Melting of vortex lattice in the magnetic superconductor RbEuFe4As4

A. E. Koshelev, K. Willa, R. Willa, M. P. Smylie, J. K. Bao, D. Y. Chung, M. G. Kanatzidis, W. K. Kwok, U. Welp

Research output: Contribution to journalArticle

Abstract

The iron-based superconductors are characterized by strong fluctuations due to high transition temperatures and small coherence lengths. We investigate fluctuation behavior in the magnetic iron-pnictide superconductor RbEuFe4As4 by calorimetry and transport. We find that the broadening of the specific-heat transition in magnetic fields is very well described by the lowest-Landau-level scaling. We report calorimetric and transport observations for vortex-lattice melting, which is seen as a sharp drop of the resistivity and a step of the specific heat at the magnetic-field-dependent temperature. The melting line in the temperature-magnetic field plane lies noticeably below the upper-critical-field line and its location is in quantitative agreement with theoretical predictions without fitting parameters. Finally, we compare the melting behavior of RbEuFe4As4 with other superconducting materials showing that thermal fluctuations of vortices are not as prevalent as in the high-temperature superconducting cuprates, yet they still noticeably influence the properties of the vortex matter.

Original languageEnglish
Article number094518
JournalPhysical Review B
Volume100
Issue number9
DOIs
Publication statusPublished - Sep 12 2019

Fingerprint

Superconducting materials
Melting
Vortex flow
melting
vortices
Magnetic fields
Specific heat
magnetic fields
specific heat
iron
Group 5A compounds
Calorimetry
Temperature
cuprates
Superconducting transition temperature
heat measurement
Iron
transition temperature
scaling
electrical resistivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Koshelev, A. E., Willa, K., Willa, R., Smylie, M. P., Bao, J. K., Chung, D. Y., ... Welp, U. (2019). Melting of vortex lattice in the magnetic superconductor RbEuFe4As4. Physical Review B, 100(9), [094518]. https://doi.org/10.1103/PhysRevB.100.094518

Melting of vortex lattice in the magnetic superconductor RbEuFe4As4. / Koshelev, A. E.; Willa, K.; Willa, R.; Smylie, M. P.; Bao, J. K.; Chung, D. Y.; Kanatzidis, M. G.; Kwok, W. K.; Welp, U.

In: Physical Review B, Vol. 100, No. 9, 094518, 12.09.2019.

Research output: Contribution to journalArticle

Koshelev, AE, Willa, K, Willa, R, Smylie, MP, Bao, JK, Chung, DY, Kanatzidis, MG, Kwok, WK & Welp, U 2019, 'Melting of vortex lattice in the magnetic superconductor RbEuFe4As4', Physical Review B, vol. 100, no. 9, 094518. https://doi.org/10.1103/PhysRevB.100.094518
Koshelev AE, Willa K, Willa R, Smylie MP, Bao JK, Chung DY et al. Melting of vortex lattice in the magnetic superconductor RbEuFe4As4. Physical Review B. 2019 Sep 12;100(9). 094518. https://doi.org/10.1103/PhysRevB.100.094518
Koshelev, A. E. ; Willa, K. ; Willa, R. ; Smylie, M. P. ; Bao, J. K. ; Chung, D. Y. ; Kanatzidis, M. G. ; Kwok, W. K. ; Welp, U. / Melting of vortex lattice in the magnetic superconductor RbEuFe4As4. In: Physical Review B. 2019 ; Vol. 100, No. 9.
@article{0a5ff457cff3408d9a555b0b5db997ec,
title = "Melting of vortex lattice in the magnetic superconductor RbEuFe4As4",
abstract = "The iron-based superconductors are characterized by strong fluctuations due to high transition temperatures and small coherence lengths. We investigate fluctuation behavior in the magnetic iron-pnictide superconductor RbEuFe4As4 by calorimetry and transport. We find that the broadening of the specific-heat transition in magnetic fields is very well described by the lowest-Landau-level scaling. We report calorimetric and transport observations for vortex-lattice melting, which is seen as a sharp drop of the resistivity and a step of the specific heat at the magnetic-field-dependent temperature. The melting line in the temperature-magnetic field plane lies noticeably below the upper-critical-field line and its location is in quantitative agreement with theoretical predictions without fitting parameters. Finally, we compare the melting behavior of RbEuFe4As4 with other superconducting materials showing that thermal fluctuations of vortices are not as prevalent as in the high-temperature superconducting cuprates, yet they still noticeably influence the properties of the vortex matter.",
author = "Koshelev, {A. E.} and K. Willa and R. Willa and Smylie, {M. P.} and Bao, {J. K.} and Chung, {D. Y.} and Kanatzidis, {M. G.} and Kwok, {W. K.} and U. Welp",
year = "2019",
month = "9",
day = "12",
doi = "10.1103/PhysRevB.100.094518",
language = "English",
volume = "100",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "9",

}

TY - JOUR

T1 - Melting of vortex lattice in the magnetic superconductor RbEuFe4As4

AU - Koshelev, A. E.

AU - Willa, K.

AU - Willa, R.

AU - Smylie, M. P.

AU - Bao, J. K.

AU - Chung, D. Y.

AU - Kanatzidis, M. G.

AU - Kwok, W. K.

AU - Welp, U.

PY - 2019/9/12

Y1 - 2019/9/12

N2 - The iron-based superconductors are characterized by strong fluctuations due to high transition temperatures and small coherence lengths. We investigate fluctuation behavior in the magnetic iron-pnictide superconductor RbEuFe4As4 by calorimetry and transport. We find that the broadening of the specific-heat transition in magnetic fields is very well described by the lowest-Landau-level scaling. We report calorimetric and transport observations for vortex-lattice melting, which is seen as a sharp drop of the resistivity and a step of the specific heat at the magnetic-field-dependent temperature. The melting line in the temperature-magnetic field plane lies noticeably below the upper-critical-field line and its location is in quantitative agreement with theoretical predictions without fitting parameters. Finally, we compare the melting behavior of RbEuFe4As4 with other superconducting materials showing that thermal fluctuations of vortices are not as prevalent as in the high-temperature superconducting cuprates, yet they still noticeably influence the properties of the vortex matter.

AB - The iron-based superconductors are characterized by strong fluctuations due to high transition temperatures and small coherence lengths. We investigate fluctuation behavior in the magnetic iron-pnictide superconductor RbEuFe4As4 by calorimetry and transport. We find that the broadening of the specific-heat transition in magnetic fields is very well described by the lowest-Landau-level scaling. We report calorimetric and transport observations for vortex-lattice melting, which is seen as a sharp drop of the resistivity and a step of the specific heat at the magnetic-field-dependent temperature. The melting line in the temperature-magnetic field plane lies noticeably below the upper-critical-field line and its location is in quantitative agreement with theoretical predictions without fitting parameters. Finally, we compare the melting behavior of RbEuFe4As4 with other superconducting materials showing that thermal fluctuations of vortices are not as prevalent as in the high-temperature superconducting cuprates, yet they still noticeably influence the properties of the vortex matter.

UR - http://www.scopus.com/inward/record.url?scp=85072792390&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072792390&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.100.094518

DO - 10.1103/PhysRevB.100.094518

M3 - Article

AN - SCOPUS:85072792390

VL - 100

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 9

M1 - 094518

ER -