15th International Conference on Muon Spin Rotation, Relaxation and Resonance

Session

Student Day

STD

28 Aug 2022, 09:30

Aula dei Cavalieri, University Central Palace, via Università 12

Conveners

Student Day: Tutorial

• Mark Telling (STFC)
• Adam Berlie (Science and Technology Facilities Council)

Student Day: Student Talks I

• Adam Berlie (Science and Technology Facilities Council)
• Mark Telling (STFC)

Student Day: Student Talks II

• Mark Telling (STFC)
• Adam Berlie (Science and Technology Facilities Council)

Student Day: Student Talks III

• Mark Telling (STFC)
• Adam Berlie (Science and Technology Facilities Council)

338. Introduction (STD-0)

Prof. Roberto De Renzi (University of Parma)

28/08/2022, 09:30

Oral

330. Introduction to muon spin spectroscopy (STD-1)

Francis Pratt (STFC)

28/08/2022, 09:35

Oral

331. Computational techniques to support muon science (STD-2)

Leandro Liborio (Scientific Computing Department, Rutherford Appleton)

28/08/2022, 10:00

Oral

332. Instrumentation for muon spectroscopy (STD-3)

Dr Thomas Prokscha (PSI)

28/08/2022, 10:25

Oral

339. Discussion (STD-0)

28/08/2022, 10:50

212. Nuclear magnetic resonance of $^8$Li ions implanted in ZnO (STD-4 / P-MON-31)

Jonah Adelman (University of British Columbia)

28/08/2022, 11:30

Semiconductors

Oral

ZnO is a wide direct bandgap (3.4 eV) semiconductor with promising electronic properties potentially useful in room temperature optoelectronic and spintronic devices. It can be used as a dilute magnetic semiconductor by tuning intrinsic or extrinsic magnetic defects while ZnO also demonstrates many unique surface effects such as a photogenerated metallic state. Imperative to utilizing these...

221. A wolf in sheep's clothing? Muon-induced magnetism in quantum spin ice (STD-5 / P-MON-33)

Hank Wu (Oxford University)

28/08/2022, 11:45

Strongly correlated electron systems

Oral

Compounds of the form $\rm{A}_2\rm{X}_2\rm{O}_7$ with the pyrochlore structures can exhibit classical or quantum spin ice behaviour if the crystal field environment of the $\rm{A}\rm{O}_8$ arrangement leads to the [111] easy-axis anisotropy. When Pr occupies the A-site, there is a low-lying electronic doublet and $\rm{Pr}_2\rm{X}_2\rm{O}_7$ compounds are found to be quantum spin ices$^1$....

173. Negative muon spin relaxation in water and ice (STD-6 / P-MON-22)

Yoko Kimura (Dept. Phys. Osaka Univ.)

28/08/2022, 12:00

Molecular chemistry and chemical physics

Oral

Muons are the main component of cosmic ray particles on the earth, and most of the cosmic ray muons are injected into water or ice, which occupy more than 70% of the earth's surface. When negative muons ($\mu$$^-$) stop in H$_2$O, they are mainly trapped by oxygen nuclei and form muonic oxygen atoms O$\mu$$^-$, and about 15% of O$\mu$$^-$ atoms finally change to stable nitrogen isotopes...

160. Calculating muon sites and couplings from a high-throughput modelling perspective (STD-7 / P-TUE-8)

Dr Muhammad Maikudi ISAH (Department of Mathematical, Physical and Computer Sciences, University of Parma, 43124 Parma, Italy)

28/08/2022, 12:15

Site calculations

Oral

In muon spin spectroscopy, the knowledge of muon implantation sites and hyperfine couplings is of importance to the analysis of the experimental data. Over the past decade there has been significant progress in calculating muon sites using first-principles methods such as density functional theory (DFT) [1,2].  However, the protocols required for muon calculations are both resource and task...

151. Development and test of a TDC and amplifier circuit for a multi-channel positron detector. (STD-8 / P-TUE-5)

Marta-Villa de Toro Sanchez (Centre for Molecular and Materials Science, TRIUMF – School of Physics and Astronomy, The University of Edinburgh)

28/08/2022, 13:45

New techniques

Oral

In a continuous beam muon facility positrons are detected by relatively large plastic scintillators without position sensitivity. An idea has been proposed to make these positron detectors multi-channel and able to track the positron trajectories. This will ultimately enable 2-dimensional magnetic imaging of the sample with the µSR technique. To attain this “muon microscope” idea, large...

302. Inducing Quantum Criticality in CrCl$_3$ Under Pressure (STD-9 / P-TUE-41)

Yuqing Ge (Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden)

28/08/2022, 14:00

Spin liquids and related phenomena

Oral

Accelerated by the discovery of graphene, research on two-dimensional (2D) materials have attracted tremendous attention both from fundamental and applied sciences. Among the large number of 2D materials, chromium trihalides CrX3 (X = Cl, Br, I) van der Waals (vdW) magnets have also raised a large interest due to the existence of many magnetic subtleties that cannot be explained by their...

295. Possible p-wave parity in Cr-based superconductor Pr$_3$Cr$_{10-x}$N$_{11}$ (STD-10 / P-MON-39)

Changsheng Chen (Fudan University)

28/08/2022, 14:15

Superconductivity

Oral

Superconductivity with a critical temperature $T_C$ $\sim$ 5.25 K was recently reported in the Cr-based superconductor Pr$_3$Cr$_{10-x}$N$_{11}$. The large upper critical field $H_{C2}$ $\sim$ 20 T, and the strong correlation between 3$d$ electrons derived from specific heat, suggest the unconventional superconductivity nature of this compound. We performed muon-spin rotation/relaxation...

218. Data analysis for µSR experiments with negative muons. (STD-11 / P-MON-32)

Mr George Gill (University of Oxford / ISIS)

28/08/2022, 14:30

New techniques

Oral

Negative muons are often overlooked compared to their positive counterpart, partly due to the loss of around $\frac{5}{6}$ of the $\mu^{-}$ spin polarisation when a $\mu^{-}$ cascades down to the 1s muonic ground state after being captured by a nucleus. One needs to count for around 36 times as long to get statistics comparable to that of a $\mu^{+}$SR experiment. However, there has been a...

296. Profiling defect and charge carrier density in the SiO$_2$/4H-SiC interface with Low-Energy Muons (STD-12 / P-MON-40)

Maria Mendes Martins (Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute)

28/08/2022, 15:15

Semiconductors

Oral

Silicon carbide (4H-SiC) is a wide-bandgap semiconductor with promising applications in high-power and high-frequency devices. An advantage of SiC is that it is the only compound semiconductor that has the ability to form native silicon dioxide (SiO$_2$). The performance of SiC-based devices relies heavily on interface effects. However, characterization of oxidation-induced defects - both in...

220. Development of magnetic resonance imaging (MRI) system using beta-NMR technique (STD-13 / P-THU-12)

Mr Takato Sugisaki (Dept. Phys. Osaka Univ.)

28/08/2022, 15:30

New techniques

Oral

Today, the technology of magnetic resonance imaging (MRI) has been established and it is essential in the medical field. MRI is the method of making an in-situ image by utilizing nuclear magnetic resonance (NMR). However, the MRI technique has rarely been put to practical use for elements other than hydrogen because of the sensitivity issue. On the other hand, the technique of...

200. Time-reversal symmetry breaking in nonsymmorphic type-I superconductor YbSb$_2$ (STD-14 / P-MON-30)

Ms Anshu Kataria (PhD Scholar)

28/08/2022, 15:45

Superconductivity

Oral

The interplay of superconductivity with nontrivial topological phases exhibit the fascinating topological superconductivity, which has attracted widespan attention from observing quasiparticle like Majorana fermions to its application in fault-tolerant quantum computation$^{1,2}$. It is proposed that the topological superconductivity can be realized in compounds having topological surface...

281. Anomalous electrical transport in frustrated intermetallic RCuAs$_2$ : the role of spin (STD-15 / P-MON-38)

Mae Abedi (Department of Physics, Simon Fraser University)

28/08/2022, 16:00

Strongly correlated electron systems

Oral

The Kondo effect was a longstanding theoretical puzzle, describing the scattering of conduction electrons in a metal due to dilute, localised d- or f -electron magnetic impurities and resulting in a characteristic minimum in electrical resistivity with temperature. Extended to a lattice of magnetic impurities, the Kondo effect likely explains the formation of so called heavy Fermion systems...