Filling of the Mott-Hubbard gap in the high temperature photoemission spectrum of (V0.972Cr0.028)2O3 -: art. no. 076404

被引：31

作者：

Mo, SK ^{[1
]}

Kim, HD

Allen, JW

Gweon, GH

Denlinger, JD

Park, JH

Sekiyama, A

Yamasaki, A

Suga, S

Metcalf, P

Held, K

机构：

[1] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA

[2] Pohang Accelerator Lab, Pohang 790784, South Korea

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[4] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

[5] Osaka Univ, Grad Sch Engn, Dept Phys Mat, Osaka 5608531, Japan

[6] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[7] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.076404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photoemission spectra of the paramagnetic insulating phase of (V0.972Cr0.028)(2)O-3, taken in ultrahigh vacuum up to the unusually high temperature (T) of 800 K, reveal a property unique to the Mott-Hubbard (MH) insulator that has not been observed previously. With increasing T the MH gap is filled by spectral weight transfer, in qualitative agreement with high-T theoretical calculations combining dynamical mean field theory and band theory in the local density approximation.

引用

页码：076404 / 1

页数：4

共 20 条

[1] KONDO VOLUME COLLAPSE AND THE GAMMA-]ALPHA TRANSITION IN CERIUM [J].

ALLEN, JW ;

MARTIN, RM .

PHYSICAL REVIEW LETTERS, 1982, 49 (15) :1106-1110

[2] Finite-temperature numerical renormalization group study of the Mott transition [J].

Bulla, R ;

Costi, TA ;

Vollhardt, D .

PHYSICAL REVIEW B, 2001, 64 (04)

[3]

Gebhard F., 1997, MOTT METAL INSULATOR

[4] Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions [J].

Georges, A ;

Kotliar, G ;

Krauth, W ;

Rozenberg, MJ .

REVIEWS OF MODERN PHYSICS, 1996, 68 (01) :13-125

[5] HUBBARD-MODEL IN INFINITE DIMENSIONS [J].

GEORGES, A ;

KOTLIAR, G .

PHYSICAL REVIEW B, 1992, 45 (12) :6479-6483

[6]

Goodenough J. B., 1971, Annu. Rev. Mater. Sci, V1, P101, DOI [DOI 10.1146/ANNUREV.MS.01.080171.000533, 10.1146/annurev.ms.01.080171.000533]

[7] Mott-Hubbard metal-insulator transition in paramagnetic V2O3:: An LDA+DMFT(QMC) study [J].

Held, K ;

Keller, G ;

Eyert, V ;

Vollhardt, D ;

Anisimov, VI .

PHYSICAL REVIEW LETTERS, 2001, 86 (23) :5345-5348

[8] HUBBARD-MODEL IN INFINITE DIMENSIONS - A QUANTUM MONTE-CARLO STUDY [J].

JARRELL, M .

PHYSICAL REVIEW LETTERS, 1992, 69 (01) :168-171

[9]

KELLER G, CONDMAT0402133

[10] Landau theory of the finite temperature Mott transition [J].

Kotliar, G ;

Lange, E ;

Rozenberg, MJ .

PHYSICAL REVIEW LETTERS, 2000, 84 (22) :5180-5183

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