Thickness-tuned Superconductor-to-Insulator Transitions under magnetic field in a-NbSi

Abstract

We have studied the thickness-induced superconductor-to-insulator transition in the presence of a magnetic field for a-NbSi thin films. Analyzing the critical behavior of this system within the "dirty boson model", we have found a critical exponents product of ${\nu }_{d}z$ > 0.4. The corresponding phase diagram in the (H,d) plane is inferred. This small exponent product as well as the non-universal value of the critical resistance found at the transition call for further investigations in order to thoroughly understand these transitions.

arXiv comment7 pages, 7 figures, to be published in PRB

References in corpus (16)

• Continuous Quantum Phase Transitions
• On the existence of a Bose Metal at T=0
• Thickness-Magnetic Field Phase Diagram at the Superconductor-Insulator Transition in 2D
• Observation of the Nernst signal generated by fluctuating Cooper pairs
• Two New Vortex Liquids
• Superconductivity in the insulating phase above the field-tuned superconductor-insulator transition in disordered indium oxide films
• Possible field-tuned SIT in high-Tc superconductors: implications for pairing at high magnetic fields
• Magnetic field-induced quantum superconductor-insulator transition in $N{b}_{0.15}S{i}_{0.85}$
• A length scale for the superconducting Nernst signal above T${}_c$ in Nb${}_{0.15}$Si${}_{0.85}$
• The Field-Tuned Superconductor-Insulator Transition with and without Current Bias
• Superconductor-Insulator Transition in a Capacitively Coupled Dissipative Environment
• Scaling analysis of the magnetic-field-tuned quantum transition in superconducting amorphous In-O films
• Nernst effect in the phase-fluctuating superconductor InO${}_x$
• A unifying model for several two-dimensional phase transitions
• Suppression of 2D superconductivity by the magnetic field: quantum corrections vs superconductor-insulator transition
• Electric Field Effect in Ultrathin Films near the Superconductor-Insulator Transition

Cited by in corpus (16)

• The Nernst effect and the boundaries of the Fermi liquid picture
• Quantum phase slip interference device based on superconducting nanowire
• Superinsulator-Superconductor Duality in Two Dimensions
• Nernst effect as a probe of superconducting fluctuations in disordered thin films
• Nernst effect in the phase-fluctuating superconductor InO${}_x$
• Superconductor to weak-insulator transitions in disordered Tantalum Nitride films
• Effect of annealing on the superconducting properties of a-Nb(x)Si(1-x) thin films
• Quantum criticality at the superconductor insulator transition probed by the Nernst effect
• Homogeneous superconducting phase in TiN film : a complex impedance study
• Quantum phase transition in two-dimensional NbN superconducting thin films
• AC Measurement of the Nernst effect of thin films at low temperatures
• Destruction of superconductivity in disordered materials : a dimensional crossover
• Deficiency of the scaling collapse as an indicator of a superconductor-insulator quantum phase transition
• Vanishing Hall Conductance in the Phase Glass Bose Metal at Zero Temperature
• Multiple Quantum Phase Transitions at the superconducting LaTiO3/SrTiO3 interface
• Proximitized insulators from disordered superconductors