原著論文
- The resonating SDW solitons and breathers in the one
dimensional Hubbard model.
S. Yamamoto, A. Takahashi and H. Fukutome:
Synth. Met. 43, 3705-3708 (1991).
- Broken symmetry instabilities and solutions of the extended
Hubbard model.
M. Ozaki and S. Yamamoto:
Physica C 185-189, 1727-1728 (1991).
-
Resonating Hartree-Fock theory of the one dimensional
Hubbrd model I. Quantum fluctuations by SDW solitons and
breathers.
S. Yamamoto, A. Takahashi and H. Fukutome:
J. Phys. Soc. Jpn. 60, No. 10, 3433-3448 (1991).
-
Superpolaron model for metallic polyacetylene.
A. Takahashi, S. Yamamoto and H. Fukutome:
J. Phys. Soc. Jpn. 61, No. 1, 199-216 (1992).
-
Resonating Hartree-Fock theory of a one dimensional
electronic system.
S. Yamamoto, A. Takahashi and H. Fukutome:
Synth. Met. 49, 239-243 (1992).
-
Resonating Hartree-Fock theory of a one dimensional
electronic system.
S. Yamamoto, A. Takahashi and H. Fukutome:
Mol. Cryst. Liq. Cryst. 216, 145-150 (1992).
-
Non-magnetic broken symmetry solutions of the three-band
extended Hubbard model.
S. Yamamoto and M. Ozaki:
Solid State Commun. 83, No. 5, 329-334 (1992).
-
Magnetic broken symmetry solutions of the three-band
extended Hubbard model.
S. Yamamoto and M. Ozaki:
Solid State Commun. 83, No. 5, 335-341 (1992).
-
Resonating Hartree-Fock theory of the one dimensional
Hubbard model II. Breather fluctuations in the strong
correlation regime.
S. Yamamoto and H. Fukutome:
J. Phys. Soc. Jpn. 61, No. 9, 3209-3219 (1992).
-
Broken symmetry solutions of the two dimensional extended
Hubbard model and their instability conditions.
S. Yamamoto and M. Ozaki:
Int. J. Quantum Chem. 44, No. 6, 949-983 (1992).
- Thermodynamic properties of S = 1 antiferromagnetic Heisenberg chains.
S. Miyashita and S. Yamamoto:
J. Phys. Soc. Jpn. 62, No. 5, 1459-1462 (1993).
-
Orbital optimization in the resonating Hartree-Fock
approximation and its application to the one dimensional
Hubbard model.
A. Ikawa, S. Yamamoto and H. Fukutome:
J. Phys. Soc. Jpn. 62, No. 5, 1653-1668 (1993).
- Effects of edges in S = 1 Heisenberg antiferromagnitic chains.
S. Miyashita and S. Yamamoto:
Phys. Rev. B 48, No. 2, 913-919 (1993).
-
Broken symmetry solutions of the three-band extended
Hubbard model.
S. Yamamoto and M. Ozaki:
Physica B 186-188, 907-909 (1993).
-
Quantum fluctuations to destroy the antiferromagnetic spin
order in the one dimensional half filled Hubbard model.
A. Ikawa, S. Yamamoto and H. Fukutome:
Mol. Cryst. Liq. Cryst. 233, 81-88 (1993).
- Thermodynamic properties of S = 1 antiferromagnetic Heisenberg chains as Haldane systems.
S. Yamamoto and S. Miyashita:
Phys. Rev. B 48, No. 13, 9528-9538 (1993).
- World-line Monte Carlo study of the dispersion relation of an S = 1 antiferromagnetic Heisenberg chain.
S. Yamamoto and S. Miyashita:
J. Phys. Soc. Jpn. 63, No. 8, 2866-2869 (1994).
- Anisotropy effects on magnetic properties of an S = 1 antiferromgnetic Heisenberg chain.
S. Yamamoto and S. Miyashita:
Phys. Rev. B 50, No. 9, 6277-6288 (1994).
- Ground state properties of S = 1 antiferromagnetic Heisenberg chains with bond alternation.
S. Yamamoto:
J. Phys. Soc. Jpn. 63, No. 12, 4327-4330 (1994).
- Magnetization of S = 1 antiferromagnetic Heisenberg chains.
S. Yamamoto and S. Miyashita:
Phys. Rev. B 51, No. 6, 3649-3654 (1995).
-
Quantum fluctuations in the one dimensional Hubbard model
with a less than half filling.
S. Yamamoto, A. Ikawa and H. Fukutome:
Synth. Met. 69, No. 1-3, 709-710 (1995).
- Elementary excitations of S = 1 antiferromagnetic Heisenberg chains with bond alternation.
S. Yamamoto:
Phys. Rev. B 51, No. 22, 16128-16134 (1995).
- Critical exponent η in S = 1 antiferromagnetic Heisenberg chains with alternating interaction.
S. Yamamoto:
Phys. Rev. B. 52, No. 14, 10170-10176 (1995).
-
Quantum-classical crossover in temperature dependence of
the magnetic susceptibility of Haldane system.
S. Yamamoto:
J. Phys. Soc. Jpn. 64, No. 10, 4051-4052 (1995).
-
Quantum Monte Carlo approach to elementary excitations of
antiferromagnetic Heisenberg chains.
S. Yamamoto:
Phys. Rev. Lett. 75, No.18, 3348-3351 (1995).
- Thermodynamic properties of S = 2 antiferromagnetic Heisenberg chains.
S. Yamamoto:
Phys. Rev. B. 53, No.6, 3364-3373 (1996).
- Spin correlations and Haldane gap in the S = 2 antiferromagnetic Heisenberg chain.
S. Yamamoto:
Phys. Lett. A. 213, No. 1-2, 102-106 (1996).
- Reply to Comment on "Quantum Monte Carlo approach to elementary excitations
of antiferromagnetic Heisenberg chains".
S. Yamamoto:
Phys. Rev. Lett. 77, No. 13, 2844-2844 (1996).
- Quantum fluctuations in the ground state of the S = 1 antiferromagnetic Heisenberg chain.
S. Yamamoto:
Phys. Lett. A. 225, No. 1-3, 157-166 (1997).
-
Matrix-product-states approach to the Heisenberg
ferrimagnetic spin chains.
A. K. Kolezhuk, H.-J. Mikeska and S. Yamamoto:
Phys. Rev. B. 55, No. 6, R3336-R3339 (1997).
-
Phase transitions in antiferromagnetic quantum spin chains
with bond alternation.
S. Yamamoto:
Phys. Rev. B. 55, No. 6, 3603-3612 (1997).
- Low-temperature properties of quantum antiferromagnetic chains with alternating spins S = 1 and S = 1/2.
S. Brehmer, H.-J. Mikeska and S. Yamamoto:
J. Phys.: Condens. Matter 9, No. 19, 3921-3930 (1997).
-
An efficient Monte Carlo approach to low-lying excitations of
quantum spin chains.
S. Yamamoto:
Int. J. Mod. Phys. C. 8, No. 3, 609-634 (1997).
- Low-lying excitations in the S = 1 antiferromagnetic Heisenberg chain.
S. Yamamoto and S. Miyashita:
Phys. Lett. A 235, No. 5, 545-550 (1997).
-
Elementary excitations of Heisenberg ferrimagnetic
spin chains.
S. Yamamoto, S. Brehmer and H.-J. Mikeska:
Phys. Rev. B 57, No. 21, 13610-13616 (1998).
-
Thermodynamic properties of Heisenberg ferrimagnetic
spin chains:
Ferromagnetic-antiferromagnetic crossover.
S. Yamamoto and T. Fukui:
Phys. Rev. B 57, No. 22, R14008-R14011 (1998).
- Breakdown of the spin-1 Haldane phase via quantum fluctuations.
S. Yamamoto:
Int. J. Mod. Phys. B 12, No. 18, 1795-1808 (1998).
- Thermodynamics of the (1, 1/2) ferrimagnet in finite magnetic fields.
K. Maisinger, U. Schollw\"ock, S. Brehmer, H.-J. Mikeska
and S. Yamamoto:
Phys. Rev. B 58, No. 10, R5908-R5911 (1998).
-
Novel density-wave states of two-band Peierls-Hubbard chains.
S. Yamamoto:
Phys. Lett. A 247, No. 6, 422-434 (1998).
-
Low-energy structure of Heisenberg ferrimagnetic spin chains.
S. Yamamoto and T. Sakai:
J. Phys. Soc. Jpn. 67, No. 11, 3711-3714 (1998).
-
Combination of ferromagnetic and antiferromagnetic features
in Heisenberg ferrimagnets.
S. Yamamoto, T. Fukui, K. Maisinger and U. Schollw\"ock:
J. Phys.: Condens. Matter 10, No. 48, 11033-11048 (1998).
-
Magnetic properties of quantum ferrimagnetic spin chains.
S. Yamamoto:
Phys. Rev. B 59, No. 2, 1024-1027 (1999).
-
Ground-state properties of the two-band model for
halogen-bridged metal complexes.
S. Yamamoto:
Synth. Met. 103, No. 1-3, 2683-2686 (1999).
-
Breakdown of a magnetization plateau due to anisotropy in
Heisenberg mixed-spin chains.
S. Yamamoto and T. Sakai:
J. Phys.: Condens. Matter 11, No. 26, 5175-5186 (1999).
-
Broken-symmetry ground states of halogen-bridged binuclear
metal complexes.
S. Yamamoto:
Phys. Lett. A 258, No. 2-3, 183-187 (1999).
-
Critical behavior of anisotropic Heisenberg mixed-spin
chains.
T. Sakai and S. Yamamoto:
Phys. Rev. B 60, No. 6, 4053-4056 (1999).
-
Simulated nuclear spin-lattice relaxation in Heisenberg
ferrimagnets:
Indirect observation of quadratic dispersion relations.
S. Yamamoto:
Phys. Rev. B 61, No.2, R842-R845 (2000).
-
Competing ground states of the new class of halogen-bridged
metal complexes.
S. Yamamoto:
J. Phys. Soc. Jpn. 69, No. 1, 13-16 (2000).
-
Nuclear spin relaxation in ordered bimetallic chain
compounds.
S. Yamamoto:
Phys. Lett. A 265, No. 1-2, 139-144 (2000).
-
Characterization of ferrimagnetic Heisenberg chains according
to the constituent spins.
S. Yamamoto, T. Fukui and T. Sakai:
Eur. Phys. J. B 15, No. 2, 211-219 (2000).
-
Numerical simulation of the proton spin-lattice relaxation in
bimetallic chain compounds.
S. Yamamoto:
Prog. Theor. Phys. Suppl. 138, 84-89 (2000).
-
Magnetization plateau in one-dimensional quantum
ferrimagnets.
T. Sakai and S. Yamamoto:
Prog. Theor. Phys. Suppl. 138, 513-514 (2000).
-
Modified spin-wave description of the nuclear spin relaxation
in ferrimagnetic Heisenberg chains.
S. Yamamoto:
J. Phys. Soc. Jpn. 69, No. 7, 2324-2330 (2000).
-
Multi-plateau magnetization curves of one-dimensional
ferrimagnets.
S. Yamamoto and T. Sakai:
Phys. Rev. B 62, No. 6, 3795-3800 (2000).
-
Coexistent quantum and classical aspects of magnetization
plateaux in alternating-spin chains.
T. Sakai and S. Yamamoto:
J. Phys.: Condens. Matter 12, No. 47, 9787-9797 (2000).
- Significance of the direct relaxation process in the low-energy spin dynamics of a one-dimensional ferrimagnet NiCu(C7H6N2O6)(H2O)3・2H2O.
S. Yamamoto:
Solid State Commun. 117, No. 1, 1-5 (2001).
-
Characterization of halogen-bridged binuclear metal complexes
as hybridized two-band materials.
S. Yamamoto:
Phys. Rev. B 63, No. 125124, 1-16 (2001).
-
Quantum and thermal phase transitions of halogen-bridged
binuclear transition-metal complexes.
S. Yamamoto:
J. Phys. Soc. Jpn. 70, No. 5, 1198-1201 (2001).
-
Low-temperature properties of quasi-one-dimensional
molecule-based ferromagnets.
T. Nakanishi, S. Yamamoto and T. Sakai:
J. Phys. Soc. Jpn. 70, No. 5, 1380-1389 (2001).
-
Proton spin relaxation in ordred bimetallic chain compounds.
S. Yamamoto:
Synth. Met. 121, No. 3, 1782-1783 (2001).
-
Quantum magnetization plateaux in ferrimagnetic spin chains.
T. Sakai and S. Yamamoto:
J. Mag. Mag. Mat. 226, No. 1, 645-646 (2001).
- Pressure-induced phase transitions of halogen-bridged binuclear metal complexes
R4[Pt2(P2O5H2)4X] ・n H2O.
S. Yamamoto:
Phys. Rev. B 64, No. 140102(R), 1-4 (2001).
-
Soliton excitations in halogen-bridged mixed-valence binuclear
metal complexes.
S. Yamamoto and M. Ichioka:
J. Phys. Soc. Jpn. 71, No. 1, 189-196 (2002).
-
Pressure-induced reverse Peierls and Peierls instabilities in
halogen-bridged binuclear metal complexes.
S. Yamamoto:
J. Phys. Chem. Solids 63, No. 6-8, 1489-1493 (2002).
- Quantum phase competition in antiferromagnetic spin-1 ladders.
S. Yamamoto, T. Sakai and A. Koga:
Prog. Theor. Phys. Suppl. 145, 176-181 (2002).
-
Halogen-bridged binuclear metal complexes under static
pressure.
Y. Eguchi and S. Yamamoto:
Mol. Cryst. Liq. Cryst. 379, 549-554 (2002).
-
Solitons in quasi-one-dimensional binuclear metal complexes.
S. Yamamoto:
Mol. Cryst. Liq. Cryst. 379, 555-560 (2002).
- Re-entrant quantum phase transitions in antiferromagnetic spin-1 ladders.
S. Yamamoto, T. Sakai and A. Koga:
J. Phys. Soc. Jpn. 71, No. 5, 1250-1253 (2002).
-
Intrinsic double-peak structure of the specific heat in
low-dimensional quantum ferrimagnetis.
T. Nakanishi and S. Yamamoto:
Phys. Rev. B 65, No. 214418, 1-5 (2002).
-
Fermionic description of spin-gap states of antiferromagnetic
Heisenberg ladders in a magnetic field.
H. Hori and S. Yamamoto:
J. Phys. Soc. Jpn. 71, No. 6, 1607-1608 (2002).
- Spin-wave description of nuclear spin-lattice relaxation in Mn12O12 acetate.
S. Yamamoto and T. Nakanishi:
Phys. Rev. Lett. 89, No. 157603, 1-4 (2002).
-
Possible nonlinear excitations in quasi-one-dimensional
halgen-bridged binuclear metal complexes.
S. Yamamoto:
Phys. Rev. B 66, No. 165113, 1-8 (2002).
- Pressure effects on an S = 1 Haldane compound Ni(C5H14N2)2N3(PF6).
M. Mito, H. Akama, H. Deguchi, S. Takagi, T. Kawae, K. Takeda,
M. Yamashita, H. Nakao, Y. Murakami and S. Yamamoto:
J. Phys. Soc. Jpn. 72, No. 2, 399-404 (2003).
- Spin-wave description of Haldane-gap antiferromagnets.
S. Yamamoto and H. Hori:
J. Phys. Soc. Jpn. 72, No. 4, 769-772 (2003).
- Quantum and thermal phase transitions in the Bechgaard salts and their analogs.
H. Hori and S. Yamamoto:
Synth. Met. 135-136, 557-558 (2003).
- Nuclear spin-lattice relaxation in ferrimagnetic clusters and chains:
A contrast between zero and one dimensions.
H. Hori and S. Yamamoto:
Phys. Rev. B 68, No. 054409, 1-6 (2003).
- Bosonic representation of one-dimensional Heisenberg ferrimagnets.
S. Yamamoto:
Phys. Rev. B 69, No. 064426, 1-9 (2004).
- Static and Dynamic Properties of Antiferromagnetic Heisenberg Ladders:
Fermionic versus Bosonic Approaches.
H. Hori and S. Yamamoto:
J. Phys. Soc. Jpn. 73, No. 3, 549-552 (2004).
- Nuclear Magnetic Relaxation in the Haldane-Gap Antiferromagnet Ni(C2H8N2)2NO2(ClO4).
S. Yamamoto and H. Hori:
J. Phys. Soc. Jpn. 73, No. 4, 822-825 (2004).
- Spinless fermions versus spin waves in describing antiferromagnetic Heisenberg
ladders.
H. Hori and S. Yamamoto:
J. Mag. Mag. Mat. 272-276, 269-270 (2004).
- Nuclear spin-lattice relaxation in one-dimensional Heisenberg ferrimagnets:
Three-magnon versus Raman processes.
H. Hori and S. Yamamoto:
J. Phys. Soc. Jpn. 73, No. 6, 1453-1456 (2004).
- Soliton-induced optical absorption of halogen-bridged mixed-valence binuclear
metal complexes.
J. Ohara and S. Yamamoto:
Phys. Rev. B 70, No. 115112, 1-5 (2004).
- Nuclear magnetic relaxation in the ferrimagnetic chain compound NiCu(C7H6N2O6)(H2O)3・2H2O: Three-magnon scattering?
H. Hori and S. Yamamoto:
J. Phys.: Condens. Matter 16, No. 49, 9023-9029 (2004).
- Effects of edges in spin-1/2 bond-alternating Heisenberg chains:
Matrix-product variational approach.
K. Funase and S. Yamamoto:
Phys. Lett. A 334, No. 2-3, 220-225 (2005).
- Photoinduced absorption spectra of halogen-bidged binuclear metal complexes:
Possible contrast between R4[Pt2(P2O5H2)4X] ・nH2O and Pt2(CH3CS2)4I.
J. Ohara and S. Yamamoto:
J. Phys. Soc. Jpn. 74, No. 1, 250-253 (2005).
- Modified Spin-Wave Theory of Nuclear Magnetic Relaxation in One-Dimensional
Quantum Ferrimagnets: Three-Magnon versus Raman Processes.
S. Yamamoto and H. Hori:
J. Phys. Soc. Jpn. 74, Suppl., 75-79 (2005).
- Transport in gapped quantum antiferromagnets.
T. Sakai and S. Yamamoto:
J. Phys. Soc. Jpn. 74, Suppl., 191-195 (2005).
- Low-temperature thermodynamics of one-dimensional alternating-spin Heisenberg
ferromagnets.
S. Yamamoto and H. Hori:
Phys. Rev. B 72, No. 054423, 1-6 (2005).
- Fermionic versus bosonic descriptions of one-dimensional spin-gapped antiferromagnets.
S. Yamamoto and K. Funase:
Low Temp. Phys. 31, No. 8, 740-747 (2005).
- Effects of the electron-phonon interaction on the charge ordering in quasi-one-dimensional
charge-transfer salts.
H. Hori and S. Yamamoto:
Synth. Met. 152, No. 1-3, 409-412 (2005).
- Transport properties of organic spin-gapped antiferromagnets.
T. Sakai and S. Yamamoto:
Synth. Met. 152, No. 1-3, 477-480 (2005).
- Photoinduced infrared absorption of quasi-one-dimensional halogen-bridged
binuclear transition-metal complexes.
J. Ohara and S. Yamamoto:
J. Phys. Chem. Solids 66, No. 8, 1571-1574 (2005).
- Nonlinear lattice relaxation of photoexcited diplatinum-halide chain compounds.
J. Ohara and S. Yamamoto:
Phys. Rev. B 73, No. 045122, 1-7 (2006).
- Competing ground states of metal-halide ladders.
K. Funase and S. Yamamoto:
J. Phys. Soc. Jpn. 75, No. 044717, 1-5 (2006).
- Evidence for multimagnon-mediated nuclear spin relaxation in the intertwining
double-cain ferrimagnet Ca3Cu3(PO4)4.
S. Yamamoto, H. Hori, Y. Furukawa, Y. Nishisaka, Y. Sumida, K. Yamada,
K. Kumagai, T. Asano and Y. Inagaki:
J. Phys. Soc. Jpn. 75, No. 074703, 1-5 (2006).
- Spin dynamics in molecular ring nanomagnets: Significant effect of acoustic
phonons and magnetic anisotropies.
S. Yamamoto and T. Hikihara:
to be published in J. Phys. Soc. Jpn. 75, No. 103701, 1-4 (2006).
- Low-energy structure of the intertwining double-chain ferrimagnets A3Cu3(PO4)4 (A = Ca, Sr, Pb).
S. Yamamoto and J. Ohara:
Phys. Rev. B 76, No. 014409, 1-8 (2007).
- Optical characterization of platinum-halide ladder compounds.
S. Yamamoto and J. Ohara:
Phys. Rev. B 76, November 15, No. 1951XX, 1-8 (2007).
著書・解説
- Inhomogeneity effects in quantum spin systems.
S. Miyashita, J. Behre and S. Yamamoto:
in Quantum Monte Carlo Methods in Condensed Matter Physics,
edited by M. Suzuki (World Scientific, Singapore, 1993) pp. 97-111.
- ハルデイン系としてのS = 1反強磁性ハイゼンベルグ鎖の熱力学的性質
―隠れた秩序状態に生ずる量子的及び熱的揺らぎ―.
山本昌司, 宮下精二:
素粒子論研究 88, No. 5, E63-E72 (1994).
- Quantum Monte Carlo studies on low dimensional spin systems.
S. Miyashita, S. Yamamoto and T. Nakamura:
in Computational Physics as a New Frontier in Condensed Matter Research,
edited by H. Takayama, M. Tsukada, H. Shiba, F. Yonezawa, M. Iamada and Y. Okabe
(The Physical Society of Japan, Tokyo, 1995) pp. 171-179.
- フェリ磁性混合スピン鎖の量子物性―強磁性と反強磁性の交錯―.
山本昌司:
固体物理 34, No. 1, 36-48 (1999).
- 低次元スピン波理論の新しい展開.
山本昌司:
固体物理 38, No. 5, 332-344 (2003).
- Recent Progress of the Low-Dimensional Spin-Wave Theory.
S. Yamamoto:
in Recent Research Developments in Physics, Vol. 4,
(Transworld Research Network, Kerala, 2003), pp. 443-461.
- 1次元で観えた多重マグノン核磁気緩和過程.
山本昌司:
電子スピンサイエンス学会誌 4, 秋季号, 96-103 (2006).