Polytypism, polymorphism, and superconductivity in TaSe 2 −x Te x

Luo, Huixia; Xie, Weiwei; Tao, Jing; Inoue, Hiroyuki; Gyenis, András; Krizan, Jason W.; Yazdani, Ali; Zhu, Yimei; Cava, Robert Joseph

doi:10.1073/pnas.1502460112

Title: Polytypism, polymorphism, and superconductivity in TaSe ₂ _−x Te _x

Abstract

Polymorphism in materials often leads to significantly different physical properties - the rutile and anatase polymorphs of TiO₂ are a prime example. Polytypism is a special type of polymorphism, occurring in layered materials when the geometry of a repeating structural layer is maintained but the layer stacking sequence of the overall crystal structure can be varied; SiC is an example of a material with many polytypes. Although polymorphs can have radically different physical properties, it is much rarer for polytypism to impact physical properties in a dramatic fashion. Here we study the effects of polytypism and polymorphism on the superconductivity of TaSe₂, one of the archetypal members of the large family of layered dichalcogenides. We show that it is possible to access 2 stable polytypes and 2 stable polymorphs in the TaSe_2-xTe_x solid solution, and find that the 3R polytype shows a superconducting transition temperature that is between 6 and 17 times higher than that of the much more commonly found 2H polytype. Thus, the reason for this dramatic change is not apparent, but we propose that it arises either from a remarkable dependence of T_c on subtle differences in the characteristics of the single layers present, or from amore »« less

Authors:

Luo, Huixia ^[1]; Xie, Weiwei ^[1]; Tao, Jing ^[2]; Inoue, Hiroyuki ^[3]; Gyenis, András ^[3]; Krizan, Jason W. ^[1]; Yazdani, Ali ^[3]; Zhu, Yimei ^[2]; Cava, Robert Joseph ^[1]

Department of Chemistry and
Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY 11973
Joseph Henry Laboratories and Department of Physics, Princeton University, Princeton, NJ 08544, and

Publication Date:: Tue Mar 03 00:00:00 EST 2015

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1235154

Alternate Identifier(s):: OSTI ID: 1193219

Report Number(s):: BNL-108044-2015-JA
Journal ID: ISSN 0027-8424

Grant/Contract Number:: DE FG02-08ER46544; AC02-98CH10886; SC00112704

Resource Type:: Published Article

Journal Name:: Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:: Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 112 Journal Issue: 11; Journal ID: ISSN 0027-8424

Publisher:: Proceedings of the National Academy of Sciences

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; layered dichalcogenides; superconductivity; charge density wave; polymorphism; polytypism

Citation Formats


                    Luo, Huixia, Xie, Weiwei, Tao, Jing, Inoue, Hiroyuki, Gyenis, András, Krizan, Jason W., Yazdani, Ali, Zhu, Yimei, and Cava, Robert Joseph. Polytypism, polymorphism, and superconductivity in TaSe 2 −x Te x.  United States: N. p., 2015. 
Web.  doi:10.1073/pnas.1502460112.

Copy to clipboard


                    Luo, Huixia, Xie, Weiwei, Tao, Jing, Inoue, Hiroyuki, Gyenis, András, Krizan, Jason W., Yazdani, Ali, Zhu, Yimei, & Cava, Robert Joseph. Polytypism, polymorphism, and superconductivity in TaSe 2 −x Te x.  United States.  https://doi.org/10.1073/pnas.1502460112

Copy to clipboard


                    Luo, Huixia, Xie, Weiwei, Tao, Jing, Inoue, Hiroyuki, Gyenis, András, Krizan, Jason W., Yazdani, Ali, Zhu, Yimei, and Cava, Robert Joseph. Tue .  
"Polytypism, polymorphism, and superconductivity in TaSe 2 −x Te x".  United States.  https://doi.org/10.1073/pnas.1502460112.

Copy to clipboard


                    
@article{osti_1235154,

  title        = {Polytypism, polymorphism, and superconductivity in TaSe 2 −x Te x},

  author       = {Luo, Huixia and Xie, Weiwei and Tao, Jing and Inoue, Hiroyuki and Gyenis, András and Krizan, Jason W. and Yazdani, Ali and Zhu, Yimei and Cava, Robert Joseph},

  abstractNote = {Polymorphism in materials often leads to significantly different physical properties - the rutile and anatase polymorphs of TiO₂ are a prime example. Polytypism is a special type of polymorphism, occurring in layered materials when the geometry of a repeating structural layer is maintained but the layer stacking sequence of the overall crystal structure can be varied; SiC is an example of a material with many polytypes. Although polymorphs can have radically different physical properties, it is much rarer for polytypism to impact physical properties in a dramatic fashion. Here we study the effects of polytypism and polymorphism on the superconductivity of TaSe₂, one of the archetypal members of the large family of layered dichalcogenides. We show that it is possible to access 2 stable polytypes and 2 stable polymorphs in the TaSe2-xTex solid solution, and find that the 3R polytype shows a superconducting transition temperature that is between 6 and 17 times higher than that of the much more commonly found 2H polytype. Thus, the reason for this dramatic change is not apparent, but we propose that it arises either from a remarkable dependence of Tc on subtle differences in the characteristics of the single layers present, or from a surprising effect of the layer stacking sequence on electronic properties that instead are expected to be dominated by the properties of a single layer in materials of this kind.},

  doi          = {10.1073/pnas.1502460112},

  journal      = {Proceedings of the National Academy of Sciences of the United States of America},

  number       = 11,

  volume       = 112,

  place        = {United States},

  year         = {Tue Mar 03 00:00:00 EST 2015},

  month        = {Tue Mar 03 00:00:00 EST 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Publisher's Version of Record
https://doi.org/10.1073/pnas.1502460112

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 88 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Raman study of charge-density-wave excitations in $4 H b - T a S_{2}$
journal, March 1984

Nakashizu, Tsuneo; Sekine, Tomoyuki; Uchinokura, Kunimitsu
Physical Review B, Vol. 29, Issue 6
DOI: 10.1103/PhysRevB.29.3090

Neutron scattering study of the charge-density wave transitions in $2 H - Ta {Se}_{2}$ and $2 H - Nb {Se}_{2}$
journal, July 1977

Moncton, D. E.; Axe, J. D.; DiSalvo, F. J.
Physical Review B, Vol. 16, Issue 2
DOI: 10.1103/PhysRevB.16.801

Questions concerning the form taken by the charge-density wave and the accompanying periodic-structural distortions in $2 H - T a {Se}_{2}$ , and closely related materials
journal, May 1978

Wilson, John A.
Physical Review B, Vol. 17, Issue 10
DOI: 10.1103/PhysRevB.17.3880

Octahedral vs. trigonal-prismatic coordination and clustering in transition-metal dichalcogenides
journal, June 1984

Kertesz, Miklos; Hoffmann, Roald
Journal of the American Chemical Society, Vol. 106, Issue 12
DOI: 10.1021/ja00324a012

A short history of SHELX
journal, December 2007

Sheldrick, George M.
Acta Crystallographica Section A Foundations of Crystallography, Vol. 64, Issue 1, p. 112-122
DOI: 10.1107/S0108767307043930

Visualizing the charge density wave transition in $2 H$ - ${NbSe}_{2}$ in real space
journal, June 2014

Arguello, C. J.; Chockalingam, S. P.; Rosenthal, E. P.
Physical Review B, Vol. 89, Issue 23
DOI: 10.1103/PhysRevB.89.235115

On the Structural Properties of the Ta(1+x)Se2 Phase.
journal, January 1967

Bjerkelund, Einar; Kjekshus, Arne; Nilsson, Åke
Acta Chemica Scandinavica, Vol. 21
DOI: 10.3891/acta.chem.scand.21-0513

Superconductivity induced by Se-doping in layered charge-density-wave system 1 T -TaS ₂₋ _x Se _x
journal, May 2013

Liu, Y.; Ang, R.; Lu, W. J.
Applied Physics Letters, Vol. 102, Issue 19
DOI: 10.1063/1.4805003

Carbon isotope effect in superconducting $Mg C {Ni}_{3}$
journal, December 2004

Klimczuk, T.; Cava, R. J.
Physical Review B, Vol. 70, Issue 21
DOI: 10.1103/PhysRevB.70.212514

Superconductivity in the quasi-two-dimensional conductor 2H-TaSe2
journal, July 2000

Yokota, K.
Physica B: Condensed Matter, Vol. 284-288
DOI: 10.1016/S0921-4526(99)02166-3

Charge Dynamics of 2H- ${TaSe}_{2}$ along the Less-Conducting $c$ -Axis
journal, April 2001

Ruzicka, B.; Degiorgi, L.; Berger, H.
Physical Review Letters, Vol. 86, Issue 18
DOI: 10.1103/PhysRevLett.86.4136

The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties
journal, May 1969

Wilson, J. A.; Yoffe, A. D.
Advances in Physics, Vol. 18, Issue 73
DOI: 10.1080/00018736900101307

Effect of discommensurations on the electrical resistivity of 2H-TaSe ₂
journal, March 1986

Jericho, M. H.; Ott, H. R.; Rice, T. M.
Journal of Physics C: Solid State Physics, Vol. 19, Issue 9
DOI: 10.1088/0022-3719/19/9/010

The dynamics of charge-density waves
journal, October 1988

Grüner, G.
Reviews of Modern Physics, Vol. 60, Issue 4
DOI: 10.1103/RevModPhys.60.1129

Temperature-dependent Fermi surface of $2 H {-TaSe}_{2}$ driven by competing density wave order fluctuations
journal, March 2009

Inosov, D. S.; Evtushinsky, D. V.; Zabolotnyy, V. B.
Physical Review B, Vol. 79, Issue 12
DOI: 10.1103/PhysRevB.79.125112

The non-stoichiometric phases Nb1+xSe2 and Ta1+xSe2
journal, June 1970

Huisman, R.; Kadijk, F.; Jellinek, F.
Journal of the Less Common Metals, Vol. 21, Issue 2
DOI: 10.1016/0022-5088(70)90117-7

VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data
journal, October 2011

Momma, Koichi; Izumi, Fujio
Journal of Applied Crystallography, Vol. 44, Issue 6
DOI: 10.1107/S0021889811038970

The structure of the incommensurate superlattices of 2H–TaSe ₂
journal, April 1981

Withers, R. L.; Bursill, L. A.
Philosophical Magazine B, Vol. 43, Issue 4
DOI: 10.1080/01418638108222165

Intercalation in Layered Transition Metal Dichalcogenides
book, January 1979

Rao, G. V. Subba; Shafer, M. W.
Intercalated Layered Materials
DOI: 10.1007/978-94-009-9415-7_3

Charge-Density Waves in Metallic, Layered, Transition-Metal Dichalcogenides
journal, April 1974

Wilson, J. A.; Di Salvo, F. J.; Mahajan, S.
Physical Review Letters, Vol. 32, Issue 16
DOI: 10.1103/PhysRevLett.32.882

Layer structure polytypism among niobium and tantalum selenides
journal, January 1965

Brown, B. E.; Beerntsen, D. J.
Acta Crystallographica, Vol. 18, Issue 1
DOI: 10.1107/S0365110X65000063

On the polymorphism of tantalum diselenide
journal, January 1969

Huisman, R.; Jellinek, F.
Journal of the Less Common Metals, Vol. 17, Issue 1
DOI: 10.1016/0022-5088(69)90041-1

Raman spectroscopy of the charge-density-wave state in $1 T$ - and $2 H - T a {Se}_{2}$
journal, November 1977

Tsang, J. C.; Smith, J. E.; Shafer, M. W.
Physical Review B, Vol. 16, Issue 10
DOI: 10.1103/PhysRevB.16.4239

Nb–Nb Interactions Define the Charge Density Wave Structure of 2H-NbSe ₂
journal, January 2013

Malliakas, Christos D.; Kanatzidis, Mercouri G.
Journal of the American Chemical Society, Vol. 135, Issue 5
DOI: 10.1021/ja3120554

From Mott state to superconductivity in 1T-TaS2
journal, November 2008

Sipos, B.; Kusmartseva, A. F.; Akrap, A.
Nature Materials, Vol. 7, Issue 12
DOI: 10.1038/nmat2318

Study of Superlattice Formation in $2 H$ -Nb ${Se}_{2}$ and $2 H$ -Ta ${Se}_{2}$ by Neutron Scattering
journal, March 1975

Moncton, D. E.; Axe, J. D.; DiSalvo, F. J.
Physical Review Letters, Vol. 34, Issue 12
DOI: 10.1103/PhysRevLett.34.734

Crystal structure, electrical properties and electronic band structure of tantalum ditelluride
journal, February 1998

Vernes, A.; Ebert, H.; Bensch, W.
Journal of Physics: Condensed Matter, Vol. 10, Issue 4
DOI: 10.1088/0953-8984/10/4/006

On the origin of charge-density waves in select layered transition-metal dichalcogenides
journal, May 2011

Rossnagel, K.
Journal of Physics: Condensed Matter, Vol. 23, Issue 21
DOI: 10.1088/0953-8984/23/21/213001

Quantum phase transition from triangular to stripe charge order in NbSe2
journal, January 2013

Soumyanarayanan, A.; Yee, M. M.; He, Y.
Proceedings of the National Academy of Sciences, Vol. 110, Issue 5
DOI: 10.1073/pnas.1211387110

Spin-orbit splitting, Fermi surface topology, and charge-density-wave gapping in $2 H − Ta {Se}_{2}$
journal, August 2007

Rossnagel, K.; Smith, N. V.
Physical Review B, Vol. 76, Issue 7
DOI: 10.1103/PhysRevB.76.073102

Contrast and Raman spectroscopy study of single- and few-layered charge density wave material: 2H-TaSe2
journal, September 2013

Hajiyev, Parviz; Cong, Chunxiao; Qiu, Caiyu
Scientific Reports, Vol. 3, Issue 1
DOI: 10.1038/srep02593

Structural and electrical properties of layered transition metal selenides V_xTi_1-xSe₂and Ta_xTi_1-xSe₂
journal, February 1979

Levy, F.; Froidevaux, Y.
Journal of Physics C: Solid State Physics, Vol. 12, Issue 3, p. 473-487
DOI: 10.1088/0022-3719/12/3/015

Generalized electronic susceptibility and charge-density waves in 2 $H$ -Ta ${Se}_{2}$ by Raman scattering
journal, February 1982

Sugai, S.; Murase, K.
Physical Review B, Vol. 25, Issue 4
DOI: 10.1103/PhysRevB.25.2418

Transition Temperature of Strong-Coupled Superconductors
journal, March 1968

McMillan, W. L.
Physical Review, Vol. 167, Issue 2
DOI: 10.1103/PhysRev.167.331

Similar Records in DOE PAGES and OSTI.GOV collections:

Structural, electronic and vibrational properties of few-layer 2H-and 1T-TaSe₂

Journal Article Yan, Jia -An ; Dela Cruz, Mack A. ; Cook, Brandon G. ; ... - Scientific Reports

Two-dimensional metallic transition metal dichalcogenides (TMDs) are of interest for studying phenomena such as charge-density wave (CDW) and superconductivity. Few-layer tantalum diselenides (TaSe₂) are typical metallic TMDs exhibiting rich CDW phase transitions. However, a description of the structural, electronic and vibrational properties for different crystal phases and stacking configurations, essential for interpretation of experiments, is lacking. We present first principles calculations of structural phase energetics, band dispersion near the Fermi level, phonon properties and vibrational modes at the Brillouin zone center for different layer numbers, crystal phases and stacking geometries. Evolution of the Fermi surfaces as well as the phononmore »« less
Cited by 37
https://doi.org/10.1038/srep16646

Full Text Available
Nanostructural and electronic properties of polytypes in InN nanocolumns

Journal Article Kioseoglou, J. ; Koukoula, T. ; Komninou, Ph. ; ... - Journal of Applied Physics

Transmission electron microscopy techniques and density functional theory calculations were employed to investigate the nanostructural and electronic properties of InN polytypes observed in InN nanocolumns, grown on Si(111) by molecular beam epitaxy. Moiré fringes and alternating hexagonal and cubic lattice stacking sequences along the c-axis, observed among the wurtzite layers, implied the presence of different structures embedded in the basic 2H structure of the nanocolumns. Quantitative electron diffraction analysis and high-resolution image simulations verified the coexistence of the wurtzite structure with the 4H, 6H, and the 3C zinc-blende structural polytypes. Total energies calculations established the 2H wurtzite structure as themore »« less
https://doi.org/10.1063/1.4818517
Anion mediated polytype selectivity among the basic salts of Co(II)

Journal Article Ramesh, T N ; Rajamathi, Michael ; Vishnu Kamath, P - Journal of Solid State Chemistry

Basic salts of Co(II) crystallize in the rhombohedral structure. Two different polytypes, 3R{sub 1} and 3R{sub 2}, with distinct stacking sequences of the metal hydroxide slabs, are possible within the rhombohedral structure. These polytypes are generated by simple translation of successive layers by (2/3, 1/3, z) or (1/3, 2/3, z). The symmetry of the anion and the mode of coordination influences polytype selection. Cobalt hydroxynitrate crystallizes in the structure of the 3R{sub 2} polytype while the hydroxytartarate, hydroxychloride and {alpha}-cobalt hydroxide crystallize in the structure of the 3R{sub 1} polytype. Cobalt hydroxysulfate is turbostratically disordered. The turbostratic disorder is amore »« less
https://doi.org/10.1016/j.jssc.2006.04.034
Topotactic synthesis, structure and magnetic properties of a new hexagonal polytype of silver cobaltate(III) AgCoO{sub 2+{delta}}

Journal Article Muguerra, Herve ; Colin, Claire ; Anne, Michel ; ... - Journal of Solid State Chemistry

A new form of delafossite-type AgCoO{sub 2+{delta}} was prepared using ion exchange from Na{sub 0.75}CoO{sub 2} in molten AgNO{sub 3}-NH{sub 4}NO{sub 3} at 175 deg. C. Its structure was determined by the Rietveld refinement from X-ray powder diffraction measurements (XRD) data; it is hexagonal, space group P6{sub 3}/mmc, a=2.871 and c=12.222 A. Its structure differs from previously reported AgCoO{sub 2} (R3-barm, 3R polytype) by the stacking of Co-O layers; in the new phase, the 2H stacking of the precursor Na{sub 0.75}CoO{sub 2} is consistent with a topotactic ion exchange of Na by Ag. The new phase is found to containmore »« less
https://doi.org/10.1016/j.jssc.2008.07.031
Revealing and Rationalizing the Rich Polytypism of Todorokite MnO₂

Journal Article Hu, Xiaobing ; Kitchaev, Daniil A. ; Wu, Lijun ; ... - Journal of the American Chemical Society

Polytypism, or stacking disorder, in crystals is an important structural aspect that can impact materials properties and hinder our understanding of the materials. One example of a polytypic system is todorokite–MnO₂, which has a unique structure among the transition-metal oxides, with large ionic conductive channels formed by the metal oxide framework that can be utilized for potential functionalization, from molecular/ion sieving to charge storage. In contrast to the perceived 3 × 3 tunneled structure, we reveal a coexistence of a diverse array of tunnel sizes in well-crystallized, chemically homogeneous one-dimensional todorokite–MnO₂. We explain the formation and persistence of this distributionmore »« less
Cited by 26
https://doi.org/10.1021/jacs.8b02971

Full Text Available

Similar Records

Title: Polytypism, polymorphism, and superconductivity in TaSe 2 −x Te x

Abstract

Citation Formats

Raman study of charge-density-wave excitations in 4 H b − T a S 2 journal, March 1984

Neutron scattering study of the charge-density wave transitions in 2 H − Ta Se 2 and 2 H − Nb Se 2 journal, July 1977

Questions concerning the form taken by the charge-density wave and the accompanying periodic-structural distortions in 2 H − T a Se 2 , and closely related materials journal, May 1978

Octahedral vs. trigonal-prismatic coordination and clustering in transition-metal dichalcogenides journal, June 1984

A short history of SHELX journal, December 2007

Visualizing the charge density wave transition in 2 H - NbSe 2 in real space journal, June 2014

On the Structural Properties of the Ta(1+x)Se2 Phase. journal, January 1967

Superconductivity induced by Se-doping in layered charge-density-wave system 1 T -TaS 2− x Se x journal, May 2013

Carbon isotope effect in superconducting Mg C Ni 3 journal, December 2004

Superconductivity in the quasi-two-dimensional conductor 2H-TaSe2 journal, July 2000

Charge Dynamics of 2H- TaSe 2 along the Less-Conducting c -Axis journal, April 2001

The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties journal, May 1969

Effect of discommensurations on the electrical resistivity of 2H-TaSe 2 journal, March 1986

The dynamics of charge-density waves journal, October 1988

Temperature-dependent Fermi surface of 2 H -TaSe 2 driven by competing density wave order fluctuations journal, March 2009

The non-stoichiometric phases Nb1+xSe2 and Ta1+xSe2 journal, June 1970

VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data journal, October 2011

The structure of the incommensurate superlattices of 2H–TaSe 2 journal, April 1981

Intercalation in Layered Transition Metal Dichalcogenides book, January 1979

Charge-Density Waves in Metallic, Layered, Transition-Metal Dichalcogenides journal, April 1974

Layer structure polytypism among niobium and tantalum selenides journal, January 1965

On the polymorphism of tantalum diselenide journal, January 1969

Raman spectroscopy of the charge-density-wave state in 1 T - and 2 H − T a Se 2 journal, November 1977

Nb–Nb Interactions Define the Charge Density Wave Structure of 2H-NbSe 2 journal, January 2013

From Mott state to superconductivity in 1T-TaS2 journal, November 2008

Study of Superlattice Formation in 2 H -Nb Se 2 and 2 H -Ta Se 2 by Neutron Scattering journal, March 1975

Crystal structure, electrical properties and electronic band structure of tantalum ditelluride journal, February 1998

On the origin of charge-density waves in select layered transition-metal dichalcogenides journal, May 2011

Quantum phase transition from triangular to stripe charge order in NbSe2 journal, January 2013

Spin-orbit splitting, Fermi surface topology, and charge-density-wave gapping in 2 H − Ta Se 2 journal, August 2007

Contrast and Raman spectroscopy study of single- and few-layered charge density wave material: 2H-TaSe2 journal, September 2013

Structural and electrical properties of layered transition metal selenides VxTi1-xSe2and TaxTi1-xSe2 journal, February 1979

Generalized electronic susceptibility and charge-density waves in 2 H -Ta Se 2 by Raman scattering journal, February 1982

Transition Temperature of Strong-Coupled Superconductors journal, March 1968

Title: Polytypism, polymorphism, and superconductivity in TaSe ₂ _−x Te _x

Raman study of charge-density-wave excitations in $4 H b - T a S_{2}$
journal, March 1984

Neutron scattering study of the charge-density wave transitions in $2 H - Ta {Se}_{2}$ and $2 H - Nb {Se}_{2}$
journal, July 1977

Questions concerning the form taken by the charge-density wave and the accompanying periodic-structural distortions in $2 H - T a {Se}_{2}$ , and closely related materials
journal, May 1978

Octahedral vs. trigonal-prismatic coordination and clustering in transition-metal dichalcogenides
journal, June 1984

A short history of SHELX
journal, December 2007

Visualizing the charge density wave transition in $2 H$ - ${NbSe}_{2}$ in real space
journal, June 2014

On the Structural Properties of the Ta(1+x)Se2 Phase.
journal, January 1967

Superconductivity induced by Se-doping in layered charge-density-wave system 1 T -TaS ₂₋ _x Se _x
journal, May 2013

Carbon isotope effect in superconducting $Mg C {Ni}_{3}$
journal, December 2004

Superconductivity in the quasi-two-dimensional conductor 2H-TaSe2
journal, July 2000

Charge Dynamics of 2H- ${TaSe}_{2}$ along the Less-Conducting $c$ -Axis
journal, April 2001

The transition metal dichalcogenides discussion and interpretation of the observed optical, electrical and structural properties
journal, May 1969

Effect of discommensurations on the electrical resistivity of 2H-TaSe ₂
journal, March 1986

The dynamics of charge-density waves
journal, October 1988

Temperature-dependent Fermi surface of $2 H {-TaSe}_{2}$ driven by competing density wave order fluctuations
journal, March 2009

The non-stoichiometric phases Nb1+xSe2 and Ta1+xSe2
journal, June 1970

VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data
journal, October 2011

The structure of the incommensurate superlattices of 2H–TaSe ₂
journal, April 1981

Intercalation in Layered Transition Metal Dichalcogenides
book, January 1979

Charge-Density Waves in Metallic, Layered, Transition-Metal Dichalcogenides
journal, April 1974

Layer structure polytypism among niobium and tantalum selenides
journal, January 1965

On the polymorphism of tantalum diselenide
journal, January 1969

Raman spectroscopy of the charge-density-wave state in $1 T$ - and $2 H - T a {Se}_{2}$
journal, November 1977

Nb–Nb Interactions Define the Charge Density Wave Structure of 2H-NbSe ₂
journal, January 2013

From Mott state to superconductivity in 1T-TaS2
journal, November 2008

Study of Superlattice Formation in $2 H$ -Nb ${Se}_{2}$ and $2 H$ -Ta ${Se}_{2}$ by Neutron Scattering
journal, March 1975

Crystal structure, electrical properties and electronic band structure of tantalum ditelluride
journal, February 1998

On the origin of charge-density waves in select layered transition-metal dichalcogenides
journal, May 2011

Quantum phase transition from triangular to stripe charge order in NbSe2
journal, January 2013

Spin-orbit splitting, Fermi surface topology, and charge-density-wave gapping in $2 H − Ta {Se}_{2}$
journal, August 2007

Contrast and Raman spectroscopy study of single- and few-layered charge density wave material: 2H-TaSe2
journal, September 2013

Structural and electrical properties of layered transition metal selenides V_xTi_1-xSe₂and Ta_xTi_1-xSe₂
journal, February 1979

Generalized electronic susceptibility and charge-density waves in 2 $H$ -Ta ${Se}_{2}$ by Raman scattering
journal, February 1982

Transition Temperature of Strong-Coupled Superconductors
journal, March 1968