1k citations · 4.5k across the 71 of their papers we have counts for
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Doubling of the superconducting transition temperature in ultra-clean wafer-scale aluminum nanofilms
Ching-Chen Yeh, Thi-Hien Do, Pin-Chi Liao +12
Superconducting properties of thin films can be vastly different from those of bulk materials. Seminal work has shown the critical temperature Tc of elemental superconductors decre…
Skyrmion-(Anti)Vortex Coupling in a Chiral Magnet-Superconductor Heterostructure
A. P. Petrović, M. Raju, X. Y. Tee +9
We report experimental coupling of chiral magnetism and superconductivity in [IrFeCoPt]/Nb heterostructures. The stray field of skyrmions with radius ~50nm is sufficient to nucleat…
Insulator to Metal Transition in WO Induced by Electrolyte Gating
X. Leng, J. Pereiro, J. Strle +8
Tungsten oxide and its associated bronzes (compounds of tungsten oxide and an alkali metal) are well known for their interesting optical and electrical characteristics. We have mod…
Reentrant Phase Coherence in Superconducting Nanowire Composites
D. Ansermet, A. P. Petrović, S. He +8
The short coherence lengths characteristic of low-dimensional superconductors are associated with usefully high critical fields or temperatures. Unfortunately, such materials are o…
A disorder-enhanced quasi-one-dimensional superconductor
A. P. Petrović, D. Ansermet, D. Chernyshov +6
A powerful approach to analysing quantum systems with dimensionality involves adding a weak coupling to an array of one-dimensional (1D) chains. The resultant quasi-one-dimen…
Interfacial effects revealed by ultrafast relaxation dynamics in BiFeO/YBaCuO bilayers
D. Springer, Saritha K. Nair, Mi He +6
The temperature dependence of the relaxation dynamics in the bilayer thin film heterostructure composed of multiferroic BiFeO (BFO) and superconducting YBaCuO$_{7…
Two types of superconducting domes in unconventional superconductors
Tanmoy Das, Christos Panagopoulos
Uncovering the origin of unconventional superconductivity is often plagued by the overwhelming material diversity with varying normal and superconducting (SC) properties. In this a…
Ferroelectricity in underdoped La-based cuprates
Z. Viskadourakis, S. S. Sunku, S. Mukherjee +4
Doping a parent antiferromagnetic Mott insulator in cuprates leads to short-range electronic correlations and eventually to high-Tc superconductivity. However, the nature of charge…
The Vortex Signature of Discrete Ferromagnetic Dipoles at the LaAlO/SrTiO Interface
A. P. Petrović, A. Paré, T. R. Paudel +7
A hysteretic in-plane magnetoresistance develops below the superconducting transition of LaAlO/SrTiO interfaces for 0.15 T, independently of the ca…
Bi-quadratic magnetoelectric coupling in underdoped La_2CuO_{4+x}
S. Mukherjee, B. M. Andersen, Z. Viskadourakis +2
The recent discovery of relaxor ferroelectricity and magnetoelectric effect in lightly doped cuprate material La_2CuO_{4+x} has provided a number of questions concerning its theore…
Theory of the magnetoeletric effect in a lightly doped high-Tc cuprate
S. Mukherjee, B. M. Andersen, Z. Viskadourakis +2
In a recent study Viskadourakis et al. discovered that extremely underdoped La_2CuO_(4+x) is a relaxor ferroelectric and a magnetoelectric material at low temperatures. It is furth…
Interface superconductivity: History, development and prospects
Juan Pereiro, Alexander Petrovic, Christos Panagopoulos +1
The concept of interface superconductivity was introduced over 50 years ago. Some of the greatest physicists of that time wondered whether a quasi-two-dimensional (2D) superconduct…
Low-temperature ferroelectric phase and magnetoelectric coupling in the underdoped La_2CuO_(4+x)
Z. Viskadourakis, I. Radulov, A. P. Petrović +9
We report the discovery of a ferroelectric ground state below 4.5 K in highly underdoped La_2CuO_(4+x) accompanied by slow charge dynamics which develop below T~40 K. An anisotropi…
Nernst effect and diamagnetic response in a stripe model of superconducting cuprates
Ivar Martin, C. Panagopoulos
We examine the possibility that the experimentally observed enhancement of superconducting (SC) fluctuations above the SC transition temperature in the underdoped cuprates is cause…
Effect of hole doping on the London penetration depth of Bi:2212 and Bi(Y):2212
W. Anukool, S. Barakat, C. Panagopoulos +1
We report measurements of AC susceptibility and hence the in-plane London penetration depth on the same samples of Bi:2212 and Bi(Y):2212 for many values of the planar hole concent…
Micro-Raman evidence for topological charge order across the superconducting dome of La_{2-x)SrxCuO4
D. Lampakis, E. Liarokapis, C. Panagopoulos
The doping dependence of the micro-Raman spectra of high quality La_{2-x}Sr_xCuO_4 microcrystals with x=0.0-0.45 has been investigated in the region 10-300 K. The phonon at ~100 cm…
Lattice effects in the LaSrCuO compounds
E. Liarokapis, E. Siranidi, D. Lampakis +2
Systematic Raman studies on several cuprates (YBaCuO, YBaCuO or BiSrCaCuO) have…
Thermo-magnetic hysteretic properties resembling superconductivity in the normal state of La1.85Sr0.15CuO4
M. Majoros, C. Panagopoulos, T. Nishizaki +1
We have performed detailed magnetic and thermal hysteresis experiments in the normal-state magnetization of La1.85Sr0.15CuO4 single crystal. Using a combination of in-field and in-…
Magnetic order in the normal state of the archetypal high-Tc superconductor La2-xSrxCuO4
C. Panagopoulos, M. Majoros, T. Nishizaki +1
We report detailed bulk magnetization measurements of the normal state in the high transition temperature (high-Tc) superconductor La2-xSrxCuO4. A magnetic order in the form of hys…
Superfluid response in monolayer high-Tc cuprates
C. Panagopoulos, T. Xiang, W. Anakool +3
We have studied the doping dependence of the in-plane and out-of-plane superfluid density, ρ^s(0), of two monolayer high-Tc superconductors, HgBa_2CuO_{4+δ} and La_{2-x}Sr_xCuO_4,…
The superfluid density in cuprate high-Tc superconductors - a new paradigm
J. L. Tallon, J. W. Loram, J. R. Cooper +2
The doping dependence of the superfluid density, r_s, of high-Tc superconductors is usually considered in the context of the Uemura relation, namely Tc proportional to rs, which is…
Microscopic Hamiltonian for Zn or Ni substituted high temperature cuprate superconductors
T. Xiang, Y. H. Su, C. Panagopoulos +2
We have derived the effective low energy Hamiltonian for Zn or Ni substituted high-T_c cuprates from microscopic three-band models consisting of the most relevant Cu or impurity 3d…
Critical Behaviour in the Spin Fluctuations and Superfluid Density of LaSrCuO
C. Panagopoulos, B. D. Rainford, J. R. Cooper +2
We study the doping dependence of low frequency spin fluctuations and the zero-temperature superfluid density of LaSrCuO using the muon spin relaxation (SR) and…
Effects of doping on thermally excited quasiparticles in the high- superconducting state
T. Xiang, C. Panagopoulos
The physical properties of low energy superconducting quasiparticles in high- superconductors are examined using magnetic penetration depth and specific heat experimental dat…