Meet the Experts

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Thierry Debuisschert >

Expert Scientist | Thales Research & Technology 
Coordinator | EU Quantum Flagship project ASTERIQS

Dr. Debuisschert´s research focuses on nonlinear optics, lasers, tunable laser sources, quantum cryptography and NV centers in diamond. He has been both coordinator and contributor to numerous research projects at French and European level, among others DIADEMS and ASTERIQS, that have gathered prominent European laboratories and industrial partners involved in the development of NV quantum sensors. He is currently Chair of the Science & Engineering Board of the Quantum Flagship and he has played a major role in creating the Strategic Research Agenda presented to the European Commission by the Strategic Advisory Board in 2020. Debuisschert has authored over 50 publications, has supervised more than 15 students and has served in several scientific boards. 

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Christian Degen >

Professor | ETH Zurich

Prof. Degen´s research focuses on novel magnetic sensing and imaging techniques in nanoscale research. He employs ultrasensitive mechanical sensors, such as cantilevers and membranes, as well as quantum sensors based on defect spins in diamond (NV centers). Some of Degen´s main contributions are the invention of scanning NV magnetometry (NVM) in 2008, as well as pioneering experiments in magnetic resonance force microscopy (MRFM), leading to applications in high sensitivity, high resolution magnetic imaging of memory materials and devices and biomolecules. In 2017, Degen co-founded QZabre LLC, a spin-off company dedicated to fabricating diamond NV center probes and bringing NVM solutions to the market.

In his research, Christian Degen is using an attoAFM/CFM microscope in a dilution refrigerator for scanning magnetic imaging experiments at millikelvin temperatures.

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Hans Josef Hug >

Lab Head | Empa - Swiss Federal Labs for Materials Science and Technology
Professor | University of Basel

Prof. Hug´s research focuses on nanoscale materials science, particularly on thin magnetic films, as well as on atomic and molecular nanosystems on surfaces. The emphasis is put on the continuous development of new experimental methods in scanning probe microscopy to explore nanoscale magnetism. His main contributions include first ever magnetic imaging of vortices in high-Tc superconductors by MFM, domains in ultra-thin magnetic films, the development of quantitative MFM techniques to measure the magnetic stray fields, for example from single skyrmions quantitatively or to determine the local areal density of pinned uncompensated spins in exchange bias systems. 

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Vincent Jacques >

Professor | University of Montpellier 

Prof. Jacques´ research interests cover several fundamental and applied topics related to the applications of artificial atoms in quantum technologies. Such topics include quantum optics, spin physics, and quantum sensing with the development of highly-sensitive magnetometers based on NV defects in diamond. He has published more than 80 papers in international journals. Jacques´ main contribution is the development of scanning NV magnetometry and its applications to tackle open questions in condensed matter physics. 

In his research, Vincent Jacques is using an attoAFM/CFM microscope in an attoLIQUID1000 cryostat for magnetic imaging.

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John Kirtley >

Scanning SQUID Guru
www.kirtleyscientific.com

John Kirtley started his research focusing on electron tunneling, imaging techniques and noise in superconductors and semiconductors. Later on, he has developed the technique of scanning SQUID microscopy and used the resulting novel instruments for numerous fundamental studies in condensed matter physics. His main contribution is the elucidation of the orbital symmetry of the pairing function in high-temperature superconductors: using scanning SQUID imaging, Kirtley demonstrated d-wave pairing symmetry with the half-integer flux quantum effect in the cuprate high-temperature superconductors. Kirtley has authored over 200 publications.

During his post at Stanford University, Kirtley was in charge of the Stanford SQUID Microscope User Facility, which utilizes an attocube scanning SQUID platform in an attoLIQUID1000 cryostat.

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Patrick Maletinsky >

Professor | University of Basel
Chief Scientific Officer and co-founder | qnami AG

Prof. Maletinsky´s research is focusing on the use of individual quantum systems as sensing devices, as well as on their application to challenges in mesoscopic and nanoscale physics, in particular to nanoscale magnetic field sensing. His research has significantly advanced the field of NV magnetometry (NVM) and has led to numerous key publications in quantum sensing over the last years. His main contributions include nanoscale magnetic imaging down to the level of single electron spins, the first application of NVM to imaging superconductor vortices and the first applications of NVM to technologically very promising field of antiferromagnetic spintronics and van der Waals magnets. In 2017 Maletinsky co-founded qnami, a spin-off company dedicated to fabricating diamonds with NV centers and bringing full NVM solutions to the market.

In his research, Patrick Maletinsky is using an attoAFM/CFM microscope in an attoLIQUID1000 cryostat for magnetic imaging at cryogenic temperatures.

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Kathryn Ann Moler >

Vice Provost and Dean of Research | Stanford University
Co-chair | National Quantum Initiative Advisory Committee

Prof. Moler conducts research in magnetic imaging, develops tools that measure nanoscale magnetic fields, and studies quantum materials and devices. Her main contributions include  testing several theoretical models of high-temperature superconductivity, probing the dynamics of individual vortices in many materials, and elucidating the coexistence of superconductivity and magnetism through highly sensitive local imaging. She has authored over 100 publications. 

Among other honors, Moler received a national Presidential Early Career Award for Scientists and Engineers, held a Packard Fellowship for Science and Engineering, received the William L. McMillan Award “for her fundamental studies of the superconducting pairing state, Josephson vortices, and the role of interlayer coupling in high-temperature superconductors”. Moler was elected a Fellow of the American Physical Society in 2008. Due to her expertise in both quantum physics and leadership, Kathryn Ann Moler is since 2020 co-chairing the National Quantum Initiative Advisory Committee - a body that advises the President of the United States on ways to ensure American leadership in quantum science.

The Moler lab, beside several home-built scanning SQUID microscopes, hosts an attocube scanning SQUID platform in an attoLIQUID1000 cryostat.

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Stuart Parkin >

Director | Max Planck Institute of Microstructure Physics
Professor | Martin Luther University Halle-Wittenberg

Prof. Parkin´s research focuses on spintronics - a field of research to which he has made many major contributions. His work on spin-dependent transport in magnetic multilayers led to his discoveries of the universality of giant magnetoresistance in many transition metal and noble metal multilayers including room temperature effects in copper-based multilayers, the interfacial origin of giant magnetoresistance, and long-range interlayer oscillatory coupling, that allowed for his invention of the synthetic antiferromagnet.  These discoveries of his led to his invention and development of highly  innovative read-heads for computer hard disks, which in turn enabled a 1000-fold increase in the storage capacity of magnetic hard disks in little more than a decade.

These same discoveries are used even today in recording read heads whose physics has switched from spin-dependent scattering to spin-dependent tunneling, the latter using materials he invented and demonstrated in 2001-2004.  In 1995, Parkin with colleagues at IBM Research proposed the concept of a non-volatile magnetic random access memory using magnetic tunneling junctions. This technology has finally mainstream applications since 2019. His current research interest comprises energy‐efficient data storage technologies based on the racetrack memory devices. Parkin has authored over 600 publications and holds 120 patents.

In his research Stuart Parkin is using an attoAFM I microscope with attoMFM upgrade in an attoLIQUID2000 cryostat for magnetic imaging.

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Ruslan Prozorov >

Professor | Iowa State University
Senior Physicist | Ames Laboratory

Prof. Prozorov is broadly interested in superconducting and magnetic quantum materials, focusing on the interplay between superconductivity and magnetism, pattern formation, meso- and nanoscale science, as well as quantum phase transitions and quantum criticality. Prozorov's group is known for unique experimental techniques, such as visualization of magnetic fields using Faraday and Kerr magneto-optical effects as well as NV centers in diamond, anisotropic transport in detwinned samples, and ultra-precise measurements of London penetration depths in superconductors for which he was elected a Fellow of the American Physical Society in 2011. Prozorov's notable contributions include the first experimental evidence of d-wave superconductivity in electron-doped cuprates and the discovery of topological hysteresis in type-I superconductors.

Ruslan Prozorov uses an attoAFM/CFM microscope in an attoLIQUID1000 cryostat for quantum sensing of small magnetic fields.

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Samuel Seddon >

PhD Student (Marin Alexe Group) | University of Warwick

Seddon's research interests comprise ferroelectric and multiferroic functional materials, in particular complex oxides, with focus on exploring the correlation between nanoscale magnetic domains in ultrathin magnetic films and bulk electrical properties of these materials. In such pursuits Seddon relies on cryogenic MFM.

He is the expert user of the attocube system in the Marin Alexe Group which consists of an attoAFM I microscope with attoMFM upgrade and an attoLIQUID2000 cryostat.

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Jan Seidel >

Professor | University of New South Wales
Research Director | School of Materials Science and Engineering UNSW

Prof. Seidel’s primary research interest involves the synthesis and characterization of functional materials, with a focus on ferroelectric and multiferroic oxides, halide perovskites and novel ferroic van der Waals materials. His labs host a wide variety of advanced scanning probe microscopy systems to study fundamental electronic, optical, mechanical and magnetic properties at the nanoscale, especially those associated with interfaces and various topological structures such as domain walls, skyrmions, vortices, etc., to which he has made pioneering contributions.

In his research, Jan Seidel is using an attoAFM I microscope with attoMFM upgrade in an attoDRY1000 cryostat for magnetic imaging.

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Jian Shen >

Professor and Head of the Department of Physics | Fudan University 
Director | State Key Lab for Surface Physics & Institute of Nanoelectronics and Quantum Computing

Prof. Shen´s research comprises surface emerging phenomena in reduced dimensionality and at nanoscale. In his research, Shen puts focus on electric and magnetic properties of complex oxides and nanoparticles with emphasis on both underlying physical mechanism and applications. He has published about 100 publications. Shen has written 10 review articles on low-dimensional magnetism for Surface Science, Surface Science Report, and J. Phys. Condens. Matter. He has given over 100 invited talks at international conferences including APS, AVS, MRS, MMM, Intermag and ICM. Shen was elected a Fellow of the American Physical Society in 2011.

In his research, Jian Shen is using an attoAFM I microscope with attoMFM upgrade in an attoDRY1000 cryostat for magnetic imaging.

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Jörg Wrachtrup >

Director | 3rd Physics Institute, University of Stuttgart
Fellow | Max Planck Institute for Solid State Research

Prof. Wrachtrup´s research interest focuses on various aspects of solid state physics and nanoscience with emphasis on quantum sensing. He carried out the first electron spin resonance experiments on single electron spins, where he combined optical excitation of single molecules with spin resonance techniques in order to achieve the required sensitivity and selectivity. This optically detected magnetic resonance (ODMR) is based on spin-dependent optical selection rules. Wrachtrup also carried out the first detection of optical as well as the spin signal of a single dopant atom in a solid. This dopant was a nitrogen atom joined by a vacancy; the nitrogen vacancy (NV) center in diamond. This pioneering work has laid the ground for plethora of research on individual NV centers aiming at applications in magnetometry and quantum registry. Wrachtrup also demonstrated usability of NV centers in measuring electric fields and temperature.

In his research, Jörg Wrachtrup is using an attoAFM/CFM microscope in an attoLIQUID1000 cryostat for magnetic imaging at cryogenic temperatures.

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Eli Zeldov >

Professor | Weizmann Institute of Science
Head | Braun Center for Submicron Research & Gruber Center for Quantum Electronics

Prof. Zeldov´s research focuses on semiconductors and superconductors, with applications of the later in improving scanning probing imaging techniques (SPM). His most notable contribution is the invention of the World´s smallest and most sensitive SQUID device that resides on the apex of sharp pipette, thus forming the optimal geometry for SPM. These SQUID-on-tip devices provide the means for investigating local magnetic, electric and thermal phenomena in novel states of matter. Zeldov has published about 200 publications and holds 10 patents.

Eli Zeldov builds his own scanning probe microscopes for cryogenic magnetic imaging. He has built in several attocube components into his systems: various attocube low-temperature positioners and two ASC500 scan controllers.


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Mirko Bacani

Product Manager Cryogenic Instruments | attocube systems 

Dr. Bacani´s research interest focuses on novel functional materials and methods of their characterization, combining fundamental and applicative approach. Strong emphasis is put on scanning probe microscopy of magnetic thin films. His main contributions include first experimental verification of the Fogler-Teber-Shklovskii theory, development of a method for quantitative characterization of skyrmions in interlayers, development of frequency-modulated distance control in MFM, and correlating skyrmions with topological Hall effect. Bacani also started a collaboration between Empa and a high-end Swiss timepieces manufacturer.

In his role of the product manager for cryogenic instruments, Bacani is combining his technical expertise with communication and management skills. By being in close contact with attocube customers and strategic partner companies, as well as by observing trends and requirements of low-temperature physics and materials science, he is in charge of improving existing attocube products, evaluating customization requests and developing strategies for future attocube products. attocube is thus always ready to understand the needs at the forefront of low-temperature magnetic imaging, and bring suitable solutions to the market.

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Khaled Karrai

Scientific Director and co-founder | attocube systems 
Professor | Ludwig Maximilian University of Munich

Prof. Karrai´s expertize comprises ultra-precision positioning, scanning probe microscopy, interferometric sensing, and cryogenics. His main contributions includes pioneering the field of magneto-optics of high-Tc superconductors, developing cryogenic scanning near-field optical microscopy and inventing the now-widely-used tuning-fork tip sample distance sensing for AFM topographic imaging. He pioneered resonant high-spectral resolution and spatial laser spectroscopy techniques of single semiconductor quantum dots, which opened the path to quantum optics of quantum dots-based systems. He also pioneered the first intrinsic laser cooling of micro-mechanical and nano-mechanical systems, opening the path to quantum ground-state cooling of macroscopic systems.

The key technology basis of his scientific work are the inventions he developed on ultra-high precision positioning instrumentation adapted to operate under cryogenic and high magnetic field environment. Karrai authored over 200 publications and holds over 20 patents, a number of which are key to attocube’s business.

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Florian Otto

Manager Business Sector Cryogenic Instruments | attocube systems

Florian Otto wrote his master's equivalent thesis "Exploration of the flow field around an oscillating sphere using 3D particle tracking velocimetry" at Wesleyan University, and graduated at the University of Regensburg in 2005. The thesis involved building a full particle tracking velocimetry setup based on high speed digital cameras including a flow chamber and software from scratch. This research helped to understand self-organization of granular particles vibrated in a fluid through direct observation of the repulsive and attractive parts of a steady streaming flow generated around each particle.
 
During his PhD, he has been working on nonlinear vortex transport in mesoscopic channels of amorphous NbGe, which shed new light on the understanding of the transversal flux transformer effect in special situations, where the interplay of the Lorentz force, the Nernst effect via local heating, and the force due to a local suppression of the superconducting gap leads to abrupt sign reversals of the nonlocal vortex motion.