Infinite-randomness fixed point of the quantum superconductor-metal transitions in amorphous thin films

Nicholas A. Lewellyn, Ilana M. Percher, Jj Nelson, Javier Garcia Barriocanal, Irina Volotsenko, Aviad Frydman, Thomas Vojta, Allen M Goldman

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The magnetic-field-tuned quantum superconductor-insulator transitions of disordered amorphous indium oxide films are a paradigm in the study of quantum phase transitions and exhibit power-law scaling behavior. For superconducting indium oxide films with low disorder, such as the ones reported on here, the high-field state appears to be a quantum-corrected metal. Resistance data across the superconductor-metal transition in these films are shown here to obey an activated scaling form appropriate to a quantum phase transition controlled by an infinite-randomness fixed point in the universality class of the random transverse-field Ising model. Collapse of the field-dependent resistance vs temperature data is obtained using an activated scaling form appropriate to this universality class, using values determined through a modified form of power-law scaling analysis. This exotic behavior of films exhibiting a superconductor-metal transition is caused by the dissipative dynamics of superconducting rare regions immersed in a metallic matrix, as predicted by a recent renormalization group theory. The smeared crossing points of isotherms observed are due to corrections to scaling which are expected near an infinite-randomness critical point, where the inverse disorder strength acts as an irrelevant scaling variable.

Original languageEnglish (US)
Article number054515
JournalPhysical Review B
Volume99
Issue number5
DOIs
StatePublished - Feb 25 2019

Fingerprint

Amorphous films
Superconducting materials
Transition metals
Scaling laws
transition metals
scaling
Thin films
Indium
Oxide films
thin films
Phase transitions
indium oxides
scaling laws
oxide films
Group theory
Ising model
disorders
Isotherms
group theory
Metals

Cite this

Infinite-randomness fixed point of the quantum superconductor-metal transitions in amorphous thin films. / Lewellyn, Nicholas A.; Percher, Ilana M.; Nelson, Jj; Garcia Barriocanal, Javier; Volotsenko, Irina; Frydman, Aviad; Vojta, Thomas; Goldman, Allen M.

In: Physical Review B, Vol. 99, No. 5, 054515, 25.02.2019.

Research output: Contribution to journalArticle

Lewellyn, Nicholas A. ; Percher, Ilana M. ; Nelson, Jj ; Garcia Barriocanal, Javier ; Volotsenko, Irina ; Frydman, Aviad ; Vojta, Thomas ; Goldman, Allen M. / Infinite-randomness fixed point of the quantum superconductor-metal transitions in amorphous thin films. In: Physical Review B. 2019 ; Vol. 99, No. 5.
@article{8991fe8446514b73869069c7e6cca886,
title = "Infinite-randomness fixed point of the quantum superconductor-metal transitions in amorphous thin films",
abstract = "The magnetic-field-tuned quantum superconductor-insulator transitions of disordered amorphous indium oxide films are a paradigm in the study of quantum phase transitions and exhibit power-law scaling behavior. For superconducting indium oxide films with low disorder, such as the ones reported on here, the high-field state appears to be a quantum-corrected metal. Resistance data across the superconductor-metal transition in these films are shown here to obey an activated scaling form appropriate to a quantum phase transition controlled by an infinite-randomness fixed point in the universality class of the random transverse-field Ising model. Collapse of the field-dependent resistance vs temperature data is obtained using an activated scaling form appropriate to this universality class, using values determined through a modified form of power-law scaling analysis. This exotic behavior of films exhibiting a superconductor-metal transition is caused by the dissipative dynamics of superconducting rare regions immersed in a metallic matrix, as predicted by a recent renormalization group theory. The smeared crossing points of isotherms observed are due to corrections to scaling which are expected near an infinite-randomness critical point, where the inverse disorder strength acts as an irrelevant scaling variable.",
author = "Lewellyn, {Nicholas A.} and Percher, {Ilana M.} and Jj Nelson and {Garcia Barriocanal}, Javier and Irina Volotsenko and Aviad Frydman and Thomas Vojta and Goldman, {Allen M}",
year = "2019",
month = "2",
day = "25",
doi = "10.1103/PhysRevB.99.054515",
language = "English (US)",
volume = "99",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - Infinite-randomness fixed point of the quantum superconductor-metal transitions in amorphous thin films

AU - Lewellyn, Nicholas A.

AU - Percher, Ilana M.

AU - Nelson, Jj

AU - Garcia Barriocanal, Javier

AU - Volotsenko, Irina

AU - Frydman, Aviad

AU - Vojta, Thomas

AU - Goldman, Allen M

PY - 2019/2/25

Y1 - 2019/2/25

N2 - The magnetic-field-tuned quantum superconductor-insulator transitions of disordered amorphous indium oxide films are a paradigm in the study of quantum phase transitions and exhibit power-law scaling behavior. For superconducting indium oxide films with low disorder, such as the ones reported on here, the high-field state appears to be a quantum-corrected metal. Resistance data across the superconductor-metal transition in these films are shown here to obey an activated scaling form appropriate to a quantum phase transition controlled by an infinite-randomness fixed point in the universality class of the random transverse-field Ising model. Collapse of the field-dependent resistance vs temperature data is obtained using an activated scaling form appropriate to this universality class, using values determined through a modified form of power-law scaling analysis. This exotic behavior of films exhibiting a superconductor-metal transition is caused by the dissipative dynamics of superconducting rare regions immersed in a metallic matrix, as predicted by a recent renormalization group theory. The smeared crossing points of isotherms observed are due to corrections to scaling which are expected near an infinite-randomness critical point, where the inverse disorder strength acts as an irrelevant scaling variable.

AB - The magnetic-field-tuned quantum superconductor-insulator transitions of disordered amorphous indium oxide films are a paradigm in the study of quantum phase transitions and exhibit power-law scaling behavior. For superconducting indium oxide films with low disorder, such as the ones reported on here, the high-field state appears to be a quantum-corrected metal. Resistance data across the superconductor-metal transition in these films are shown here to obey an activated scaling form appropriate to a quantum phase transition controlled by an infinite-randomness fixed point in the universality class of the random transverse-field Ising model. Collapse of the field-dependent resistance vs temperature data is obtained using an activated scaling form appropriate to this universality class, using values determined through a modified form of power-law scaling analysis. This exotic behavior of films exhibiting a superconductor-metal transition is caused by the dissipative dynamics of superconducting rare regions immersed in a metallic matrix, as predicted by a recent renormalization group theory. The smeared crossing points of isotherms observed are due to corrections to scaling which are expected near an infinite-randomness critical point, where the inverse disorder strength acts as an irrelevant scaling variable.

UR - http://www.scopus.com/inward/record.url?scp=85062562197&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062562197&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.99.054515

DO - 10.1103/PhysRevB.99.054515

M3 - Article

AN - SCOPUS:85062562197

VL - 99

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 5

M1 - 054515

ER -