
- Uppsala universitet,Materialteori
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- Abdel-Hafiez, Mahmoud (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik,Harvard Univ, Lyman Lab Phys, Cambridge, MA 02138 USA.
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(creator_code:org_t)
- American Physical Society (APS), 2020
- 2020
- Engelska.
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Ingår i: Physical Review Materials. - : American Physical Society (APS). - 2475-9953. ; 4:8
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Despite intense efforts on all known quasi-two-dimensional superconductors, the origin and exact boundary of the electronic orderings, particularly charge density waves and superconductivity, are still attractive problems with several open questions. Here, in order to reveal how the superconducting gap evolves, we report on high quality complementary measurements of magneto-optical imaging, specific heat, magnetic susceptibility, resis-tivity measurements, Andreev spectroscopy, and London penetration depth lambda(ab)(T) measurements supplemented with theoretical calculations for 2H-NbSe2 and 2H-NbS2 single crystals. The temperature dependence of lambda(ab)(T) calculated from the lower critical field and Andreev spectroscopy can be well described by using a two-band model with s-wave-like gaps. The effect of pressure on the superconducting gap of both systems illustrates that both bands are practically affected. Upon compression, the Fermi surfaces do not change significantly, and the nesting remains almost unaffected compared to that at ambient condition. However, a strong bending in the upper critical fields (H-c2) curves is obtained under pressure and support the presence of a strong Pauli paramagnetic effect. In NbSe2, using a two-band model with s-wave-like gaps, the temperature dependence H-c2(T) can be properly described. In contrast to that, the behavior of H-c2 for NbS2 is ruled by the spin paramagnetic effect. The estimated values of the penetration depth at T = 0 K confirm that NbSe2 and NbS2 superconductors depart from a Uemura-style relationship between Tc with lambda(-2)(ab) (T ), the in-plane superconducting penetration depth.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Majumdar, Arnab
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VanGennep, Derri ...
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Brisbois, Jeremy
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Chareev, Dmitriy
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Sadakov, Andrey ...
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Usoltsev, A. S.
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visa fler...
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Mito, Masaki
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Silhanek, Alejan ...
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Sarkar, Tapati
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Hassan, Abdelwah ...
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Karis, Olof
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Ahuja, Rajeev, 1 ...
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Abdel-Hafiez, Ma ...
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