Last updated August 2006

1. Most Significant Research Contributions in last 6 years-

1. Papers 6 and 8 describe the first use of b- detected nuclear magnetic resonance as a nanoscale probe in condensed matter. Subject of 16 invited symposium talks. These works open up a new way to probe the magnetic properties of quantum materials, their interfaces and finite size effects.

2. Papers 3 and 15 provide evidence for a connection between magnetism and

superconductivity in the cuprate superconductors. Subject of invited talk at March meeting of the APS 2003. This was Roger Miller’s Ph.D thesis.

3. Paper 20 is the first observation of the Kramer Pesch effect in the quantum limit. The observed reduction in the core radius due to de-occupation of bound states is smaller than predicted from theory. This was R. Miller’s M.Sc. thesis.

4. Paper 9 describes first test of a truly isolated impurity ( the muon) in a quantum spin ½ Heisenberg chain. This was part of the Ph.D. thesis of J. Chakhalian.

5. Paper 25 Using a combination of muon spin rotation, neutron scattering and magnetic susceptibility we identify for the first time a new kind of magnetic state called a cooperative paramagnet which remains dynamic down to temperatures well below the exchange energy. This is part of S. Dunsiger’s Ph.D. thesis,

2. Recent Papers in Refereed Journals

1. Z. Salman, R.F. Kiefl, K.H. Chow, M.D. Hossain, T.A. Keeler, S.R. Kreitzman, C.D.P. Levy, R.I. Miller, T.J. parolin, M.R. Pearson, H. Saadaoui, M. Smadella, D. Wang, W.A. MacFarlane, Near Surface Structural Phase Transition in SrTiO3 Studied with Zero-Field beta-Detected Nuclear Spin Relaxation, Phys.Rev. Letts. 96, 147601 (2006).

2. S. R Dunsiger, R.F. Kiefl, J.A. Chakhalian, J.E. Greedan, W.A. MacFarlane, R.I. Miller, G.D. Morris, A.N. Price, N.P. Raju, J.E. Sonier, Magnetic Field Dependence of Muon Spin Relaxation in Geometrically Frustrated Gd2Ti2O7, Phys. Rev B, 73 172418 (2006).

3. R.I. Miller, R.F. Kiefl, J.H. Brewer, J.E. Sonier, R. Liang D.A. Bonn, W. Hardy, Coexistence of Antiferrromagnetism and Superconductivity in YBa₂Cu₃O_{6.35 ,} Phys. Rev. B,73, 144509 (2006).

4. B.E. Schultz, K.H. Chow, B. Hitti, R.F. Kiefl, R.L. Lichti, S.F.J. Cox, Local Structure of Isolated Positively Charged Muonium in p-type GaAs, Phys. Rev Letts 95 086404 (2005).

5. B.E. Schultz, K.H. Chow, B. Hitti, Z. Salman, S.R. Kreitzman, R.F. Kiefl, and R.L. Lichti,

Nature of Charged Muonium in GaAs with an Electric Field, Phys. Rev. B , 72 332001 (2005).

6. G.D. Morris, W.A. MacFarlane, K.H. Chow, R.F. Kiefl, S.R. Kreitzman, C.D.P. Levy, Z. Salman, et al, Depth Controlled Beta-Detected NMR of Low Energy ⁸Li In a Silver Film, Phys. Rev. Letts. 73, 157601 (2004).

7. J.E. Sonier, F.D. Callaghan, R.I. Miller, E. Boaknin, R. Kiefl, J.H. Brewer, Shrinking magnetic vortices in V₃Si due to delocalized quasiparticle core states: Confirmation of the microscopic theory     of type-II superconductivity , Phys. Rev. Letts., 93, 17002-1 (2004).

8. Z. Salman, E. Reynard, R.F. Kiefl, W.A. MacFarlane, K.H. Chow, S.R. Kreitzman, S. Daviel, C.D.P. Levy, R. Poutissou, b- Nuclear Quadrupole Resonance with Low Energy ⁸Li, Phys. Rev. B. 70, 104404 (2004).

9. J.A. Chakhalyian, R.F. Kiefl, et al. , Local Magnetic susceptibility of the Positive Muon in the Quasi 1D S=1/2 Antiferromagnet CPC, Phys. Rev. Letts. 91, 027202 (2003).

10. J. A. Chakhalian, R. F. Kiefl, S. R. Dunsiger, W. A. MacFarlane, R. Miller, J. E. Sonier,

and J. E. Fischer, Evidence for local moment formation around the positive muon in graphite,

Phys. Rev. B 66, 155107 (2002).

11. Ohishi, K. Kakuta, K., Akimitsu, J., Higemoto, W., Kadono, R., Sonier, J.E., Price, A.N., Miller, R.I., Kiefl, R.F., Nohara, M., Suzuki, H. and Takagi, H., Nonlocal Effects and Shrinkage of the Vortex Core Radius in YNi₂B₂C, Probed by mSR, Phys. Rev. B 65, 140505 (2002).

12. Price, A.N., Miller, R.I., Kiefl, R.F., Chakhalian, J.A., Dunsiger, S.D., Morris, G.D., Sonier, J.E., Canfield, P.C., Anomalous Vortex State of Superconducting LuNi₂B₂C, Phys. Rev. B. 65 214520 (2002).

13. Sonier, J.E., Brewer, J.H., Kiefl, R.F., Heffner, R.H., Poon, K., Stubbs, S.L., Morris, G.D., Miller, R.I., Hardy, W.N., Liang, R., Bonn, D., Gardner, J.S., Curro, N.J.,, Correlations Between Charge Ordering and Local Magnetic Fields in YBa₂Cu₃O_6+x, Phys. Rev. B. 66, 134501-1 (2002).

14. Lumsden, M.D., Dunsiger, S.R., Sonier, J.E., Miller, R.I., Kiefl, R.F., Jin, R., He, J., Mandrus, D., Bramwell, S.T., Gardner, J.S., Temperature Dependence of the Magnetic Penetration Depth in the Vortex State of the Pyrochlore Superconductor Cd₂Re₂O₇, Phys. Rev. Letts. 89, 147002-1 (2002).

15. Miller, R.I., Kiefl, R.F., Brewer, J.H., Sonier, Chakhalyian, J., Dunsiger, S.R., Morris, G.D., Price, A.N., Bonn, D.A., Hardy, W.N., Liang, R., Evidence for Antiferromagnetism in the Vortex Cores of Ortho-II YBa₂Cu₃O_{6.50 ,} Phys. Rev. Letts. 88, 137002-1(2002).

16. Chow, K.H., Hitti, B., Kiefl, R.F., Lichti, R.L., Estle, T.L., Direct Observation of the Mu+-Zn- Reaction in GaAs, Phys. Rev. Letts.87, 216403-1 (2001).

17. Sonier, J.E., Brewer, J.H., Kiefl, R.F., Miller, R.I., Morris, G.D., Stronach, C.E., Gardner, J.S., Dunsiger, S.R., Bonn, D.A., Hardy, W.N., Liang, R., Anomalous Weak Magnetism in Superconducting YBa₂Cu₃O_6+x, Science 292, 1692-1695, 2001.

18. Sonier, J.E., Brewer, J.H., Kiefl, R.F., Bonn, D., Chakhalian, J., Dunsiger, S.D., Hardy, W.N., Liang, R., MacFarlane, W.A., Miller, R.I., Noakes, D.R., Riseman, T.M., Stronach, C.E. Phys. Rev. B 61, R890 (2000).

19. Dunsiger, S.R., Gardner, J.S., Chakhalian, J.A., Cornelius, A.L. , Jaime, M. Kiefl, R.F., Movshovich, R., MacFarlane, W.A., Miller, R.I., Sonier, J.E., and Gaulin, B.D., Low Temperature Spin Dynamics of the Geometrically Frustrated Antiferromagnetic Garnet Gd₃Ga₅O₁₂. Phys. Rev. Letts. 85, 3504 (2000).

20. Miller, R.I., Kiefl, R.F., Brewer, J.H., Chakhalyian, J., Dunsiger, S., Morris, G.D., Sonier, J.E., MacFarlane, W.A., Low Temperature Limit of the Vortex Core Radius and the Kramer Pesch Effect in NbSe₂, Phys. Rev. Letts. 85, 1540 (2000).

21. Chow, K.H., Kiefl, R.F. , Hitti, B. , Estle, T.L., Lichti, R.L., Novel Behaviour of Bond Centered Muonium in heavily Doped n-type Silicon: Curie-like Susceptibility and Charge Screening. Phys. Rev. Letts. 84, 2251-2254 (2000).

22. Sonier, J.E., Brewer, J.H., Kiefl, R.F., Muon Spin Rotation Studies of the Vortex State in Type II Superconductors, Rev. Mod. Phys. 72, 769-811 (2000).

23. Sonier, J., Kiefl, R.F., Brewer, J.H., Bonn, D., Dunsiger, S. Liang, R.X., Miller, R.I., Noakes, D.R. Stronach, C.E., Expansion of the Vortex cores in YBa₂Cu₃O_6.95 at Low Magnetic Fields, Phys. Rev. B, 59, R729-R732 (1999).

24. Sonier, J.E. Brewer, J.H., Kiefl, R.F., Morris, G.M., Miller, R.I., Bonn, D.A., Chakhalyian, J., Heffner, R.H., Hardy, W.N., Liang, R., Field Induced Reduction of the Superfluid Density in YBa₂Cu₃O_6.95. Phys. Rev. Letts. 83, 4156 (1999).

25. Gardner, J.S. Dunsiger, S.R., Gaulin, B.,Gingras, M.J.P., Greedan, J.E., Kiefl, R.F., Lumsden, M.D., MacFarlane, W.A., Raju, N.P., Sonier, J.E., Swainson, I., Tun, Z. Cooperative Paramagnetism in the Geometrically Frustrated Pyrochlore Antiferromagnet Tb₂Ti₂O₇, Phys. Rev. Letts. 82, 1012-1015 (1999).

3. Recent Papers in Refereed Conference Proceedings

26. R.I. Miller, R.F. Kiefl, J.H. Brewer, Z. Salman, J.E. Sonir, F. Callaghan, D.A. Bonn, W.N. Hardy, R. Liang, Coexistance of Antiferrromagnetism and Superconductivity in Single Crystal Underdoped YBa2Cu3O6+x, Physica B 374-375, 215 (2006).

27. K.H. Chow, Z. Salman, W.A. MacFarlane, B. Campbell, T.A. Keeler, R.F. Kiefl, C.D.P. Levy, G.D. Morris, T.J. Parolin, R. Poutissou, Z. Yamani, Early ⁸Li⁺ beta-NMR investigations in GaAs and Ge", Physica B 374-375, 215 (2006).

28. R.I. Miller, Z. Salman, R.F. Kiefl, D. Arseneau, K.H. Chow, S. Daviel, M.D. Hossein, T. Keeler, S. Kreitzman, C.D.P. Levy, G.D. Morris, W.A. MacFarlane, T.J. Parolin, R. Poutissou, H. Saadaoui, D. Wang, J.Wei, P. Morales, ⁸Li⁺ beta -NMR in Thin Films of La0:67Ca0:33MnO3", Physica B 374-375 , 30 (2006).

29. T.A. Keeler, Z. Salman, K.H. Chow, B. Heinrich, M.D. Hossain, B. Kardasz, R.F. Kiefl, S.R.Kreitzman, W.A. MacFarlane, O. Mosendz, T.J. Parolin, D. Wang, Hyperfine Fields in a Ag/Fe Magnetic Multilayer Probed with Low Energy Spin Polarized ⁸Li⁺ ", Physica B 374-375, 79 (2006).

30. T.J. Parolin, Z. Salman, J. Chakhalian, D. Wang, T.A. Keeler, Md. Hossain, R.F. Kiefl, K.H. Chow, G.D. Morris, R.I. Miller, W.A. MacFarlane, ⁸Li⁺ beta-NMR of Palladium Foil", Physica B 374-375, 419 (2006)..

31. D. Wang, M.D. Hossain, Z. Salman, D. Arseneau, K.H. Chow, S.Daviel, T.A. Keeler, R.F. Kiefl, S.R. Kreitzman, C.D.P. Levy, G.D.Morris, R.I. Miller, W.A. MacFarlane, T.J. Parolin and H. Saadaoui, beta-Detected NMR of ⁸Li⁺ in the Normal State of 2H-NbSe2", Physica B 374-375, 239 (2006).

32. Z. Salman, R.F. Kiefl, K.H. Chow, W.A. MacFarlane, S.R. Kreitzman,D.J. Arseneau, S. Daviel, C.D.P. Levy, Y. Maeno and R. Poutissou, beta-Detected NQR in Zero Field with a Low Energy Beam of ⁸Li⁺ Physica B 374-375, 468 (2006).

33. B.E. Schultz, I. Fan, B. Hitti, R.F. Kiefl, K.H. Chow, ZeroX: A technique for Studying Weak Dipolar Relaxations at CW Muon Facilities, ⁺ Physica B 374-375, 464 (2006).

34. C.D.P. Levy, R. Baartman, J.A. Behr, A. Hatakeyama, A. Hirayama, H. Izumi, R.F. Kiefl, D. Melconian, G.D. Morris, R. Nussbaumer, M. Olivo, M. Pearson, R. Poutissou, and G.W. Wight, Polarized radioactive beam at ISAC , Proc. 14th Int. Conf. on Electromagnetic Isotope Separators and Techniques Related to Their Applications (EMIS-14), Victoria, May 6 –10, 2002, Nucl. Instrum. B 204, 689 (2003).

35. C.D.P. Levy, R. Baartman, J.A. Behr, R.F. Kiefl, M. Pearson, R. Poutissou, A. Hatakeyama, Y. Hirayama, The collinear laser beam line at ISAC , Proc. Sixth Int. Conf. on Radioactive Nuclear Beams, Argonne, September 22 - 26, 2003, Nucl. Phys. A746, 206 (2004).

36. C.D.P. Levy, R. Baartman, K. Jayamanna, R. Kiefl, T. Kuo, M. Olivo, G.W. Wight, D.Yuan and A.N. Zelenski , A polarized beams project at ISAC, Proc. Fifth Int. Conf. on Radioactive Nuclear Beams, Divonne, France, April 3-8, 2000, Nucl. Phys. A701, 253c (2002).

37. K.L. Hoffman, et al. Fequency Shifts and Local Spin Susceptibility of Muonium in Heavily Doped Si and GaAs, Physica B 326, 175-177 (2003)

38. R. F. Kiefl et al, Low Energy Spin Polarized Radioactive Beams as a Nanoscale Probe of Matter. Physica B 326, 189-195 (2003).

39. T.R. Beals, R.F. Kiefl et al, Range Straggling of Low Energy ⁸Li in Thin Films using b-NMR, Physica B 326, 205-208 (2003).

40. W. A. MacFarlane, et al, Quadrupolar Split ⁸Li b-NMR in SrTiO₃, Physica B 326, 209-212 (2003).

41. W. A. MacFarlane et al, ⁸Li b-NMR in Thin Metal Films, Physica B 326, 213-216 (2003).

42. K.H. Chow, R.F. Kiefl et al, MULTI-New Detector, New Logic New Science, Physica B 326, 279-282 (2003).

43. R. Miller , R.F. Kiefl et al, Penetration Depth and Core Radius mSR Measurements in the Vortex State Near the Lower Critical Field, Physica B 326, 296-299 (2003).

44. J.E. Sonier, J.H. Brewer, R.F. Kiefl et al, Zero-Field mSR Study of YBa₂Cu₃O_6+x ; Evidence for Charge Ordering, Physica B 326, 312-315 (2003).

45. K. Ohishi et al , Anomalous Quasiparticle Excitations in Y(Ni _1-x Pt _x)B₂C, Physica B 326, 364-368 (2003).

46. J. Chakhalian, R.F. Kiefl et al, Local Magnetic Susceptibility of the Positive Muon in the Quasi-1D S=1/2 Antiferromagnet KCuF₃, Physica B 326, 422-426 (2003).

47. S.R. Dunsiger, R.F. Kiefl et al, A Comparison of the Local Magnetic Susceptibility in Rare Earth Pyrochlores , Physica B 326, 475-479 (2003).

48. R.F. Kiefl, et.al. Complementarity of Low Energy Spin Polarized Radioactive Nuclei and Muons, Physica B, 289-290, 640-647 (2000).

49. W.A. MaFarlane, R.F. Kiefl et.al. A mSR Study of Single Walled Carbon Nanotubes, Physica B, 289-290, 589-593 (2000).

50. K. Ohishi et.al. Anomalous Field Dependence of the Vortex Core Radius and Magnetic Penetration Depth in YNi₂B₂C Probed by mSR, Physica B, 289-290, 377-380 (2000).

4. Recent Invited Symposium Lectures (in last 6 years)

1. Application of Muon Spin Rotation in Condensed Matter, Plenary Lecture, American Physical Society Meeting, Vancouver, May 22 1999.

2. Condensed Matter Facility at ISAC, CAP Meeting, June 1999.

3. Complementarity of Spin Polarized Radioactive Nuclei and Muons, mSR99 Conference, Les Diablerets, Switzerland, August 1999.

4. mSR in Superconductors: Fullerenes, NbSe₂, and YBa₂Cu₃O_x. Annual meeting of the Electrochemical Society, Seattle, May 4, 1999.

5. b-NMR at ISAC, TRIUMF ISAC Scientific Symposium, December 1999.

6. Polarized Radioactive Nuclei Applied to Condensed Matter, Western Regional Nuclear Physics Conference, Feb. 2000.

7. Future Prospects in Condensed Matter Physics with Radioactive Ion Beams, Fifth International Conference of Radioactive Nuclear Beams, Divonne, April 2000.

8. Condensed Matter Physics Beyond the Standard Model, Astbury Symposium, April 15 (2000).

9. Applications of Polarized Radioactive Nuclei in Condensed Matter Physics, 2001 Particle Accelerator Conference, June (2001).

10. b- detected NMR, Workshop on Nuclear Orientation, TRIUMF, Aug. 2001

11. b-detected NMR at ISAC: A New Probe of Ultra Thin Structures, 14^th International Conference on Electromagnetic Isotope Separators and Their Applications, Victoria, May 2002.

12. Low Energy Spin Polarized Radioactive Beams as a Nano-scale Probe of Matter, 9^th International Conference on Muon Spin Rotation, Virginia June 2002.

13. Antiferromagnetism and Superconductivity in Ortho-II YBa₂Cu₃O_6+x Studied with Muon Spin Rotation/Relaxation , March Meeting of the APS , 2003.

14. Low Energy Spin Polarized Radioactive Beams in Condensed Matter, CAP, June 2003.

15. Z. Salman and R.F. Kiefl, Low Energy Spin Polarized ⁸Li  and Its Applications In Condensed Matter Physics , VI International Workshop on Applications of Lasers in Atomic and Nuclear Research, Poznan, Poland, May 24 -27, 2004

16. b-Detected NMR and NQR Using Low Energy Polarized Radioactive Nuclei: A Novel probe of Thin Films and interfaces. International Conference on Hyperfine Interactions, Bonn, August 2004 .

17. Low Energy Polarized Radioactive Nuclei: Applications in Condensed Matter The Fourth International Conference on Exotic Nuclei and Atomic Masses (ENAM'04) Sept 2004.

18. Low Energy Polarized Radioactive Nuclei: A Local Probe of Electronic and Magnetic Properties of Thin films and Nanostructures. PACIFICHEM 2005 Dec. 2005.

5. Recent Invited Lectures (in last 6 years)

1. Muon Spin Relaxation as a Probe of Frustrated Magnets, ITP University of California, Santa Barbara, November, 1999.

2. Spin Polarized Probes of Condensed Matter, UVIC, March 2000.

3. Low Energy Spin Polarized Radioactive Nuclei. A Near Surface Probe of Condensed Matter, National Superconducting Cyclotron Lab, MSU, Jan 2002.

4. Beta-Detected NMR at ISAC, NRC Review of TRIUMF, Sept. 2003.

5. Report on beta-NMR at ISAC ACOT meeting TRIUMF, May 2004