Congrats to Prof. Rzchowski on his retirement!

Posted on June 9, 2025

Mark Rzchowski

Congrats to Prof. Mark Rzchowski who has announced his retirement, effective January 17! Rzchowski is a condensed matter experimentalist who joined the department as an assistant professor in 1992 and has been a full professor since 2004. He served as Associate Chair for Undergraduate Program and Academic Affairs from 2008-10 and again from 2011-24.

When Rzchowski arrived to UW–Madison, high-temperature superconductivity had recently been discovered, and his early research largely centered on that topic, focusing on novel measurements of their fundamental physical properties.

“But I soon moved in different directions, collaborating with Chang-Beom Eom, a new faculty member in materials science and engineering expert in thin film growth,” Rzchowski recalls. “He had been working in superconductivity but had been branching out into some new systems, and we moved together in those directions.”

Rzchowski and Eom have collaborated for over two decades now, pairing forefront growth and manipulation of crystalline thin films with state-of-the art measurement approaches. Their collaboration has resulted in over 70 co-authored papers largely focused on quantum correlations and topologies in complex oxide thin-film materials. In spintronics, a technology that takes advantage of the intrinsic quantum spin state of an electron to substitute spin currents for the charge currents in “elec”tronics, they developed an all-thin-film membrane-based system that demonstrated an intrinsic coupling between voltage and spin. This helped to address a persistent problem in spintronics, namely better controlling magnetism at the nanoscale: the extreme thinness of the material allows low operating voltages to control the spin properties.

In another spintronics study in 2023, Rzchowski and Eom demonstrated uniquely oriented thin films of oxide crystals that controls the natural symmetry of the crystals, allowing them to produce vastly more useful spin currents — a critical step forward in advancing next-gen computer memory devices.

“I am so lucky to have known Mark — as a collaborator, colleague, and friend,” Eom says. “His brilliance as a scientist and kindness as a person will stay with me. I wish him happiness and fulfillment in the years ahead and I hope to continue sharing the joys of life for many years.”

two men stand in front of lab equipment — Chang Beom-Eom (left), a professor of materials science and engineering, and Mark Rzchowski, a professor of physics, in the lab. Photo: Joel Hallberg.

In 2022, Rzchowski was elected a Fellow of the American Physical Society for “pioneering discoveries and understanding of physical principles governing correlated complex materials and interfaces, including superconductors, correlated oxide systems multiferroic systems, and spin currents in noncollinear antiferromagnets.” He was nominated by the Division of Materials Physics.

Rzchowski has provided decades of service to the department, some of this time as associate chair. In this role, he led the redevelopment of several of the large courses, for example hiring course coordinators to provide consistency. He also was largely involved in the overhaul of algebra-based Physics 103 and 104, supported by the provost’s REACH initiative. REACH is designed to give students as many chances as possible to actively engage with physics principles and ideas, and to collaborate in group settings. An assessment of the program’s implementation showed a significant increase in concept mastery in these . He has represented the department at conferences presenting the REACH implementation and analysis of learning outcomes.

In March 2020, Rzchowski successfully led the transition of every course to all-online instruction when the Covid-19 pandemic abruptly sent everyone off campus, then to hybrid online/in-person instruction as students slowly returned. More recently, he helped leverage what was learned from those semesters into offering the summer session of Physics 103, and, now this year, Physics 104, as fully online courses. These online offerings have more than tripled summer enrollments — both UW–Madison students as well as visiting students.

Rzchowski was also chair of the department’s space committee in the early 2000s and oversaw the design of new laboratory and office space in Chamberlin Hall, and the transition from Sterling Hall to Chamberlin .

Prof. Emerit Bob Joynt, who overlapped with Rzchowski as associate chair when Joynt served as department chair from 2011-2014, says: “I worked closely with Mark Rzchowski for over 30 years. Of all my colleagues, he was the one whose advice I valued most, and the one who could most be trusted to follow through on everything he ever promised (which was a lot). He was not only a talented researcher, but he also was very generous with his time for the department, particularly the teaching program. He always did the jobs that were the most needed, usually those that were also the most thankless. So now, one last time, thank you Mark!”

Prof. Mark Eriksson, who served as department chair from 2021-2024, also overlapping with Rzchowski’s tenure as associate chair, says: “Mark Rzchowski made many contributions during his career in teaching research and service. In this last category for many years Mark served in the essential role of Associate Chair for Academic Affairs in which he solved — semester after semester — the complex riddle of matching instructors to courses in an optimal way.

— By Sarah Perdue, department of physics. Adam Malecek and Jason Daley of the College of Engineering contributed to this story

Congrats to Prof. Joynt on his retirement!

Posted on July 31, 2023

37 years after joining the faculty of the department of physics at the University of Wisconsin–Madison, Prof. Bob Joynt has announced his retirement at the end of July.

Joynt is a condensed matter theorist who began as an assistant professor in 1986. His early work focused largely on superconductivity, including high temperature superconductors. He also played an important role in better understanding the Quantum Hall effect, dating back to his graduate work and continuing here. After a decade and a half, his career took a fortuitous turn when he wrote a quantum computing grant proposal with physics professor Mark Eriksson and other researchers in engineering.

Prof. Bob Joynt

“That was really a pivotal point in my career, and I’ve been doing quantum computing mostly ever since,” Joynt recalls. “Change is good, I found. I enjoyed that change and I’m glad I did it.”

His work for the past 20 years has mainly focused on understanding the origins of noise and decoherence in quantum systems and in the design of semiconductor structures for quantum computing. Joynt is a fellow of the American Physical Society and a UW–Madison Romnes Faculty Fellow. He has co-authored over 175 peer-reviewed publications and trained 26 doctoral students, in addition to numerous postdocs and MS Physics–Quantum Computing students.

Joynt’s academic and research achievements alone comprise an illustrious career that any retiring professor would likely be happy with. Still, his contributions to the department span so much more.

Joynt served as department chair from 2011-2014, for which he focused his efforts on department fundraising. He was responsible for starting the Board of Visitors, a group of people, mostly in industry, with strong ties to the department. The BoV advises and assists on department priorities, plays a leading role in fundraising, and provides a professional network for current students and alumni. From 2017-2022, Joynt additionally served as the department’s Associate Chair for Alumni Relations and the Board of Visitors.

a man stands near a white board looking at an unpictured audience. He is holding a wood pointer in his right hand and gesturing with his left hand. — Prof. Joynt lectures in this undated photo from earlier in his career

Around 2016, Joynt noted that doctoral students with quantum computing research experience were in such high demand that employers were often entering bidding wars for them. Was there a way to meet the demands of the quantum computing workforce by training students in a year or two? And so, thanks to Joynt’s vision and persistence, the MS in Physics–Quantum Computing program — the first MS in quantum computing in the U.S. — enrolled its first cohort in Fall 2019.

“We take about 25-30 PhD students each year, and now we take about the same number of MSQPC students,” Joynt says. “It’s become a big part of the department’s educational program.”

Adds Mark Eriksson, Department Chair and John Bardeen Professor of Physics: “Our department’s MSPQC program was the first in the nation and remains a model for others, thanks to Professor Joynt’s vision and energy.”

The department boasts the oldest hands-on science museum in the country — a claim we now feel confident making thanks to Joynt’s extensive research on the history of the Ingersoll Physics Museum for its 100^th anniversary in 2018. The museum and physics outreach in general have always been important to Joynt. He has served in an informal capacity as faculty lead for the museum for several years now, helping to raise funds and ensure the museum fulfills its mission of providing free, hands-on, inquiry-based exhibits.

When asked what he wanted to be remembered for in the department, Joynt reflected on lessons from his career and then looked forward: “My advice to the department is: do new things. Don’t be afraid of change. Science changes, education changes, all these things are changing, and you need to change with them.”

Joynt’s retirement is official as of July 31, but he emphasizes that he is only retiring from administrative and teaching duties. He plans to continue his research efforts, sometimes in Madison and often abroad.

Mark Friesen, a senior scientist and long-time collaborator of Joynt’s, says he looks forward to continuing to work with Joynt in this new stage of his career, adding:

“When I joined the department, I knew Bob through reputation as one of the bright condensed matter physicists of his generation. I feel very fortunate to have worked with him, first as a mentor, and later as a colleague. Bob has a tremendous intuition for condensed matter that spans far beyond his immediate research efforts. He also has an easy-going and gracious style that draws in collaborators, and he is just fun to interact with, both inside and outside the department.”

Congratulations to Professor Lawler on his retirement!

Posted on May 16, 2022

After 42 years on the UW–Madison faculty, Jim Lawler, the Arthur and Aurelia Schawlow Professor of Physics, has announced his retirement. Lawler is an atomic, molecular & optical physicist with a focus developing and applying laser spectroscopic techniques for determining accurate absolute atomic transition probabilities. His retirement is official as of May 22.

“What we’ve really done gradually over four-plus decades is make atomic spectroscopy more quantitative so that people can use it to really learn the detailed physics and chemistry of the remote universe,” Lawler says.

Lawler received his MS (’74) and PhD (’78) from this department, studying with now-professor emeritus Wilmer Anderson. In the two years after earning his doctorate, he was a research associate at Stanford University, and returned to UW–Madison as an assistant professor in 1980.

“There was a little bit of a disadvantage to come back to a place where I had recently been as a student,” Lawler says. “But I knew I would get extremely good graduate students and I would have access to a lot of infrastructure, and that combination really drew me back.”

He had extremely good graduate students and postdocs. Lawler supervised 26 PhD students and 10 terminal MS students. Those students and postdocs have gone on to prestigious National Research Council Fellowships, group lead positions at major companies, and tenured professorships, amongst many others.

Lawler served as department chair from 1994-1997. He also accumulated numerous awards and honors over his distinguished career. He is a fellow of the American Physical Society, the Optical Society of America, the U.K. Institute of Physics, and in 2020 he was elected a Legacy Fellow of the inaugural class of American Astronomical Society Fellows. He won the 1992 W. P. Allis Prize of the American Physical Society and the 1995 Penning Award from the International Union of Pure and Applied Physics for research in plasma physics, the two highest National and International Awards in the field of Low Temperature Plasma Physics. In 2017, he won Laboratory Astrophysics Prize of the American Astronomical Society for research in spectroscopy.

Longtime collaborator Blair Savage, UW–Madison professor emeritus of astronomy, says:

“Jim’s work in laboratory astrophysics provided extremely important atomic ultraviolet transition probabilities in support of the Hubble Space Telescope programs to determine elemental abundances of gaseous matter in the interstellar medium from three different ultraviolet spectrographs over the 32-year history of the space observatory. They included the Goddard High Resolution Spectrograph, the Space Telescope Imaging Spectrograph and the Cosmic Origins Spectrograph.”

And Wilmer Anderson, Lawler’s doctoral advisor, says:

“He was a very good graduate student, and he of course has turned out to be a really great scientist and colleague. His lifetime measurements on atomic physics played a key role in understanding the neutron star collisions. I’m sorry to see him retiring but I’m sure that he will leave a legacy behind that’s really fantastic. It’s going to be a big loss to the department not to have him around.”

Lawler has collaborated with his AMO colleagues over the years, but in more of an intellectual capacity than in research. As he notes, much of AMO is headed in the quantum information and quantum computing direction, with public and private funding helping to drive it. Still, he does not see AMO headed solely in the quantum direction.

“Decades from now the currently Hot areas of physics will be less glamorous, but those stars are still going to be light years away,” Lawler says. “I think the connection of astronomy and spectroscopy — the way we learn about the physics and chemistry of the remote universe — is strong enough that it will survive. And helping make spectroscopy in astronomy more quantitative is what we’ve done that will have some lasting significance.”

Congratulations to Professor Sue Coppersmith on her retirement!

Posted on February 26, 2021

With the best of wishes — and some sadness — the Department of Physics says “Happy Retirement” to Professor Sue Coppersmith. Her last day at UW–Madison was February 14.

Coppersmith, the Robert E. Fassnacht Professor of Physics, joined the department in 2001. Prior to coming to UW–Madison, she earned her Ph.D. from Cornell University, conducting her thesis work at Bell Labs. She completed a postdoc at Brookhaven National Lab, then worked at Bell Labs for eight years before joining the faculty at the University of Chicago.

Sue Coppersmith

During her tenure here, she served as Department Chair for one three-year term, and earned recognition as a Fellow of the National Academy of Sciences, the American Academy of Arts and Sciences, the American Association for the Advancement of Science, and the American Physical Society.

Scientific Achievements

At UChicago, Coppersmith’s research focused on soft matter physics and non-linear dynamics, work that she continued at UW–Madison, primarily with Prof. Pupa Gilbert. But her research program largely shifted over the years into quantum computing, an area that was just getting started when she started in Madison..

“At the time, I would tell people what we were doing, and of course nothing was working yet, and people would say, ‘Well, that’s all crap, isn’t it?’” Coppersmith recalls. “So, it was really fun to go from a time where there was nothing working, to now we have qubits, and being a part of the effort and feeling like I was helping.”

Coppersmith describes herself as a theorist who went into the lab every day to better understand the experimental side of quantum computing, And, she says, UW–Madison stands out as one of the universities where theory and experiment are so closely tied together. Here, she frequently collaborated with Prof. Mark Eriksson and Distinguished Scientist Mark Friesen.

“She just comes up with a lot of ideas, and what matters most is how many of them are home runs. She had an unusually large number,” Eriksson says. “She came up with the idea for a brand new qubit, the quantum dot hybrid qubit, and we’re still working on it to this day in my lab. And other people around the world have picked it up.”

Friesen adds:

“As a researcher, Sue is highly intuitive and focused more on the high-level physical picture rather than specific technical details. She typically breaks a problem down to a ‘minimal model’ that captures its basic physics. She has studied a wide variety of problems in her career, for which she is highly respected in many different communities, and she is able to apply lessons learned from one area to another. Her memory is legendary! She is also known for her quickness, both in being able to understand a problem (and how it fits into the big picture) and being able to immediately respond to it. I also say this in a good way: she is not shy about expressing her opinions.”

Legacy as Department Chair

Perhaps equal to her scientific achievements is the mark Coppersmith made on the department during her time as Chair, from 2005-08. The Department was hiring three faculty positions, and she reasoned that if eight offers were made, at worst four people would accept.

“But eight people came! And I was famous for it because I ruined the College’s budget,” Coppersmith says. “I think this is the highlight of my Chair career. I loved recruiting people.”

There are a number of factors that go into faculty candidates accepting or not accepting offers, but Eriksson is certain that Coppersmith‘s ability to recruit was a significant one.

“They came in large part because Sue understood and was able to get them to explain and she was able to hear what they really needed, and then go deliver on it,” Eriksson says. “It’s one thing to have any subset of those skills, but she has the whole package.”

Current Department Chair Sridhara Dasu credits Coppersmith with shaping the direction of the department in all areas of physics, adding, “Her tenure continues to be an inspiration for all chairs of the department who followed her.”

five people stand in the foreground with a mountain in the background in Rio de Janeiro — Sue with a group of close collaborators from around the world, at a meeting that she arranged in Rio de Janeiro.

Mentorship of students and colleagues

Coppersmith’s mentorship of junior colleagues and students will also be missed. Both Friesen and Susan Nossal, senior scientist and director of the Physics Learning Center, noted that Coppersmith’s support has been crucial to their success as researchers in the department. They both applauded her as a champion of women and girls in science, citing her participation – with Nossal, Gilbert and several graduate students – in the annual Expanding Your Horizons event at which middle school girls participate in fun, hands-on science activities.

“As a mentor, she is highly dedicated to her students and colleagues,” says Friesen, who co-advised several students with Coppersmith. “For me personally, she has been very supportive of my career path, helping me to obtain promotions and advancements, and providing on-point advice.”

Adds Nossal: “As a scientist, you have your ups and downs, and she helped me through some of the downs. It’s always helpful to have people who believe in you, and she helped me in persisting as a scientist.”

Looking forward

Between Coppersmith and everyone else mentioned in this piece, there were certainly plenty of stories that could be shared. But for now, we’ll let emeritus professor Lou Bruch sum up Coppersmith’s tenacity and well-placed ambition with this anecdote:

“Sue touted the usefulness of the Mathematica package and would at times get into competition on speed of getting to the answer — her using the package and me using ad hoc analyses. I recall only one instance where I won.”

Coppersmith may be retired from UW–Madison, but she is not retiring from science. She is currently Professor and Head of the School of Physics at the University of New South Wales in Australia, where she will continue her research and collaborations with colleagues here and around the world.

“Wisconsin was so good to me. The people are so nice, and we did good work,” Coppersmith says. “I like to feel that I contributed in a positive way. I’ll always be grateful.”