Ralph Chamberlin

Phone: 4809653922


PSF 425 TEMPE, AZ 852871504

Mail code: 1504Campus: Tempe

Ralph Chamberlin joined Arizona State University in 1986. He studies the thermal and dynamic properties of materials. His career has shifted between experiments, theory, and computer simulations. He has been involved in developing and interpreting stretchedexponential relaxation for spin glasses, nonresonant spectral hole burning for supercooled liquids, and nanothermodynamics for the thermal and dynamics properties of complex systems on the scale of nanometers. Practical applications of his research include characterizing and controlling excess thermal fluctuations (“hot spots”) in advanced materials, and a basic understanding of how nanometersized thermal fluctuations can cause bits of magnetic memory to forget their alignment.
Ph.D. University of CaliforniaLos Angeles
A practical application of our research is to understand how thermal fluctuations might erase magnetic memory when the recorded bits reach the scale of nanometers. Another application is to explain how nanometersized hot spots occur inside bulk materials. Several experimental techniques have shown that these thermal fluctuations are localized, uncorrelated with neighboring fluctuations, thereby deviating from standard thermodynamics that requires an effectively infinite and homogeneous heat bath. In 1878 Gibbs introduced the chemical potential, which accommodates the thermal energy of individual particles. In 1962 Hill introduced the subdivision potential, which accommodates the thermal energy of individual fluctuations. We find that Hill’s subdivision potential is essential to ensure conservation of energy and maximum entropy during equilibrium fluctuations. We use this “nanothermodynamics” as a guide to develop experiments, theories, and computer simulations. Experiments that we pioneered include: ultrafast SQUID magnetometry, timedomain dielectric spectroscopy, nonresonantspectral hole burning, verticalcantilever force microscopy, and ticklefield electron microscopy. Theories that we develop utilize Hill’s fullyopen nanocanonical ensemble, yielding a mesocopic meanfield theory and local Landau theory for phase transitions. Computer simulations that we investigate include nonlinear corrections to the total energy from changes in local entropy applied to the Ising model, Creutz model, and molecular dynamics. We have shown that nanothermodynamics provides a fundamental foundation for several formulas that have been known empirically for many years, including stretchedexponential relaxation (1854), superArrhenius activation (1921), nonclassical corrections to critical scaling (1893), and 1/f noise (1925). The fundamental goal of our research is to understand these empirical formulas, including commonly measured deviations, using nanoscale corrections to classical thermodynamics and statistical mechanics.
 B. F. Davis, R. V. Chamberlin, 1/f noise from a finite entropy bath: comparison with flux noise from SQUIDs, J. Stat. Mech.: Theory Expt. (2018)
 R. V. Chamberlin, R. Boehmer, R. Richert, Nonresonant spectral hole burning in liquids and solids, in Nonlinear Dielectric Spectroscopy, ed. by R. Richert, Springer (2018)
 R. V. Chamberlin, Reducing lowfrequency noise during reversible fluctuations. Eur. Phys. J. ST (2017)
 R. V. Chamberlin, S. Abe, B. F. Davis, P. E. Greenwood and A. S.H. Shevchuk. Fluctuation theorems and 1/f noise from a simple matrix. Eur. Phys. J B (2016).
 R. V. Chamberlin. The big world of nanothermodynamics. Entropy (2015).
 R. V. Chamberlin and D. M. Nasir. 1/f noise from the laws of thermodynamics for finitesize fluctuations. Physical Review E (2014).
 R. V. Chamberlin and B. F. Davis. Modified BoseEinstein and FermiDirac statistics if excitations are localized on an intermediate length scale: Application to nonDebye specific heat. Physical Review E (2013).
 T. Kim, R. V. Chamberlin, and J. P. Bird. Large Magnetoresistance of NickelSilicide Nanowires: NonEquilibrium Heating of MagneticallyCoupled Dangling Bonds. Nano Letters (2013).
 R. V. Chamberlin. Nanothermodynamics: Smallsystem thermodynamics applied to large systems. Cartolibreria SNOOPY s.n.c.  via Bligny n.27 25133 Brescia (2013).
 R. V. Chamberlin. MonteCarlo simulations including energy from an entropic force. Physica A (2012).
 Y. Shen, R. K. Singh, S. Sanghavi, Y. Wei, R. V. Chamberlin, B. H. Moeckly, J. M Rowell, and N. Newman,. Characterization of Josephson and quasiparticle currents in MgB2/MgB2 and Pb/Pb contact junctions. Superconductor Science & Technology (2010).
 R. V. Chamberlin, J. V. Vermaas, and G. H. Wolf. Beyond the Boltzmann factor for corrections to scaling in ferromagnetic materials and critical fluids. European Physical Journal B (2009).
 R.V. Chamberlin and G. H Wolf. Fluctuationtheory constraint for extensive entropy in MonteCarlo simulations. European Physical Journal B (2009).
 T. Kim, R. V. Chamberlin, P. A. Bennett, and J. P. Bird. Dynamical characteristics of the giant magnetoresistance of epitaxial silicide nanowires. Nanotechnology (2009).
 M. Cardona, R. V. Chamberlin, W. Marx. The history of the stretched exponential function. Annalen der Physik (2007).
 R. V. Chamberlin, N Newman, R Gandikota, R Singh, B Moeckly. Saturation and intrinsic dynamics of fluxons in NbTi and MgB2. Appl. Phys. Lett (2007).
 T Kim, B Naser, R. V. Chamberlin, M Schilfgaarde, P Bennett, J Bird. Large hysteretic magnetoresistance of silicide nanostructures. Physical Review B (2007).
 M Javaheri, R. V. Chamberlin. A freeenergy landscape picture and Landau theory for the dynamics of disordered materials. J. Chem. Phys (2006).
 R. V. Chamberlin. Critical behavior from Landau theory in nanothermodynamic equilibrium. Phys. Lett. A (2003).
 R. V. Chamberlin. Adrian Cho's article on tsallis entropy. SCIENCE (2002).
 R. V. Chamberlin, J Hemberger, A Loidl, K Humfeld, D Farrell, S Yamamuro, Y Ijiri, S Majetich. Percolation, relaxation halt, and retarded van der Waals interaction in dilute systems of iron nanoparticles. PHYSICAL REVIEW B (2002).
 R. V. Chamberlin, K Humfeld, D Farrell, S Yamamuro, Y Ijiri, S Majetich. Magnetic relaxation of iron nanoparticles. JOURNAL OF APPLIED PHYSICS (2002).
 T Hill, R. V. Chamberlin. Fluctuations in energy in completely open small systems. NANO LETTERS (2002).
 R. V. Chamberlin. MeanField Cluster Model for the Critical Behaviour of Ferromagnets. Nature (2000).
 R. V. Chamberlin. Mesoscopic MeanField Theory for Supercooled Liquids and the Glass Transition. Phys. Rev. Lett. (1999).
 R. V. Chamberlin. Nonresonant Spectral Hole Burning in a Spin Glass. Phys. Rev. Lett. (1999).
Courses
2025 Spring
Course Number  Course Title 

PHY 493  Honors Thesis 
PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
2024 Fall
Course Number  Course Title 

PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 799  Dissertation 
PHY 792  Research 
2024 Summer
Course Number  Course Title 

PHY 792  Research 
PHY 792  Research 
2024 Spring
Course Number  Course Title 

PHY 493  Honors Thesis 
PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
2023 Fall
Course Number  Course Title 

PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 799  Dissertation 
2023 Summer
Course Number  Course Title 

PHY 792  Research 
PHY 792  Research 
PHY 499  Individualized Instruction 
2023 Spring
Course Number  Course Title 

PHY 493  Honors Thesis 
PHY 792  Research 
PHY 799  Dissertation 
PHY 584  Internship 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 499  Individualized Instruction 
PHY 799  Dissertation 
2022 Fall
Course Number  Course Title 

PHY 499  Individualized Instruction 
PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 799  Dissertation 
2022 Summer
Course Number  Course Title 

PHY 792  Research 
PHY 792  Research 
2022 Spring
Course Number  Course Title 

PHY 493  Honors Thesis 
PHY 792  Research 
PHY 799  Dissertation 
PHY 584  Internship 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 499  Individualized Instruction 
2021 Fall
Course Number  Course Title 

PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
2021 Summer
Course Number  Course Title 

PHY 792  Research 
PHY 792  Research 
2021 Spring
Course Number  Course Title 

PHY 493  Honors Thesis 
PHY 792  Research 
PHY 799  Dissertation 
PHY 584  Internship 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
2020 Fall
Course Number  Course Title 

PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
2020 Summer
Course Number  Course Title 

PHY 792  Research 
PHY 792  Research 
2020 Spring
Course Number  Course Title 

PHY 333  Electronic Circuits/Measuremnt 
PHY 493  Honors Thesis 
PHY 792  Research 
PHY 799  Dissertation 
PHY 584  Internship 
2019 Fall
Course Number  Course Title 

PHY 792  Research 
PHY 799  Dissertation 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 334  Advanced Laboratory I 
PHY 492  Honors Directed Study 
 Ralph V. Chamberlin. Thermal fluctuations and 1/f noise from nanothermodynamics. StatPhys 26, Lyon. (Jul 2016)
 Ralph V. Chamberlin. Equilibrium response, thermal fluctuations, and 1/f noise from nanothermodynamics. University of Goettingen, University of Augsburg, University of Twente, University of Montpellier, University of Burgundy, University of Barcelona, University of Heidelberg (Jul 2016)
 Ralph V. Chamberlin. Nanothermodynamics and nonlinear corrections to statistical mechanics: 1/f noise and critical scaling. International Workshop on Nonlinearity, Nonequilibrium and Complexity, Mexico City. (Nov 2015)
 Ralph V. Chamberlin. Nanothermodynamics and nonlinear corrections to statistical mechanics using the Ising model. Bradley University. (Oct 2015)
 Ralph V. Chamberlin. Nanothermodynamics: A poorman’s approach to the crossover from classical to quantum behavior. Sandia National Laboratories, Los Alamos National Laboratories. (Aug 2015).
 Ralph V. Chamberlin. Nanothermodynamics and nonlinear corrections to statistical mechanics. Thermodynamics and Nonlinear Dynamics in the Information Age, Telluride (July 2015)
 Ralph V. Chamberlin. A common mechanism for 1/f noise and other forms of slow dynamics. University of Dortmund, University of Roskilde (Jun 2015).
 Ralph V. Chamberlin. A physical foundation for 1/f noise and other forms of slow relaxation. Workshop on Fluctuations, Slow Dynamics, and Internal Time in Complex Critical Systems. Kurashiki, Japan (Mar 2015).
 Ralph V. Chamberlin. The big world of nanothermodynamics. Lorentz Center Workshop on Nanothermodynamics, Leiden Netherlands (Dec 2014).
 Ralph V. Chamberlin. Nanoscale dynamics from maintaining maximum entropy during equilibrium fluctuations. University of Luxembourg (Nov 14)
 Ralph V. Chamberlin. Nanoscale dynamics from maintaining maximum entropy during equilibrium fluctuations. Physics and Materials Science Research Unit Seminar (Nov 2014).
 Ralph V. Chamberlin. Adapting Monte Carlo simulations to obey the laws of thermodynamics on intermediate lengths. Gordon Research Conference on Energetic Materials, Sunday River, Maine (Jun 2014).
 Ralph V. Chamberlin. The big world of nanothermodynamics. Montana State University Physics Colloquium (Oct 2013).
 Ralph V. Chamberlin. The Laws of Thermodynamics and Computer Simulations. Seminar, University of Dortmund, Germany (Jul 2013).
 Ralph V. Chamberlin. Nanothermodynamics: Smallsystem thermodynamics applied to large systems. 12th Joint European Thermodynamics Conference, Brescia, Italy (Jul 2013).
 Ralph V. Chamberlin. Thermodynamic Heterogeneity in Experiments, Theory, and Simulations. Seminar, University of Rostock, Germany (Jun 2013).
 Ralph V. Chamberlin. Thermodynamic Heterogeneity in Experiments, Theory, and Simulations. Seminar, University of Augsburg, Germany (Jun 2013).
 Ralph V. Chamberlin. Specific Heat and Local Equilibrium Temperature Inside Disordered Materials. Seminar, LMU University, Munich, Germany (Jun 2013).
 Ralph V. Chamberlin. Modeling thermodynamic heterogeneity in disordered materials. Seminar in Electrical and Computer Engineering at University of Missouri (Oct 2012).
 Ralph V. Chamberlin. Modeling thermodynamic heterogeneity in disordered materials. Seminar in Physics at the University of Central Florida (Aug 2012).
 Ralph V. Chamberlin. Modeling thermodynamic heterogeneity in disordered materials. NATASNorth American Thermal Analysis Society Meeting (Aug 2012).
 Ralph V. Chamberlin. Can the Canonical Ensemble Give Thermal Equilibrium. Seminar in Chemistry at the University of Missouri (Mar 2012).
 Ralph V. Chamberlin. The stretched exponential: Experiments, theory, and simulations. Department of Chemistry seminar (Nov 2011).
 Ralph V. Chamberlin. Nanothermodynamics and nonlinear corrections to statistical mechanics. Department of physics colloquium (Mar 2011).
 R. V. Chamberlin. Nanothermodynamics and nonlinear corrections to statistical mechanics. Department of Physics Colloquium (Sep 2010).
 R. V. Chamberlin. Nanothermodynamics and Nonlinear Corrections to Statistical Mechanics in Monte Carlo Simulations of Disordered Materials. Viscous Liquids and the Glass Transition (VIII) (May 2010).
 R. V. Chamberlin. Nanothermodynamics and Nonlinear Corrections to Statistical Mechanics. Dynamics Days 2010, Northwestern University (Jan 2010).
 Chamberlin, Ralph. Stretched Exponential Relaxation and Nanothermodynamics. Physics Colloquium (Nov 2007).
 Chamberlin, Ralph. Fluxon Relaxation in Superconductors. APS FourCorners Section Meeting (Oct 2007).
 Chamberlin, Ralph. Stretched Exponential Relaxation and Nanothermodynamics. Physics Colloquium (Apr 2007).
 Chamberlin, Ralph. Nanothermodynamics and the response of disordered materials. Physics Colloquium (Feb 2006).
 Chamberlin, Ralph. Nanothermodynamics in Disordered Materials. APS FourCorners Section Meeting (Oct 2005).
 Chamberlin, Ralph. FreeEnergy Landscape Picture for Dynamics in Disordered Materials. Workshop on Correlated Electrons and Amorphous Materials (Jul 2005).
 Chamberlin, Ralph. Nanothermodynamics and the WilliamsLandelFerry Equation. 76th Annual Meeting of The Society of Rheology (Feb 2005).
 Chamberlin, Ralph. Nanothermodynamics: Experiment, Theory, and Simulation. ASU Soft Matter Seminar (Nov 2004).
 Chamberlin, Ralph. Nanothermodynamics: Experiment, Theory, and Simulation. (Sep 2004).
 Chamberlin, Ralph. Stretched Exponential Relaxation and Nanothermodynamics. (Jul 2004).
 Chamberlin, Ralph. Nanothermodynamics: Experiment, Theory, and Simulation. (Jul 2004).
 Chamberlin, Ralph. Nanothermodynamics: Experiment, Theory, and Simulation. (Jun 2004).
 Chamberlin, Ralph. Stretched Exponential Relaxation and Nanothermodynamics. (May 2004).
 Chamberlin, Ralph. StretchedExponential Relaxation and Nanothermodynamics in Condensed Matter. 4Corners Meeting of the American Physical Society (Oct 2002).
 Chamberlin, Ralph. MeanField Cluster Model for the Thermal and Dynamic Properties of Condensed Matter. Slow Dynamics and Glass Transition (Jan 2002).
 Chamberlin, Ralph. MeanField Cluster Model for the Response of Supercooled Liquids. 4th International Discussion Meeting on Relaxation in Complex Systems (Jun 2001).
 Chamberlin, Ralph. The Big World of Nanothermodynamics. 4th International Discussion Meeting on Relaxation in Complex Systems (Jun 2001).
 Chamberlin, Ralph. Nanothermodynamic Response of Magnetic Materials. March Meeting of the American Physical Society (Mar 2001).
 Chamberlin, Ralph. Nanoscopic Heterogeneities in the Response of Magnetic Materials. The 8 Joint MMMIntermag Conference (Jan 2001).
 Chamberlin, Ralph. Nanoscopic Heterogeneities in the Thermal and Dynamic Behavior of Supercooled Liquids. 220th ACS National Meeting (Aug 2000).
 Chamberlin, Ralph. Mesoscopic MeanField Theory for the Thermal and Dynamic Properties of Condensed Matter. Viscous Liquids and the Glass Transition Søminenstationen (Jun 2000).
 Chamberlin, Ralph. A MeanField Cluster Model for Ferromagnets. March Meeting of the American Physical Society (Mar 2000).
 Arizona Course Equivalency Transfer, Physics, Transfer evaluator for physics (2005  Present)
 Arizona Articulation Task Force, University Representative for Physics (2005  Present)
 Barrett Honors College Faculty Council, Faculty Representative (2005  Present)
 Faculty Honors Disciplinary Advisor, Physics (2004  Present)
 Graduate Exam Committee, Chair (20142017)
 Committee on Committees, Chair (20142016)
 Intel ISEF, Science Fair, Grand Award Judge (2013)
 Engineers Club of the West Valley, Luncheon Meeting Speaker (2012)
 Graduate Program Committee, Associate Chair (2010  2014)
 CLAS Curriculum Committee, Committee member (2008  2010)
 University Standards Committee, Comittee Member (2007  2010)
 Head Undergraduate Advisor, Physics (2000  2004)
 Graduate Program Committee, CoChair (2010  2014)
 American Association of Physics Teachers (AAPT) Physics Department Chairs Conference, Department Representative (2012)
 American Physical Society, Congressional Visit Day participant (2012)
 Springer Verlag, Book reviewer (2011)
 College Board AP Physics, Participant (2011)
 CLAS Curriculum Committee, Committee member (2008  2011)
 CLAS Curriculum Committee, Committee member (2008  2009)
 Danish National Research Foundation, Chair of site visit review panel (2009)
 University Standards Committee, Comittee Member (2007  2009)
 McGraw Hill Publishers, Physics problem writing (2007  2008)
 Committee on Committees, Committee Chair (2006  2008)
 Graduate Student Recruitment, (2007)
 Task force on University Physics, PHY121/131, Committee member (2006  2007)
 CLAS Standards Committee, Chair (2003  2006)
 Barrett Honors College/Science Curriculum Committee, Member (2005  2006)
 Undergraduate Advisor, Physics and Astronomy Advisor (2002  2005)
 Graduate Exam Committee, Chair (2003  2005)
 Space Committee, Committee Member (2004  2005)
 Workshop on Correlated Electrons and Glassy Matter, CoOrganizer (2005)
 Intel International Science and Engineering Fair, AVASC Special Awards Judge (2005)
 Space Committee, Committee Member and convener (2004  2005)
 Personnel Committee, Committee Member (2002  2004)
 AlBalqa' Applied University, Reference for Promotion Evaluation (2003)
 Kyrene de las Manitas Elementary School, Guest Lecturer (2003)
 CLAS Standards Committee, Committee Member (2003)