Bosonic Confinement and Coherence in Disordered Nanodiamond Arrays
- 13 November 2017
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 11 (11), 11746-11754
- https://doi.org/10.1021/acsnano.7b07148
Abstract
In the presence of disorder, superconductivity exhibits short-range characteristics linked to localized Cooper pairs which are responsible for anomalous phase transitions and the emergence of quantum states such as the bosonic insulating state. Complementary to well-studied homogeneously disordered superconductors, superconductor-normal hybrid arrays provide tunable realizations of the degree of granular disorder for studying anomalous quantum phase transitions. Here, we investigate the superconductor–bosonic dirty metal transition in disordered nanodiamond arrays as a function of the dispersion of intergrain spacing, which ranges from angstroms to micrometers. By monitoring the evolved superconducting gaps and diminished coherence peaks in the single-quasiparticle density of states, we link the destruction of the superconducting state and the emergence of bosonic dirty metallic state to breaking of the global phase coherence and persistence of the localized Cooper pairs. The observed resistive bosonic phase transitions are well modeled using a series–parallel circuit in the framework of bosonic confinement and coherence.Funding Information
- Engineering and Physical Sciences Research Council
- Vedeck? Grantov? Agent?ra M?VVa? SR a SAV (VEGA 1/0409/15, VEGA 2/0149/16)
- European Regional Development Fund (ITMS 26220120005)
- Deutsche Forschungsgemeinschaft (SFB917)
- Vlaamse Overheid
- Fonds Wetenschappelijk Onderzoek
- Agent?ra na Podporu V?skumu a V?voja (APVV-0036-11, APVV-14-0605)
This publication has 39 references indexed in Scilit:
- High voltage breakdown (1.8 kV) of hydrogenated black diamond field effect transistorApplied Physics Letters, 2016
- Novel Thermal Management of GaN Electronics: Diamond SubstratesPublished by ASME International ,2015
- Global and Local Superconductivity in Boron‐Doped Granular DiamondAdvanced Materials, 2013
- Role of grain size in superconducting boron-doped nanocrystalline diamond thin films grown by CVDPhysical Review B, 2011
- The Diamond Superconducting Quantum Interference DeviceACS Nano, 2011
- Superconducting group-IV semiconductorsNature Materials, 2009
- Superconducting diamond: an introductionPhysica Status Solidi (a), 2008
- Superconductivity in diamond thin films well above liquid helium temperatureApplied Physics Letters, 2004
- Superconductivity in diamondNature, 2004
- Diamond thin films: a 21st-century materialPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2000