In December 1998 Dr. Jinhua Ye
from the National Research Institute for Metals (NRIM) in Tsukuba,
visited us for three weeks to carry out some high-pressure studies on
Pr-123 high-temperature superconductor. In this photo
you see James Schilling, Jinhua Ye and Sascha Sadewasser standing at
diamond-anvil-cell apparatus in our lab.
In Summer 1999 and 2000 former student Craig Looney, who
Assistant Professor at Merrimack College in North Andover,
returned for several weeks to carry out a series of high-pressure
on high-Tc superconductors using both the diamond-anvil and He-gas
systems. He also spent much time bringing new students up to speed in
In October-December 2000 and October-November 1999 Dr.
Vladimir Tissen, a Senior Research Associate at the ISSP of the Russian
Academy of Sciences in Chernogolovka, came to St. Louis for extended
to carry out high-pressure studies on high-Tc superconductors using our
diamond-anvil cell. Here's a photo.
Dr. Tissen also visited us for one month in 1997 (see list of
Here are two photos photo1
of Vladimir Tissen, Shanti Deemyad, and Takahiro Tomita in December
in front of the Physics buildings. Takahiro has a Master's Degree from
the University of Tokyo and joined Schilling's group in October 2000.
In May 1999 Professor John Mydosh (Kamerlingh Onnes
in Leiden, The Netherlands) paid us a visit. Here is a photo.
In November 2002 Ms. Dinah Parker, a doctoral student in
Steven Bramwell's Chemistry group at the Royal Institution of Great
carried out ac susceptibility studies on samples Cu1-xZnxCr2Se4
which exhibit a sharp ferromagnetic-antiferromagnetic transition for
concentrations near x = 0.9.
In April 2003 former student Anne-Katrin Klehe, her
White, and charming daughter Kaethe-Marie were
in St. Louis for almost three weeks. Anne-Katrin
gave a seminar
on April 14, 2003 and carried out research on organic superconductors on
the He-gas apparatus together with student Takahiro Tomita.
Tissen visited us again for the entire month of April. He
assisted student Shanti Deemyad in research on alkali metal systems
using our diamond-anvil cell.
In April/May 2005 Dr. Vladimir Tissen visited us again. He
suggested that James Hamlin squeeze yttrium metal to as high a pressure
as possible. This ultimately led to an experiment with beveled diamond
anvils where Y's superconducting transition temperature reached the
record value of 20 K at 1.15 Mbar.
In January/March 2007 Takahiro Matsuoka spent three months
in our group carrying
out electrical resistivity measurements to nearly 1 Mbar pressure on
several different systems
of interest. The electrical resistivity in a diamond-anvil cell is a
very difficult technique
which Takahiro was kind enough to teach us during his stay. Takahiro is
currently a graduate
student in Professor Katsuya Shimizu's group in the Center for Quantum
Science and Technology
under Extreme Conditions at Osaka University in Japan. Here is a photo of
Takahiro together with Wenli Bi, James Hamlin, and Mathew Debessai.
In June 2009 James Hamlin returned to Washington
University for two weeks to carry out high-pressure experiments
together with grad students Narelle Hillier and Wenli Bi. After
receiving his Ph.D. degree late in 2007, James joined the group of
Brian Maple at the University of California, San Diego, one of the
preeminent groups in the world in the area of superconductivity.
Besides showing Narelle and Wenli the finer points of diamond-anvil
cell technology, James made a number of valuable suggestions for how we
could further improve the optics in our DAC. Here is a
photo of James together with Narelle and Wenli.
In September 2009 Dr. Vladimir Tissen returned for one
month to search for superconductivity in potassium under pressure. We
deeply regret that Vladimir passed away on
October 16, 2011. He is very much missed.
2011 Dr. Takahiro Matsuoka returned for two months to
carry out resistivity measurements to extreme pressures on Y(Pr) and