Publications (77)
Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa$_{2}$Cu$_{3}$O$_{6.95}$ Single Crystal
R. Ocaña, A. Taldenkov, P. Esquinazi +1
Changes in the electrical transport of ZnO under visible light
S. Dusari, J. Barzola-Quiquia, P. Esquinazi +1
Proton-induced magnetic order in carbon: SQUID measurements
J. Barzola-Quiquia, S. Petriconi, P. Esquinazi +4
On the low-field Hall coefficient of graphite
P. Esquinazi, J. Krüger, J. Barzola-Quiquia +3
Hydrogen mediated ferromagnetism in ZnO single crystals
M. Khalid, P. Esquinazi, D. Spemann +2
The role of hydrogen in room-temperature ferromagnetism at graphite surfaces
H. Ohldag, P. Esquinazi, E. Arenholz +4
Comment on "Dirac cones reshaped by interaction effects in suspended graphene" by Elias et al., Nature Physics 7, 701 (2011)
N. GarcÃa, P. Esquinazi, A. A. Pasa
Magnetothermal Conductivity of Highly Oriented Pyrolytic Graphite in the Quantum Limit
R. Ocaña, P. Esquinazi, H. Kempa +2
Strain dependence of the acoustic properties of amorphous metals below 1K: Evidence for the interaction between tunneling states
R. Koenig, M. A. Ramos, I. Usherov-Marshak +3
Andreev reflection measurements in nanostructures with amorphous WC$_x$ superconducting contacts
J. Barzola-Quiquia, M. Ziese, P. Esquinazi +1
The influence of Ga$^+$-irradiation on the transport properties of mesoscopic conducting thin films
J. Barzola-Quiquia, S. Dusari, G. Bridoux +3
Uncompensated magnetization and exchange-bias field in La$_{0.7}$Sr$_{0.3}$MnO$_3$/YMnO$_3$ bilayers: The influence of the ferromagnetic layer
C. Zandalazini, P. Esquinazi, G. Bridoux +3
Spin-filter effect at the interface of magnetic/non-magnetic homojunctions in Li doped ZnO nanostructures
L. Botsch, I. Lorite, Y. Kumar +4
Magnetic order and superconductivity observed in bundles of Double-Wall Carbon Nanotubes
J. Barzola-Quiquia, P. Esquinazi, M. Lindel +3
Negative differential resistance in normal narrow bands - superconducting junctions with Andreev reflection
N. GarcÃa, P. Esquinazi
Comment on ``New Vortex-Matter Size Effect Observed in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$"
Y. Kopelevich, P. Esquinazi
Influence of rhombohedral stacking order in the electrical resistance of bulk and mesoscopic graphite
M. Zoraghi, J. Barzola-Quiquia, M. Stiller +6
Nonlinear ac susceptibility studies of high-$T_c$ rings: Influence of the structuring method and determination of the flux creep exponent
S. Streubel, F. Mrowka, M. Wurlitzer +2
Induced Magnetic Ordering by Proton Irradiation in Graphite
P. Esquinazi, D. Spemann, R. Höhne +3
Angle Dependence of the Transverse Thermal Conductivity in YBa$_2$Cu$_3$O$_7$ single crystals: Doppler Effect vs. Andreev scattering
R. Ocaña, P. Esquinazi
Ferromagnetism in Oriented Graphite Samples
P. Esquinazi, A. Setzer, R. Hoehne +6
Ferromagnetic- and superconducting-like behavior of the electrical resistance of inhomogeneous graphite flake
J. Barzola-Quiquia, P. Esquinazi
Hydrogen-induced ferromagnetism in ZnO single crystals investigated by Magnetotransport
M. Khalid, P. Esquinazi
From Ohmic to Ballistic Transport in Oriented Graphite
N. GarcÃa, P. Esquinazi, J. Barzola-Quiquia +2
On the origin of the electric carrier concentration in graphite
A. Arndt, D. Spoddig, P. Esquinazi +2
Higher harmonics of ac voltage response in narrow strips of YBa2Cu3O7 thin films: Evidence for strong thermal fluctuations
J. G. Ossandon, S. Sergeenkov, P. Esquinazi +1
Experimental Study of the Intrinsic and Extrinsic Transport Properties of Graphite and Multigraphene Samples
J. Barzola-Quiquia, A. Ballestar, S. Dusari +1
Granular superconductivity at room temperature in bulk highly oriented pyrolytic graphite samples
T. Scheike, P. Esquinazi, A. Setzer +1
Photo-enhanced magnetization in Fe-doped ZnO nanowires
I. Lorite, Y. Kumar, P. Esquinazi +7
Vortex Lattice Depinning vs. Vortex Lattice Melting: a pinning-based explanation of the equilibrium magnetization jump
Y. Kopelevich, P. Esquinazi
Conductivity fluctuations in proton-implanted ZnO microwires
B. Dolgin, I. Lorite, Y. Kumar +4
Magnetic properties of polymerized C$_{60}$ with Fe
A. Talyzin, A. Dzwilewski, L. Dubrovinsky +2
Revealing the origin of the vertical hysteresis loop shifts in an exchange biased Co/YMnO$_3$ bilayer
J. Barzola-Quiquia, A. Lessig, A. Ballestar +4
Size Effects in the Magnetoresistance of Graphite: Absence of Magnetoresistance in Micrometer size Samples
J. C. González, M. Muñoz, N. GarcÃa +4
Mean field superconductivity approach in two dimensions: Hydrogen in Graphite
N. GarcÃa, P. Esquinazi
Evidence of defect-induced ferromagnetism in ZnFe$_{2}$O$_{4}$ thin films
C. E. RodrÃguez Torres, F. Golmar, M. Ziese +2
Fabrication and electrical transport properties of embedded graphite microwires in a diamond matrix
J. Barzola-Quiquia, T. Lühmann, R. Wunderlich +6
Experimental Evidence for Two-Dimensional Magnetic Order in Proton Bombarded Graphite
J. Barzola-Quiquia, P. Esquinazi, M. Rothermel +3
Comment on "Quantum Melting of the Quasi-Two-Dimensional Vortex Lattice in $κ-(ET)_2Cu(NCS)_2$"
Y. Kopelevich, P. Esquinazi
Integer Quantum Hall Effect in Graphite
H. Kempa, P. Esquinazi, Y. Kopelevich
Study of the Negative Magneto-Resistance of Single Proton-Implanted Lithium-Doped ZnO Microwires
I. Lorite, C. Zandalazini, P. Esquinazi +14
Comment on: "Revealing common artifacts due to ferromagnetic inclusions in highly oriented pyrolytic graphite", by M. Sepioni, R.R. Nair, I.-Ling Tsai, A.K. Geim and I.V. Grigorieva, EPL 97 (2012) 47001
D. Spemann, M. Rothermel, P. Esquinazi +3
Magnetic properties of carbon phases synthesized using high pressure-high temperature treatment
K. -H. Han, A. Talyzin, A. Dzwilewski +5
Evidence of Josephson-coupled superconducting regions at the interfaces of Highly Oriented Pyrolytic Graphite
A. Ballestar, J. Barzola-Quiquia, P. Esquinazi
$Ï$-Electron Ferromagnetism in Metal Free Carbon Probed by Soft X-Ray Dichroism
H. Ohldag, T. Tyliszczak, R. Hoehne +4
Evidence for semiconducting behavior with a narrow band gap of Bernal graphite
N. GarcÃa, P. Esquinazi, J. Barzola-Quiquia +1
Absence of Metal-Insulator-Transition and Coherent Interlayer Transport in oriented graphite in parallel magnetic fields
H. Kempa, H. C. Semmelhack, P. Esquinazi +1
ZnO:Co Diluted Magnetic Semiconductor or Hybrid Nanostructure for Spintronics?
F. Golmar, M. Villafuerte, A. Mudarra Navarro +4
Large local Hall effect in pin-hole dominated multigraphene spin-valves
P. K. Muduli, J. Barzola-Quiquia, S. Dusari +4
Sample Size Effects on the Transport Characteristics of Mesoscopic Graphite Samples
J. Barzola-Quiquia, J. -L. Yao, P. Rödiger +2
3D-Hydrogen Analysis of Ferromagnetic Microstructures in Proton Irradiated Graphite
P. Reichart, D. Spemann, A. Hauptner +9
Magnetic-Field-Driven Superconductor-Insulator-Type Transition in Graphite
H. Kempa, Y. Kopelevich, F. Mrowka +4
Effect of the sample geometry on the second magnetization peak in single crystalline Ba$_{0.63}$K$_{0.37}$BiO$_3$ thick film
A. Yu. Galkin, Y. Kopelevich, P. Esquinazi +3
Intrinsic Superconductivity at 25 K in Highly Oriented Pyrolytic Graphite
P. Esquinazi, N. GarcÃa, J. Barzola-Quiquia +6
The origin of paramagnetic magnetization in field-cooled YBa2Cu3O7 films
D. A. Luzhbin, A. V. Pan, V. A. Komashko +4
Possible superconductivity in multi-layer-graphene by application of a gate voltage
A. Ballestar, P. Esquinazi, J. Barzola-Quiquia +4
Magnetic order in Graphite: Experimental evidence, intrinsic and extrinsic difficulties
P. Esquinazi, J. Barzola-Quiquia, D. Spemann +5
Searching for a magnetic proximity effect in magnetite-carbon structures
R. Höhne, M. Ziese, P. Esquinazi
Disordered Electrical Potential Observed on the Surface of SiO$_2$ by Electric Field Microscopy
N. GarcÃa, Zang Yan, A. Ballestar +3
Anomalous Hall Effect in Graphite
Y. Kopelevich, J. C. Medina Pantoja, R. R. da Silva +2
Quantum Andreev Oscillations in normal-superconducting-normal nanostructures
P. Rödiger, P. Esquinazi, N. GarcÃa
Metal-Insulator-Metal Transitions, Superconductivity and Magnetism in Graphite
Y. Kopelevich, P. Esquinazi, J. H. S. Torres +4
Length dependence of the resistance in graphite: Influence of ballistic transport
P. Esquinazi, J. Barzola-Quiquia, S. Dusari +1
Trace element content and magnetic properties of commercial HOPG samples studied by ion beam microscopy and SQUID magnetometry
D. Spemann, P. Esquinazi, A. Setzer +1
Ferromagnetic- and Superconducting-like Behavior of Graphite
Y. Kopelevich, P. Esquinazi, J. H. S. Torres +1
Defect-Induced Magnetism in Solids
P. Esquinazi, W. Hergert, D. Spemann +2
Electrostatic Force Microscopy on Oriented Graphite Surfaces: Where Insulating and Conducting Behaviors Coexist
Yonghua Lu, M. Munoz, C. S. Steplecaru +5
Reentrant Metallic Behavior of Graphite in the Quantum Limit
Y. Kopelevich, J. H. S. Torres, R. R. da Silva +3
Ferromagnetism and Superconductivity in Carbon-Based Systems
Y. Kopelevich, P. Esquinazi
A Field-Effect-Transistor from Graphite: No Effect of Low Gate Fields
H. Kempa, P. Esquinazi
Topological Insulator Thin Films Starting from the Amorphous Phase - Bi$_2$Se$_3$ as Example
J. Barzola-Quiquia, T. Lehmann, M. Stiller +3
Enhancement of the ferromagnetic order of graphite after sulphuric acid treatment
J. Barzola-Quiquia, W. Böhlmann, P. Esquinazi +5
Ballistic transport at room temperature in micrometer size multigraphene
S. Dusari, J. Barzola-Quiquia, P. Esquinazi +1
A comparison of the magnetic properties of Proton- and Iron-implanted graphite
J. Barzola-Quiquia, R. Höhne, M. Rothermel +3
Induced Magnetic Order by Ion Irradiation of Carbon-Based Structures
P. Esquinazi, R. Höhne, K. -H. Han +5
Can doping graphite trigger room temperature superconductivity? Evidence for granular high-temperature superconductivity in water-treated graphite powder
T. Scheike, W. Böhlmann, P. Esquinazi +3
Field-induced metal-insulator Field-induced metal-insulator transition in the c-axis resistivity of graphite
H. Kempa, P. Esquinazi, Y. Kopelevich