Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2)

P. Walmsley; C. Putzke; Liam D Malone; Isabel Guillamon Gomez; D. Vignolles; C. Proust; S. Badoux; A. I. Coldea; M. D. Watson; S. Kasahara; Y. Mizukami; T. Shibauchi; Y. Matsuda; A. Carrington

doi:10.1103/PhysRevLett.110.257002

Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2)

P. Walmsley^*
, C. Putzke
, Liam D Malone
, Isabel Guillamon Gomez
, D. Vignolles
, C. Proust
, S. Badoux
, A. I. Coldea
, M. D. Watson
, S. Kasahara
, Y. Mizukami
, T. Shibauchi
, Y. Matsuda
, A. Carrington

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

114 Citations (Scopus)

Abstract

We report a combined study of the specific heat and de Haas-van Alphen effect in the iron-pnictide superconductor BaFe2(As1-xPx)(2). Our data when combined with results for the magnetic penetration depth give compelling evidence for the existence of a quantum critical point close to x = 0.30 which affects the majority of the Fermi surface by enhancing the quasiparticle mass. The results show that the sharp peak in the inverse superfluid density seen in this system results from a strong increase in the quasiparticle mass at the quantum critical point.

Original language	English
Article number	257002
Number of pages	5
Journal	Physical Review Letters
Volume	110
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.110.257002
Publication status	Published - 21 Jun 2013

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Normal and superconducting state electronic structure of iron based superconductors
Carrington, A. (Principal Investigator)
1/09/10 → 1/09/14
Project: Research

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Walmsley, P., Putzke, C., Malone, L. D., Guillamon Gomez, I., Vignolles, D., Proust, C., Badoux, S., Coldea, A. I., Watson, M. D., Kasahara, S., Mizukami, Y., Shibauchi, T., Matsuda, Y., & Carrington, A. (2013). Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2). Physical Review Letters, 110(25), Article 257002. https://doi.org/10.1103/PhysRevLett.110.257002

@article{548a8f2fca7143c9af3ccb470f8d16a1,

title = "Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2)",

abstract = "We report a combined study of the specific heat and de Haas-van Alphen effect in the iron-pnictide superconductor BaFe2(As1-xPx)(2). Our data when combined with results for the magnetic penetration depth give compelling evidence for the existence of a quantum critical point close to x = 0.30 which affects the majority of the Fermi surface by enhancing the quasiparticle mass. The results show that the sharp peak in the inverse superfluid density seen in this system results from a strong increase in the quasiparticle mass at the quantum critical point.",

author = "P. Walmsley and C. Putzke and Malone, \{Liam D\} and \{Guillamon Gomez\}, Isabel and D. Vignolles and C. Proust and S. Badoux and Coldea, \{A. I.\} and Watson, \{M. D.\} and S. Kasahara and Y. Mizukami and T. Shibauchi and Y. Matsuda and A. Carrington",

year = "2013",

month = jun,

day = "21",

doi = "10.1103/PhysRevLett.110.257002",

language = "English",

volume = "110",

journal = "Physical Review Letters",

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Walmsley, P, Putzke, C, Malone, LD, Guillamon Gomez, I, Vignolles, D, Proust, C, Badoux, S, Coldea, AI, Watson, MD, Kasahara, S, Mizukami, Y, Shibauchi, T, Matsuda, Y & Carrington, A 2013, 'Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2)', Physical Review Letters, vol. 110, no. 25, 257002. https://doi.org/10.1103/PhysRevLett.110.257002

TY - JOUR

T1 - Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2)

AU - Walmsley, P.

AU - Putzke, C.

AU - Malone, Liam D

AU - Guillamon Gomez, Isabel

AU - Vignolles, D.

AU - Proust, C.

AU - Badoux, S.

AU - Coldea, A. I.

AU - Watson, M. D.

AU - Kasahara, S.

AU - Mizukami, Y.

AU - Shibauchi, T.

AU - Matsuda, Y.

AU - Carrington, A.

PY - 2013/6/21

Y1 - 2013/6/21

N2 - We report a combined study of the specific heat and de Haas-van Alphen effect in the iron-pnictide superconductor BaFe2(As1-xPx)(2). Our data when combined with results for the magnetic penetration depth give compelling evidence for the existence of a quantum critical point close to x = 0.30 which affects the majority of the Fermi surface by enhancing the quasiparticle mass. The results show that the sharp peak in the inverse superfluid density seen in this system results from a strong increase in the quasiparticle mass at the quantum critical point.

AB - We report a combined study of the specific heat and de Haas-van Alphen effect in the iron-pnictide superconductor BaFe2(As1-xPx)(2). Our data when combined with results for the magnetic penetration depth give compelling evidence for the existence of a quantum critical point close to x = 0.30 which affects the majority of the Fermi surface by enhancing the quasiparticle mass. The results show that the sharp peak in the inverse superfluid density seen in this system results from a strong increase in the quasiparticle mass at the quantum critical point.

U2 - 10.1103/PhysRevLett.110.257002

DO - 10.1103/PhysRevLett.110.257002

M3 - Article (Academic Journal)

C2 - 23829753

SN - 0031-9007

VL - 110

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 257002

ER -

Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe2(As1-xPx)(2)

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Projects

Normal and superconducting state electronic structure of iron based superconductors

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