Publications
Outcomes from hard work
We report our results in scientific articles, book chapters and Ph.D. thesis.
"*" denotes equal contribution in the authorship .
Journal articles
2024
Detection of electron paramagnetic resonance of two electron spins using a single NV center in diamond
Yuhang Ren and Susumu Takahashi
APL Quantum 1, 046108 (2024). [doi] [arXiv]
2023
Probing NV and SiV charge state dynamics using high-voltage nanosecond pulse and photoluminescence spectral analysis
Artur Pambukhchyan, Sizhe Weng, Indu Aravind, Stephen B. Cronin and Susumu Takahashi
Mater. Quantum. Technol. 3, 035005 (2023). [doi]
2022
Numerical simulations for ferromagnetic resonance of nano-size island structures probed by radio-frequency scanning tunneling microscopy
Y. Sato, M. Haze, H. Yang, K. Asakawa, S. Takahashi, Y. Hasegawa
Jpn. J. Appl. Phys. 61, 025001 (2022). [doi] [].
Ultrahigh nitrogen-vacancy center concentration in diamond
Sándor Kollarics, Ferenc Simon, András Bojtor, Kristóf Koltai, Gergely Klujber, Máté Szieberth, Bence Gábor Márkus, Dávid Beke, Katalin Kamarás, Ádám Gali, Diego Amirari, Robert Berry, Salime Boucher, Dmitriy Gavryushkin, Gunnar Jeschke, Jason P. Cleveland, Susumu Takahashi, Péter Szirmai, László Forró, Eve Emmanouilidou, Rishabh Singh, Károly Holczer
2021
Electron-electron double resonance detected NMR spectroscopy using ensemble NV centers at 230 GHz and 8.3 Tesla
B. Fortman, L. Mugica-Sanchez, N. Tischler, C. Selco, Y. Hang, K. Holczer and, S. Takahashi
J. Appl. Phys. 130, 083901 (2021) - special topic collection, titled "Materials, Methods and Applications of Color Centers with Accessible Spin" [doi] [arXiv].
2020
2019
DNP-NMR of surface hydrogen on silicon microparticles
D. Shimon, K. J. van Schooten, S. Paul, Z. Peng, S. Takahashi, W. Kockenberger, C. Ramanathan
Solid State Nucl. Magn. Reson. 101, 68 (2019) [doi].
2018
Demonstration of Fidelity Improvement Using Dynamical Decoupling with Superconducting Qubits
B. Pokharel, N. Anand, B. Fortman and D. Lidar
Phys. Rev. Lett. 121, 220502 (2018); [link].
2017
Review - Single spin magnetic resonance spectroscopy using a nitrogen-vacancy center in diamond (Japanese)
S. Takahashi
Kotaibutsuri May issue, 15 (2017); [link].
Investigation of coherence time of a nitrogen-vacancy center in diamond created by a low energy nitrogen implantation
C. Abeywardana, Z. Peng, L. C. Mugica, E. Kleinsasser, K.-M. C. Fu and S. Takahashi
Appl. Mag. Res. 48, 571-577 (2017); [doi].
2016
Electron spin resonance spectroscopy of small ensemble paramagnetic spins using a single nitrogen-vacancy center in diamond
C. Abeywardana, V. Stepanov, F. H. Cho and S. Takahashi
J. Appl. Phys. 120, 123907 (2016); [doi].
Determination of nitrogen spin concentration in diamond using double electron-electron resonance
V. Stepanov and S. Takahashi
Phys. Rev. B 94, 024421 (2016); [doi].
High-frequency electron paramagnetic resonance spectroscopy of nitroxide-functionalized nanodiamonds in aqueous solution
R. D. Akiel, V. Stepanov and S. Takahashi
Cell Biochem. Biophys. 75, 151-157 (2016); [doi].
Investigating functional DNA grafted on nanodiamond surface using site-directed spin labeling and electron paramagnetic resonance spectroscopy
R. D. Akiel, X. Zhang, C. Abeywardana, V. Stepanov, P. Z. Qin and S. Takahashi
J. Phys. Chem. B 120, 4003-4008 (2016); [doi].
Spin coherence in a Mn3 single-molecule magnet
C. Abeywardana, A. M. Mowson, G. Christou, and S. Takahashi
Appl. Phys. Lett. 108, 042401 (2016); [doi].
2015
230/115 GHz electron paramagnetic resonance/double electron-electron resonance spectroscopy
F. H. Cho,* V. Stepanov,* C. Abeywardana and S. Takahashi
Methods Enzymol. 563, 95 (2015); [doi].
High-frequency and high-field optically detected magnetic resonance of nitrogen-vacancy centers in diamond
V. Stepanov, F. H. Cho, C. Abeywardana and S. Takahashi
Appl. Phys. Lett. 106, 063111 (2015); [doi].
2014
Magnetic resonance spectroscopy using a single nitrogen-vacancy center in diamond
C. Abeywardana,* V. Stepanov,* F. H. Cho and S. Takahashi
Proc. SPIE 9269, 92690K (2014); [doi].
A high-frequency electron paramagnetic resonance spectrometer for multi-dimensional, -frequency and -phase pulsed measurements
F. H. Cho, V. Stepanov and S. Takahashi
Rev. Sci. Instrum. 85, 075110 (2014); [doi].
Low temperature synthesis and characterization of Lanthanide-doped BaTiO3 nanocrystals
S. P. Culver, V. Stepanov, M. Mecklenburg, S. Takahashi and R. L. Brutchey
Chem. Commun. 50, 3480 (2014); [doi].
2013
Grafting nitroxide radicals on nanodiamond surface using click chemistry
E. E. Romanova, R. Akiel, F. H. Cho and S. Takahashi
J. Phys. Chem. A 117, 11933 (2013); [doi].
Spin decoherence and electron spin bath noise of a nitrogen-vacancy center in diamond
Z.-H. Wang and S. Takahashi
Phys. Rev. B 87, 115122 (2013); [doi].
2012
Pulsed electron paramagnetic resonance spectroscopy powered by a free-electron laser
S. Takahashi, L.-C. Brunel, D. T. Edwards, J. van Tol, G. Ramian, S. Han & M. S. Sherwin
Nature 489, 409-413 (2012); [doi].
Media releases:
"Laser helps scientists ‘see' the smallest world" - USC
"Scientists Employ a Powerful UCSB Laser to Breathe New Life into an Old Technology for Studying Atomic-Level Structures" - UC Santa Barbara
Distance measurements across randomly distributed nitroxide probes from the temperature dependence of the electron spin phase memory time at 240 GHz
D. T. Edwards, S. Takahashi, M. S. Sherwin and S. Han
J. Mag. Res. 223, 198-206 (2012); [doi].
2011
Decoherence in Crystals of Quantum Molecular Magnets
S. Takahashi, I. S. Tupitsyn, J. van Tol, C. C. Beedle, D. N. Hendrickson, and P. C. E. Stamp
Nature 476, 76 (2011); [doi].
Media releases:
"USC Scientists Contribute to a Breakthrough in Quantum Computing" - USC
"Researchers Develop Quantum Computing System that Resists ‘Quantum Bug'" - UC Santa Barbara
"Discovery may overcome obstacle for quantum computing: UBC, California researchers" - University of British Columbia
2009
Cavity dumping of an injection-locked free-electron laser
S. Takahashi, G. Ramian, and M. S. Sherwin
Appl. Phys. Lett. 95, 234102 (2009); [doi].
Coherent Manipulation and Decoherence of S=10 Single-Molecule Magnets
S. Takahashi, J. van Tol, C. C. Beedle, D. N. Hendrickson, L.-C. Brunel, and M. S. Sherwin
Phys. Rev. Lett. 102, 087603 (2009); [doi].
High-Field Phenomena of Qubits
J. van Tol, G. W. Morley, S. Takahashi, D. R. McCamey, C. Boehme, M. E. Zvanut
Appl. Mag. Res. 36, 259 (2009)
2008
Quenching Spin Decoherence in Diamond through Spin Bath Polarization
S. Takahashi, R. Hanson, J. van Tol, M. S. Sherwin and D. D. Awschalom
Phys. Rev. Lett. 101, 047601 (2008); [doi].
Chosen as PRL editor’s suggestions, highlighted in Physics Synopses “Quantum Coherence in Cold Baths
Large Mn25 Single-Molecule Magnet with Spin S=51/2: Magnetic and High-Frequency Electron Paramagnetic Resonance Spectroscopic Characterization of a Giant Spin State
M. Murugesu, S. Takahashi, A. Wilson, K. A. Abboud, W. Wernsdorfer, S. Hill, G. Christou
Inorg. Chem. 47, 9459 (2008)
Pulsed EPR spectrometer with injection-locked UCSB free-electron laser
S. Takahashi, D.G. Allen, J. Seifter, G. Ramian,M.S. Sherwin,J. van Tol,L.-C. Brunel
Infrared Phys. Tech. 55, 426 (2008) [doi]
2007
Submegahertz linewidth at 240 GHz from an injection-locked free-electron laser
S. Takahashi, G. Ramian, M. S. Sherwin, L.-C. Brunel and J. van Tol
Appl. Phys. Lett. 91, 174102 (2007); [doi]
A diffraction-compensating 0-25 ns free space terahertz delay line for coherent quantum control
D. G. Allen, L. Persechini, S. Takahashi, G. Ramian and M. S. Sherwin
Rev. Sci. Instrum. 78, 113103 (2007) [doi]
The UCSB MM-FEL Injection Locking System
G. Ramian, S. Takahashi and M. S. Sherwin
Proceeding of FEL 2007, Novosibirsk, Russia (2007)
2006
Are Lebed’s magic angles truly magic?
S. Takahashi, A. Betancur-Rodiguez, S. Hill, S. Takasaki, J. Yamada and H. Anzai
J. Low Temp. Phys. 142 Nos. 3/4, 311 (2006)
Study of non-magnetic impurity effects of the organic superconductor (TMTSF)2ClO4
S. Takahashi, S. Hill, S. Takasaki, J. Yamada and H. Anzai
AIP Conference Proceedings 850, 619 (2006)
2005
Periodic-orbit resonance in the quasi-1D organic superconductor (TMTSF)2ClO4
S. Takahashi, S. Hill, S. Takasaki, J. Yamada and H. Anzai
Phys. Rev. B 72, 024540 (2005) [doi]
A rotating cavity for high-field angle-dependent microwave spectroscopy of low-dimensional conductors and magnets
S. Takahashi and Stephen Hill
Rev. Sci. Instrum. 76, 023114 (2005) [doi]
Angle-resolved mapping of the Fermi velocity in quasi-two-dimensional conductors and superconductors: probing quasiparticles in nodal superconductors
S. Takahashi and Stephen Hill
J. Appl. Phys. 97, 10B106 (2005)
Fermi surface studies of quasi-1D and quasi-2D organic superconductors using periodic orbit resonances in high magnetic fields
S. Takahashi, A. E. Kovalev, S. Hill, S. Takasaki, J. Yamada, H. Anzai, J. S. Qualls, K. Kawano, M. Tamura, T. Naito and H. Kobayashi
Int. J. Mod. Phys. B 18 Nos. 27-29, 3499-3504 (2004)
Also in Proc. Int. Conf. on High Magnetic Field in Semiconductor Physics (SemiMag 16), Y. J. Wang, L. Engel and N. Bonesteel (eds.)
World Scientific, Singapore (2005); IBSN: 981-256-290-7
A comparison between high-symmetry Mn12 single-molecule magnets in different ligand/solvent environments
S. Hill, N. Anderson, A. Wilson, S. Takahashi, K. Petukhov, N. E. Chakov, M. Murugesu, J. M. North, E. del Barco, A. D. Kent, N. S Dalal, and G. Christou
Polyhedron 24, 2280 (2005)
A spectroscopic comparison between several high-symmetry S = 10 Mn12 single-molecule magnets
S. Hill, N. Anderson, A. Wilson, S. Takahashi, N. E. Chakov, M. Murugesu, J. M. North, N. S. Dalal, and G. Christou
J. Appl. Phys. 97, 10M510 (2005)
2004
Discrete easy-axis tilting in Mn12-acetate, as determined by EPR: implications for the magnetic quantum tunneling mechanism
S. Takahashi, R. S. Edwards, J. M. North, S. Hill and N. S. Dalal
Phys. Rev. B 70, 094429 (2004) [doi]
Temperature dependence of the Josephson plasma resonance between vortex phases in the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2
D. K. Benjamin, S. Takahashi, S. Hill and J. S. Qualls
Solid State Comm. 131, 719 (2004)
High field high frequency EPR techniques and their application to single molecule magnets
R. S. Edwards, S. Hill, P. Goy, R. Wylde and S. Takahashi
Physica B 346-347, 211 (2004)
2003
Effect of an in-plane magnetic field on the interlayer phase coherence in the extreme-2D organic superconductor κ-(BEDT-TTF)2Cu(NCS)2
A. E. Kovalev, S. Takahashi, S. Hill and J. S. Qualls
Int. J. Mod. Phys. B 17 Nos. 18-20, 3547 (2003)
Periodic orbit resonance in (TMTSF)2ClO4
A. E. Kovalev, S. Hill, S. Takahashi, T. N. Dhakal, S. Takasaki, J. Yamada H. Anzai and J. S. Brooks
J. Appl. Phys. 93, 8665 (2003)
Book chapters
Microwave spectroscopy of Q1D and Q2D organic conductors
S. Hill and S. Takahashi
in The Physics of Organic Superconductors and Conductors, A. G. Lebed (eds.), Springer, New York (2008) [ISBN: 978-3-540-76667-4] [condmat/0608490]
Ph.D theses
L. Mugica (2023) - Diamond surface chemistry for NV quantum sensing
B. Fortman (2022) - Development of high-frequency and high-magnetic field optically detected magnetic resonance
Z. Peng (2021) - High-frequency electron-electron double resonance techniques and applications
C. Abeywardana (2017) - Development of nanoscale EPR using a single nitrogen-vacancy center in diamond
V. Stepanov (2017) - High-Frequency and High-Field Magnetic Resonance Spectroscopy of Diamond
R. Akiel (2016) - Functionalization of Nanodiamond Surface for Magnetic Sensing Application
F. H. Cho (2015) - Development of high-frequency EPR spectromenter and investigation of paramagnetic impurities and defects in diamond