|
| Area of Interest |
| Please
see my research brochure.
Solid State
Chemistry and Inorganic Materials
Solid
state and materials chemistry, electronic and magnetic intermetallics,
borides, carbides and metal oxides are the major research areas that my
group is studying.Of particular interest are crystal growth
of materials that exhibit metal-to-insulator transitions, mixed valence,
superconductivity, and magnetic frustration.Efforts are placed
on the synthesis, structures, and properties of new materials in order
to understand their crystal-chemistry.
Our
interests are in structure/property relationships of single crystal intermetallics
that exhibit exotic properties that arise from strong electron-electron
correlations. These materials include Kondo insulators and low-carrier
density magnets, intermetallic superconductors and heavy fermion materials.
Correlated
Electronic Materials
Highly
correlated electron systems are of considerable interest, particularly
in the design, discovery and growth of novel bulk materials.One
of the primary driving forces of basic research in the physics of new materials
is the synthesis of these materials in single crystalline form.The
study of the magnetic and transport behavior of single crystals allows
for a fundamental correlation of the structures and physical properties
of these materials. We also want to study the role of transition metals
in heavy-electron systems along with the relationship of the magnetism
to superconductivity in these materials.
It
is well known that BCS superconductivity is a result of electron-phonon
interaction, whereas the superconductivity of a less-known class of superconductors,
heavy fermions, relies on strong electron-electron interactions. At room
temperature, heavy fermion materials behave as normal metals where the
f-electrons
interact weakly with conduction electrons and display local-moment magnetic
properties, but at low temperatures (T < 20 K), the unique properties
of heavy fermion materials become to manifest. The strong coupling between
conduction electrons and f-electrons results in an enhanced linear-in-T
contribution to the specific heat (with g
typically greater than 200 mJmol-1K-2).
Our
search for highly correlated systems has in part been motivated by the
search for materials for spintronics, a new technology that merges electronics
with the manipulation of conduction electron spins.One of
the most successful strategies for producing technologically relevant magnetoresistive
materials is to enhance the effects of field dependent magnetic scattering
processes through the creation of magnetic superlattices, or by doping
magnetic insulators such that magnetic and metal–insulator transitions
coincide.The study of these materials can perhaps lead to
the exploitation of ‘spin’ of the electron rather than its charge.An
example of a spintronic device is the giant magnetoresistive spin-valve
head for magnetic hard-disk drives.Some of the physics that
we wish to study include the change of resistivity with magnetic field
and temperature.One way to change the properties of a material
is to carefully tune the behavior by altering its chemistry.
 
Single
crystals of Intermetallics
Contact
Information:
Prof. Julia
Y. Chan
Department
of Chemistry
Louisiana
State University
Baton Rouge,
LA 70803-1804
Phone: 225-578-2695
FAX: 225-578-3458
Office: Choppin
637
|
|
| Selected
Awards & Honors: |
| Iota Sigma Pi Agnes Fay Morgan Research Award, 2008
LSU Distinguished Faculty Award, 2008
LSU College of Basic Science Graduate Teaching Award, 2007
American Chemical Society Dreyfus Lectureship Award, 2006
Baylor University Outstanding Alumni Award, 2006
College of Basic Sciences Faculty Research Award, 2005
Invited to attend the Alfred Nobel Symposium at Stockholm, Sweden,
June 2005
Alfred P. Sloan Research Fellow, 2004
ACS Exxon Mobil Faculty Fellowship in Solid State Chemistry, 2004
Elected to the U.S. National Committee for Crystallography (USNC/Cr),
2004
LSU Phi Kappa Phi Non-Tenured Natural and Physical Science Award,
2003
NSF CAREER Award, 2003
American Crystallographic Association Margaret C. Etter Early Career
Award, 2003
Ralph E. Powe Junior Faculty Enhancement Award, 2002
National Research Council Postdoctoral Fellowship at the National
Institute of Standards and Technology, Materials Science and Engineering
Laboratory, 1998-2000 |
| Selected
Publications |
Gautreaux, D.P.; Capan, C.; DiTusa, J.F.; Chan, J.Y., Crystal Growth,
Characterization, and Physical Properties of b-LnNiSb3
(Ln =Pr, Nd, Sm, Gd, Tb) J. Solid State Chem. 2008, 181,
1977-1982
Cho, J.Y.; Millican J. N.; Moldovan, M.; Young, D. P.; Sokolov, D.;
Aronson, M.C.; Chan, J. Y., Synthesis, structure, and physical properties
of Ln2MGa12 (Ln = La, Ce; M = Ni, Cu) Chem.
Mater. 2008, 20 6116-6123.
Nambu, Y.; Nakatsuji, S.; Maeno, Y.; Okudzeto, E.K.; Chan, J.Y., Spin
size dependence in the appearance of 2D coherent behavior in the frozen
spin disordered state of the triangular antiferromagnetic NiGa2S4,
Phys.
Rev. Lett., 2008, 101, 207204
Cho, J.; Moldovan, M.; Young, D. P.; Nathan, A.; Chan, J. Y. Synthesis,
Structure, and Physical Properties of LnAgyX4- y (Ln = La, Ce;
X = Al, Ga; y ~ 0.72). Physica B, 2008, 403, 795.
Okudzeto, E.K; Thomas, E.L.; Moldovan, M.; Young D.P. and Chan J.Y.
Transport and magnetic properties of the stannides Ln7Co6Sn23
(Ln = Dy, Ho), and Ln5Co6Sn18 (Ln = Er,
Tm). Physica B, 2008, 403, 1628.
Kanatzidis et al. Report from the third workshop on future
directions of solid-state chemistry: The status of solid-state chemistry
and its impact in the physical sciences. Progress in Solid
State Chemistry,
2008, 36, 1-133
Karki, A. B.; Gautreaux, D. P.; Chan, J.Y.; Harrison, N.; Browne, D
A.; Goodrich, R.G.; Young, D.P. Magnetotransport properties and
the Fermi surface of single crystal VB2. J. Phys.:
Condens. Matter,
2008, 20, 035209.
Cho, J.Y.; Capan, C.; Young, D.P.; Chan, J.Y. Crystal Growth,
Structure, and Physical Properties of SmCu4Ga8. Inorg. Chem.,
2008,
7, 2472
Karki, A.B. Young, D.P.; Adams, P.W. ; Okudzeto, E.K.; Chan, J.Y.
Critical
Current Behavior of Superconducting MoN and Mo3Sb7 Microfibers. Phys.
Rev. B, 2008, 77, 212503
Gautreaux, D.P.; Capan, C. ; DiTusa, J.F.; Young, D.P.; Chan, J.Y.
Synthesis, Structure and Physical Properties of LnNi(Sn,Sb)3 (Ln = Pr,
Nd, Sm, Gd, Tb). J. Solid State Chem., 2008, In Press.
Guo, S. ; Young, D.P.; Macaluso, R.T. ; Browne, D.A.; Henderson, N.L.;
Chan, J.Y. ; Henry, L.L; DiTusa, J.F. Discovery
of Griffths phase in itinerant magnetic semiconductor Fe1xCoxS2. Phys.
Rev. Lett, 2008, 100, 017209
Gautreaux, D.P.; Parent, M.; Moldovan, M.; Young, D.P.; Chan, J.Y.
Magnetization and Transport Properties of a-CeNi0.78Co0.22Sb3. Physica
B, 2008, 403, 1005
Thomas, E.L; ,Gautreaux, D.P.; Lee, H.-O.; Fisk, Z.; Chan, J.Y. Discovery
of -LnNiSb3 (Ln = La, Ce): Crystal Growth, Structure, and Magnetic and
Transport Behavior. Inorg. Chem., 2007, 46, 3010-3016
Macaluso, R.T.; Nakatsuji, S.; Kuga, K.; Thomas, E.L.; Machida, Y.;
Maeno, Y.; Fisk, Z.; Chan, J.Y. Crystal
Structure and Physical Properties of Polymorphs of LnAlB4 (Ln = Yb, Lu).
Chem.
Mater., 2007, 19, 1918-1922
Thomas, E.L.; Kim, M. S.; Sokolov, D. A.; Bennett, M. C. ; Aronson,
M.C.; Chan, J.Y. Structure,
magnetic, and transport behavior of twinned Ce2Rh3(PbBi)5. J.
Solid State Chem., 2007, 180, 2356-2362
Nakatsuji, S; Tonomura, H. Onuma, K. ; Nambu, Y. ; Sakai, O.; Maeno,
Y. ; Macaluso,R.T. ; Chan, J.Y. Spin
disorder and order in quasi-2D triangular Heisenberg antiferromagnets:
Comparative study of FeGa2S4, Fe2Ga2S5, and NiGa2S4. Phys.
Rev. Lett., 2007, 99, 157203
Cho, J.Y.; Moldovan, M.; Young; D.P.; Chan, J.Y. Crystal
Growth and Magnetic Properties of Ln4MGa12 (Ln = Dy - Er; M = Pd, Pt).
J.
Phys.: Condens. Matter, 2007, 19, 266224
Millican, J.N.; Macaluso, R.T.; Nakatsuji, S.; Machida, Yo; Maeno,
Y; Chan, J.Y. Crystal
Growth and Structure of R2Ir2O7 (R = Pr, Eu) Using KF molten flux.
Mater.
Res. Bull., 2007, 42, 928–934
Williams, W. M.; Moldovan, M; Pham, L.; MaQuilon, S.; Young, D. P.;
Fisk, Z.; Chan, J.Y. Crystal
Growth, Structure, Magnetic and Transport Properties of TbRhIn5. Inorg.
Chem., 2006, 45, 4637 - 4641
Thomas, E.L.; Gautreaux, D.P.; Chan, J.Y. The
layered intermetallic compound LaPdSb3. Acta Cryst. E.,
2006,
62, i96-i98
Thomas, E.L.; Okudzeto, E.; Millican, J.N.; Chan, J.Y. Crystal
Growth and the Search for Heavy Fermion Intermetallics. Comments
Inorg. Chem. (Review Article), 2006, 27, 1-39
Thomas, E. L.; Bankston, A. N.; Lee, H.-O.; Moldovan, M.; Fisk, Z.;
Young, D. P.; Chan, J. Y. Crystal
Growth, Transport and Magnetic Properties of Ln3Co4Sn13 (Ln = La, Ce) with
a Perovskite-like Structure. J. Solid State Chem., 2006,
179, 1641-1648
Nakatsuji, S.; Machida, Y.; Maeno, Y.; Tayama, T.; Sakakibara, T.;
Duijn, J.v.; Balicas, L.; Millican, J.N.; Macaluso, R.T.; Chan, J.Y. Metallic
spin-liquid behavior of the geometrically frustrated Kondo lattice Pr2Ir2O7.
Phys.
Rev. Lett., 2006, 96, 087204
Kim, M.S.; Bennett, M.; Sokolov, D.A.; Aronson, M.; Millican, J.N.;
Chan, J.Y.; Huang, Q.; Chen, Y.; Lynn, J. Synthesis
and study of the ferromagnetic heavy-fermion compound Yb5Pt9. Phys.
Rev. B, 2006, 74, 224431
Williams, W. M.; Lee, H.-O.; Moldovan, M.; Fisk, Z.; Young, D. P.;
Chan, J. Y. Structure-Property Relationships in Tb4PtGa12 and Y4PtGa12.
Mater.
Res. Soc. Symp. Proc, 2005, 848, FF4.5.1
Macaluso, R. T.; Millican, J. N.; Lee, H.-O.; Nakatsuji, S.; Carter,
B.; Moreno, N.; Fisk, Z.; Chan, J. Y. A
comparison of the structure and localized magnetism in Ce2PdGa12 with the
heavy fermion CePdGa6. J. Solid State Chem., 2005,
178, 3547-3553
Thomas, E. L.; Erickson, E. E.; Moldovan, M.; Young, D. P.; Chan, J.
Y. Synthesis, Structure and Magnetism of ErCoIn5. Mater.
Res. Soc. Symp. Proc., 2005, 848, FF3.7.1
Thomas, E.L.; Moldovan, M.; Young, D.P.; Chan, J.Y. Synthesis,
structure, and magnetotransport of LnNi1-xSb2 (Ln = Y, Gd-Er). Chem.
Mater., 2005, 17, 5810 - 5816
Young, D.P.; Moldovan, M.; Wu, X.S.; Adams, P.W. ; Chan, J.Y. Low
temperature susceptibility of the noncentrosymmetric superconductor CePt3Si.
Phys.
Rev. Lett., 2005, 94, 107001
Williams, W. M.; Moldovan, M.; Young, D. P.; Chan, J. Y. Synthesis,
structure, and magnetism of Tb4PdGa12 and Tb4PtGa12. J. Solid
State Chem., 2005, 178, 52-57
Millican, J. M.; Macaluso, R.T.; Young; D.P.; Moldovan, M.; Chan, J.Y.
Synthesis,
structure and magnetism of Ce2PdGa10. J. Solid State Chem.,
2004,
177, 4695-4700
Macaluso, R. T.; Wells, D. M.; Sykora, R. E.; Albrecht-Schmitt, T.
E.; Mar, A.; Nakatsuji, S.; Lee, H.; Fisk, Z.; Chan, J. Y. Structure
and electrical resistivity of CeNiSb3. J. Solid State Chem.,
2004,
177, 293
Thomas, E.L.; Macaluso, R.T.; Lee, H.-O.; Fisk, Z. and Chan, J.Y.
Crystal
Growth, Characterization, and Physical Properties of PrNiSb3, NdNiSb3 AND
SmNiSb3. J. Solid State Chem., 2004, 177, 4228–4236
Wilson, Z. S.; Macaluso, R. T.; Smith, J. L.; Fisk, Z.; Stanley, G.
G.; Chan, J. Y. Rare
beryllium icosahedra in the mixed-valence compound CeBe13. J.
Am. Chem. Soc., 2004, 126, 13926-13927
Harrison, N.; Alver, U.; Goodrich, R. G.; Vekhter, I.; Sarrao, J. L.;
Pagliuso, P. G.; Moreno, N.; Balicas, L.; Fisk, Z.; Hall, D.; Macaluso,
R. T.; Chan, J. Y. 4f-electron
localization in CexLa1-xMIn5 (M = Co, Rh, Ir). Phys. Rev.
Lett., 2004, 93, 186405.
Macaluso, R.T.; Moreno, N. O.; Fisk, Z.; Thompson, J. D. ; Chan, J.Y.
Structure
and magnetism of Ce5Pb3O. Chem. Mater, 2004, 16,
1560-1563.
Williams, W. M.; Macaluso, R. T.; Moldovan, M. Y., D.P; Chan, J. Y.
Synthesis,
structure, and magnetoresistance of SmPd2Ga2. Inorg. Chem.,
2003,
42, 7315 - 7318
Acatrinei, A. I.; Browne, D.; Losovyj, Y.; Young, D. P.; Moldovan,
M.; Chan, J. Y.; Sprunger, P. T.; Kurtz, R. L. Angle-resolved photoemission
study and first principles calculation of the electronic structure of LaSb2.
J.
Phys.: Condens. Matter, 2003, 15, L511
Young, D. P.; Moldovan, M.; Craig, D. D.; Adams, P.; Chan, J. Y. Superconducting
properties of MgCNi3 films. Phys. Rev. B Rapid Communications,
2003,
68, 020501 (R)
Young, D. P.; Goodrich, R. G; DiTusa, J. F.; Guo, S.; Adams, P. W.,Chan,
J. Y.Hall, D. High magnetic field sensor using LaSb2. Appl.
Phys. Lett., 2003, 82, 3713
Macaluso, R. T.; Sarrao, J. L.; Moreno, N. O.; Pagliuso, P. G.,Thompson,
J. D.; Hundley, M. F., Malinowski, A.; Fronczek, F. R., Chan,J. Y. Single-Crystal
growth of Ln2MIn8 (Ln = La, Ce; M = Rh, Ir): Implications for the heavy-fermion
ground state. Chem. Mater, 2003, 15, 1394 - 1398
Macaluso, R. T.; Nakatsuji, S.; Lee, H.; Young, D. P.; Fisk, Z.; Chan,
J. Y. Synthesis, structure, and magnetism of a new heavy-fermion,
CePdGa6. J. Solid State Chem., 2003, 174, 296
Erickson, E. E.; Gray, D.; Taylor, K.; Macaluso, R. T.; LeTard, L.
A.; Lee, G. S.; Chan, J. Y. Synthesis, structure and dielectric
characterization of Ln2Ti2-2xM2xO7 (Ln = Gd, Er; M = Zr, Sn, Si). Mater.
Res. Bull, 2002, 37, 2077
D.P. Young, R.G. Goodrich, P.W. Adams, J.Y. Chan, F.R. Fronczek, F.
Drymiotis and L.L. Henry. Superconducting
Properties of BeB2. Phys. Rev. B, 2002, 65, 180518(R)
Q. Huang, D.P. Young, J.Y. Chan, J. Jiang and E.J. Podlaha. Electrodeposition
of FeCoNiCu/Cu Compositionally Modulated Multilayers. J. Electrochem.
Soc., 2002, 149, C349
H. Kim, J.Y. Chan, M.M. Olmstead, P. Klavins, D.J. Webb and S.M. Kauzlarich.
Magnetism
and Colossal Magnetoresistance (CMR) of the pseudo-ternary rare-earth Transition
Metal Compounds; Eu14-xCaxMnSb11 (x<3). Chem. Mater.,
2002,
14, 206
A.C. Payne, A. Sprauve, M.M. Olmstead, S.M. Kauzlarich, J.Y. Chan,
B.A. Reisner and J.W. Lynn. Synthesis, Magnetic and Electronic Properties
of Single Crystals of EuMn2P2. J. Solid State Chem., 2002,
163, 498
Macaluso, R.T. , Sarrao, J.L.; Pagliuso, P.G., Moreno, N.O., Goodrich,
R.G. Browne, D.A., Fronczek, F.R. and Chan, J.Y. Crystal Growth
and Structure Determination of LaMIn5 (M=Co, Rh, Ir). J. Solid
State Chem., 2002, 166, 245
I. Levin, J.Y. Chan, J.H. Scott, L. Farber, T.A. Vanderah and J.E.Maslar.
Complex Polymorphic Behavior and Dielectric Properties of Perovskite-Related
Sr(Sr1/3Nb2/3)O3. J. Solid State Chem., 2002, 166,
24
J.Y. Chan, F.R. Fronczek, D.P. Young, J.F. DiTusa and P.W. Adams.
Synthesis, Structure and Superconductivity in Be1.09B3. J. Solid
State Chem., 2002, 163, 385
DiTusa, J.F.; Chan, J.Y. The Road to New Materials. Physics
World, 2002, 15, 25-26
I. Levin, J.Y. Chan, J.E. Maslar and T.A. Vanderah. Phase Transitions
and Microwave Dielectric Properties in the Perovskite-like Ca(Al0.5Nb0.5)O3
- CaTiO3 System. J. Appl. Phys., 2001, 90, 904-914
I. Levin, J.Y. Chan, R.G. Geyer, J.E. Maslar and T.A. Vanderah.
Cation Ordering Types and Dielectric Properties in the Complex Perovskite
Ca(Ca1/3Nb2/3)O3. J. Solid State Chem., 2001, 156,
122-134
H. Kim, M. Olmstead, J.Y. Chan, P.C. Canfield, I.R. Fisher, R.W. Henning,
A.J. Schultz and S.M. Kauzlarich. Structure and Physical Properties
of the New Pseudo-binary Intermetallic Compound Ti11(Sb,Sn)8. J.
Solid State Chem., 2001, 157, 225-232
J.Y. Chan, T.A. Vanderah, I. Levin, R.G. Geyer and R.S. Roth.
Subsolidus Phase Relationships and Dielectric Properties in the SrO-Al2O3-Nb2O5
System. Intl. J. Inorg. Mater., 2000, 2, 107-114
T.A. Vanderah, W. Febo, J.Y. Chan, R.S. Roth, J.M. Loezos, L.D. Rotter,
R.G. Geyer and D.B. Minor. Phase Equilibria and Dielectric Behavior
in the CaO: Al2O3: Nb2O5 System. J. Solid State Chem., 2000,
155, 78-85
J.Y. Chan, M.M. Olmstead, H. Hope and S.M. Kauzlarich. Synthesis,
Structure and Properties of Eu16Sb11 and Eu16Bi11. J. Solid State
Chem., 2000, 155, 168-176
J.Y. Chan, S.M. Kauzlarich, P. Klavins, J.Z. Liu, R.N. Shelton and
D.J. Webb. Synthesis, Magnetic Properties, and Colossal Magnetoresistance
of Eu13.97Gd0.03MnSb11. Phys. Rev. B, 2000, 61, 459
|
| Former
Ph.D. Students |
Evan Thomas Ph.D.,12/06,
NRC Postdoc at NIST MSEL Ceramics Division
Robin Macaluso Ph.D,12/04,
Assistant Professor Northern Colorado University
Jasmine Millican Ph.D.,05/07,
NRC Postdoc - NIST Center for Neutron Research |
|
|
